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OEJV Publications
Note on conference proceedings in OEJV
The scientific content of the proceeding contributions has been refereed by the conference proceedings editors, not by the OEJV editorial board.
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| 0114 | Light curve analysis of XX Cygni from data taken using DSLR
295 kB
appendix: Photometric data for XX Cygni 62 kB
| Davide Fiacconi, Luciano Tinelli | | 2009-10-07 | | | XX Cygni belongs to the SX Phoenicis class of short period variable stars. The pourpose of this paper is to analize data taken by the authors with a common Digital Single Lens Reflex (DSLR) and try to understand the capability of this type of camera in photometric measurements. From data taken during summertime and from the AAVSO International Database, we try to determine the behaviour of the main period of the star and research for other important frequency component by periodigram and Observed-Calculated (O-C) diagram. Simbad object(s): XX Cyg, | comments: 0 |
| | 0113 | Discovery Of a New Delta Scuti Variable Star
346 kB
appendix: Photometric data 21 kB
| Albino Carbognani | | 2009-10-05 | | | This paper reports the serendipitously discovery of a new variable star with mean visual magnitude +14.73 +/- 0.03 mag and mean V-R color indice 0.33 +/- 0.03 in Ophiuchus constellation (RA = 16h 53m 02.14s, DE = -01° 09\' 5,6\" (J2000.0)). The shape of the raw lightcurve and the observed periods lead to the conclusion that the star is a delta Scuti with a period of 0.05300 +/- 0.00004 days with an amplitude of 0.07 +/- 0.01 mag in R band. The knowledge of the star period allows an estimate of the distance that, considering interstellar absorption, is about 1000 pc. Simbad object(s): UCAC2 31353662, | comments: 0 |
| | 0112 | Search For Variable Stars in the Field of The Young Open Cluster NGC 957
299 kB
appendix: Photometry of new variables 36 kB
| Bukowiecki Ł., Maciejewski G., Bykowski W., Georgiev T., Boeva S., Kacharov N., Mihov B., Latev G., Ovcharov E., Valcheva A. | | 2009-10-03 | | | We report on discovery of 10 eclipsing binaries, 3 regular pulsating stars and 1 semi-regular variable in the field of the open cluster NGC 957. Only one of them – a short period semi-detached eclipsing binary – was be a likely cluster member. No short-period pulsating variables were found in the cluster. Simbad object(s): NGC 957, | comments: 0 |
| | 0111 | Three New Variable Stars in Indus
825 kB
appendix: LightCurve of USNO-B1.0 0315-0775167 3 kB
appendix: LightCurve of USNO-B1.0 0309-0771315 3 kB
appendix: LightCurve of USNO-B1.0 0311-0760061 3 kB
| Alex Golovin, Kirill Sokolovsky, Natalia Virnina, Javier Lopez Santiago | | 2009-09-29 | | | We report the discovery of three new variable stars in Indus: USNO-B1.0 0311-0760061, USNO-B1.0 0309-0771315, and USNO-B1.0 0315-0775167. Light curves of 3712 stars in a 87'x58' field centered on the asynchronous polar CD Ind were obtained using a remotely controlled 150 mm telescope of Tzec Maun Observatory (Pingelly, Western Australia). The VaST software based on SExtractor package was used for semi-automatic search for variable stars. We suggest the following classification for the newly discovered variable stars: USNO-B1.0 0311-0760061 - RR Lyr-type, USNO-B1.0 0309-0771315 - W UMa-type, and USNO-B1.0 0315-0775167 - W UMa-type. Simbad object(s): CD Ind, USNO-B1.0 0313-0766011, USNO-B1.0 0315-0775167, USNO-B1.0 0309-0771315, USNO-B1.0 0311-0760061, | comments: 0 |
| | 0110 | Improved parameters of the RR Lyrae variable USNO-A2.0 1200-07442272
142 kB
appendix: Photometric data 9 kB
| Christopher Lloyd, Yenal Ögmen | | 2009-09-29 | | | A refined period of 0.3488463(18) and Fourier decomposition components are provided for the RR Lyrae variable USNO-A2.0 1200-07442272, which lies in the field of TY Boo. The star is found to an RRc variable with a hump on the rising branch, and also has very low metallicity, [Fe/H] ZW = -1.5 and [Fe/H] CG = -1.2, typical of the halo population. It is an extreme halo object and probably lies at nearly 6 kpc from the galactic plane. Simbad object(s): 2MASS J15004755+3509514, | comments: 0 |
| | 0109 | Proceedings of the 40th Conference on Variable Stars Research
4423 kB | R. Kocian, V. Pribik , L. Brat, R. Hudec, M. Spurny, M. Krizek, P. Pata, R. Slosiar, M. Rerabek, S. Poddany, M. Hrudkova, V. Simon, L. Hudec, M. Kocka, T. Krejcova, P. Chadima, P. Harmanec, O. Demircan, A. Paschke, | | 2009-09-21 | | | A new HADS type variable star in Auriga, Alternative methods for detection of GRBs, Brief demonstration of the new developed database of the transiting planets, Can we find other bodies in transiting extrasolar systems?, ESA Gaia: The variability based on low dispersion spectra, Photometry of extrasolar planets, SID monitor indirect observation and monitoring of Solar flares, The mysterious and complicated interacting binary beta Lyr, new proof of the existence of various structures of a circumstellar matter, The O-C gate, The strange optically variable source SWIFT J195509+261406 and implication for optical observers Simbad object(s): HD 165763, NGC 7009, SWIFT J195509.6+261406, GRB 070610, GRO J1744-28, V4641 Sgr, bet Lyr, TrES-2, CI Cam, X Cyg X-1, X Sco X-1, SS 433, XTE J1118+480, GRO J1655-40, HD 190918, HS0822+3542, X Cam, CoRoT-Exo-2, HD 189733, HD 209458, ... | comments: 0 |
| | 0108 | Chromospherically active stars in the OGLE-II database: Paper 1. 25 new variables
1321 kB | Klaus Bernhard | | 2009-08-13 | | | Abstract: 25 new chromospherically active stars are presented, which were found in the OGLE-II database: OGLE-II NOR_SC1_127324, OGLE-II BUL_SC1_268450, OGLE-II BUL_SC4_648283, OGLE-II BUL_SC4_268274, OGLE-II BUL_SC4_293840, OGLE-II BUL_SC4_475761, OGLE-II BUL_SC33_691176, OGLE-II BUL_SC35_347003, OGLE-II BUL_SC35_369625, OGLE-II BUL_SC35_521447, OGLE-II BUL_SC35_544397, OGLE-II BUL_SC35_555023, OGLE-II BUL_SC35_576350, OGLE-II BUL_SC36_204166, OGLE-II BUL_SC36_636869, OGLE-II BUL_SC45_125532, OGLE-II BUL_SC45_126250, OGLE-II CAR_SC1_35056, OGLE-II CAR_SC1_38287, OGLE-II CAR_SC1_85427, OGLE-II BUL_SC4_280309, OGLE-II BUL_SC5_194541, OGLE-II BUL_SC4_14642, OGLE-II BUL_SC4_280505, OGLE-II BUL_SC4_281800 Simbad object(s): OGLE BUL-SC4 281800, OGLE BUL-SC4 280505, OGLE BUL-SC4 14642, OGLE BUL-SC5 194541, OGLE BUL-SC4 280309, OGLE CAR-SC1 85427, OGLE CAR-SC1 38287, OGLE CAR-SC1 35056, OGLE BUL-SC45 126250, OGLE BUL-SC45 125532, OGLE BUL-SC36 636869, OGLE BUL-SC36 204166, OGLE BUL-SC35 576350, OGLE BUL-SC35 555023, OGLE BUL-SC35 544397, OGLE BUL-SC35 521447, OGLE BUL-SC35 369625, OGLE BUL-SC35 347003, OGLE BUL-SC33 691176, OGLE BUL-SC4 475761, ... | comments: 0 |
| | 0107 | B.R.N.O. Contributions #36, Times of minima
1763 kB
appendix: 557 times of minima 59 kB
| L. Brat, J. Trnka, M. Lehky, L. Smelcer, H. Kucakova, R. Ehrenberger, R. Dreveny, F. Lomoz, P. Marek, R. Kocian, P. Svoboda, V. Pribik, L. Urbancok, S. Poddany, P. A. Dubovsky, R. Uhlar, P. Horalek, D. Hanzl, M. Broz, T. Kalisch, O. Macek, M. Exnerova, M. Vitek | | 2009-06-29 | | | Paper presents observations of eclipsing binaries acquired by the Variable Star and Exoplanet Section of Czech Astronomical Society members (B.R.N.O. observing project). Paper contains 557 minima timings for 265 eclipsing binaries, obtained by 21 observers during 2008 – 2009 period. Simbad object(s): BS Cas, USNO-B1.0 1510-0027592, AL Cas, LR Cam, HW Cam, AV Cam, ZZ Boo, XY Boo, TZ Boo, SY Boo, GU Boo, GP Boo, GK Boo, GH Boo, GG Boo, FY Boo, EW Boo, EQ Boo, CK Boo, AC Boo, ... | comments: 0 |
| | 0106 | Period analysis of the eclipsing binary DM Del
152 kB
appendix: Data file with observations 6 kB
| Petr Zasche, Robert Uhlar, Petr Svoboda | | 2009-06-08 | | | The eclipsing binary system DM Del reveals changes of its orbital period. These variations could be described as a result of orbiting the eclipsing pair around a common center of mass with an unseen companion with the period about 33 years. Seven new minima observations were carried out by the authors. Simbad object(s): DM Del, | comments: 1 |
| | 0105 | Chromospherically active stars in the ROTSE-1 database: Paper 4. Another 25 new variables
1906 kB | Joerg Schirmer, Klaus Bernhard, Christopher Lloyd | | 2009-05-06 | | | Abstract: Another 25 new chromospherically active stars are presented, which were found in the ROTSE-1 database: GSC 00140-01925, GSC 00563-00384, GSC 05165-00365, GSC 01956-00231, GSC 00723-00863, GSC 00324-00779, GSC 04688-02015, GSC 01683-00144, GSC 02424-00544, GSC 02741-01676, GSC 05003-00138, GSC 00990-02029, GSC 00024-00224, GSC 02236-00568, GSC 02460-00622, GSC 03125-01976, GSC 00583-00566, GSC 05183-00044, GSC 02933-02042, GSC 01572-00794, GSC 01571-01349, GSC 00110-01049, GSC 02221-00759, GSC 04767-00071, GSC 04734-00020 Simbad object(s): GSC 00140-01925, GSC 00563-00384, GSC 05165-00365, GSC 01956-00231, GSC 00723-00863, GSC 00324-00779, GSC 04688-02015, GSC 01683-00144, GSC 02424-00544, GSC 02741-01676, GSC 05003-00138, GSC 00990-02029, GSC 00024-00224, GSC 02236-00568, GSC 02460-00622, GSC 03125-01976, GSC 00583-00566, GSC 05183-00044, GSC 02933-02042, GSC 01572-00794, ... | comments: 0 |
| | 0104 | 66 New Variable Stars from SAVS Sky Survey
691 kB
appendix: Light curves of regular variables 54 kB
appendix: Light curves of semi-regular variables 47 kB
appendix: Light curves of irregular variables 37 kB
| M. Lewandowski, M. Gorecka, G. Maciejewski, A. Niedzielski | | 2009-04-07 | | | Light curves of 66 new variable stars discovered by the Semi-Automatic Variability Search are presented. We report on discovery of 23 eclipsing binaries, 5 regular pulsating stars, 14 semi-regular variables, and 24 irregular ones among the others. Simbad object(s): GSC 04421 00400, GSC 03011 01150, TYC 3305 01469, GSC 03303 01583, GSC 02822 01558, GSC 02825 00603, GSC 04421 00050, GSC 04424 01787, TYC 4215 01480, GSC 04439 01124, GSC 04448 01301, GSC 04453 01543, GSC 04453 00432, GSC 04449 01278, GSC 03226 01616, GSC 03621 00711, GSC 03996 00791, TYC 3992 02365, GSC 03996 01098, TYC 3993 01515, ... | comments: 0 |
| | 0103 | Ccd Photometry of Nova V2362 Cyg
402 kB
appendix: Photometry of V2362 Cyg 28 kB
| Ladislav Šmelcer | | 2009-04-07 | | | Results of CCD photometry of V 2362 Cyg nova are published in this work. They were achieved at the Observatory in Valašské Meziříčí on 24th November – 14th December 2006, which was in the period of its second brightness maximum. During 4 hours lasting photometry on 8th December 2006 nova brighten about 0.1 mag for a short time. According to L. Hric (2008) it could be a flickering activity. Theoretical model correspond with turbulent streams of mass in acretion disk around compact element. Similar phenomen could be seen at recurrent novae (RS Oph) Simbad object(s): V2362 Cyg, | comments: 0 |
| | 0102 | Five New Variable Stars in the Field of the Old Nova RS Car
292 kB
appendix: Data files for new discoveries 61 kB
appendix: Simbad objects - matches OGLE to 2MASS using Vizier facility 0 kB
| M. P. Nicholson | | 2009-04-07 | | | Five new eclipsing binary stars (2MASS J11080308-6145589, 2MASS J11080447-6143290, 2MASS J11080559-6147079, 2MASS J11083782-6146288 and 2MASS J11085087-6143349) have been identified in the field of the 1895 nova RS Car. The phase plots indicate that all five stars are eclipsing binary stars of the EA subtype. Simbad object(s): 2MASS J11080308-6145589, 2MASS J11080447-6143290, 2MASS J11080559-6147079, 2MASS J11083782-6146288, 2MASS J11085087-6143349, | comments: 0 |
| | 0101 | Recovery of W Dor & SS Pav
1023 kB | Mati Morel | | 2009-04-01 | | | Innes (1921) reported a list of 11 stars as being variable. A careful examination of the material presented by Innes in his paper, in its entirety, allows me to draw some conclusions about the quality of certain plates used. Two variables, W Dor and SS Pav, which have been hitherto unidentifiable, can now be identified. Simbad object(s): W Dor, SS Pav, | comments: 0 |
| | 0100 | The 2008 Primary Eclipse of OW Gem
80 kB
appendix: BV observations of OW Gem 1 kB
| Shawn Dvorak | | 2009-04-01 | | | Observations of the 2008 eclipse of the rare supergiant eclipsing binary OW Gem yield new high-quality times of minima. Combining this new data with all previously published ToMs yields an improved period of 1258.581(9) days. Simbad object(s): OW Gem, | comments: 0 |
| | 0099 | Three New Eclipsing Binary Stars in Field of OP Lac
1103 kB
appendix: HKV5Lac_20070922-20081023_R_LEH - data 210 kB
appendix: HKV6Lac_20070922-20081023_R_LEH - data 233 kB
appendix: HKV7Lac_20070922-20081023_R_LEH - data 218 kB
| Martin Lehký | | 2009-03-27 | | | The new EW eclipsing binary HKV5 Lac = CzeV137 = USNO-B1.0 1454-0411281 (R.A. = 22h 34m 29.31s, Decl. = +55o 29' 03.6", J2000.0, R = 16.23 - 16.66 mag, Min. I = HJD 2454387.35273 + 0.387245 x E) and the new EA type eclipsing binary HKV6 Lac = CzeV138 = USNO-B1.0 1455-0409516 (R.A. = 22h 34m 16.26s, Decl. = +55o 34' 24.1", J2000.0, R = 14.10 - 14.23 mag, Min. I = HJD 2454387.58563 + 1.105815 x E) and the new EA type eclipsing binary HKV7 Lac = CzeV139 = USNO-B1.0 1455-0409575 (R.A. = 22h 34m 21.44s, Decl. = +55o 30' 13.8", J2000.0, R = 13.52 - 13.78 mag, Min. I = HJD 2454373.28108 + 1.324325 x E) have been found near the variable star OP Lac by 0.40-m f/5 reflector at Hradec Králové observatory. Simbad object(s): USNO-B1.0 1454-0411281, USNO-B1.0 1455-0409516, USNO-B1.0 1455-0409575, | comments: 0 |
| | 0098 | Chromospherically active stars in the ASAS-3 database: Paper 1. 25 new variables
1744 kB | Klaus Bernhard, Clemens Bernhard, Michael Bernhard | | 2009-02-11 | | | 25 new chromospherically active stars are presented, which were found in the ASAS-3 database: GSC 09500-00821, GSC 09390-00322, GSC 09473-00014, GSC 09486-00927, GSC 09356-01284, GSC 09384-01942, GSC 09411-01577, GSC 09442-01129, GSC 09444-02266, GSC 09288-00744, GSC 09235-01702, GSC 09214-00531, GSC 09338-02016, GSC 09275-02349, GSC 08906-00808, GSC 09034-00643, GSC 08923-01147, GSC 08950-00019, GSC 08933-01802, GSC 09014-00118, GSC 09031-04159, GSC 08983-00564, GSC 09010-04839, GSC 08870-00372, GSC 05275-00646 Simbad object(s): GSC 09384-01942, GSC 09356-01284, GSC 09486-00927, GSC 09034-00643, GSC 08906-00808, GSC 09275-02349, GSC 09338-02016, GSC 09214-00531, GSC 09235-01702, GSC 09473-00014, GSC 09390-00322, GSC 09500-00821, GSC 09288-00744, GSC 09444-02266, GSC 09442-01129, GSC 09411-01577, GSC 08923-01147, GSC 08950-00019, GSC 08933-01802, GSC 09014-00118, ... | comments: 0 |
| | 0097 | BAV-Results of observations
57 kB | Joachim Hübscher, Hans-Mereyntje Steinbach, Frank Vohla, Frank Walter | | 2009-01-01 | | | This 62nd compilation contains the results of visual observations of BAV-members from the years 2007 and 2008. Here we publish altogether 337 minima and maxima of 201 eclipsing binaries, pulsating and eruptive stars. The data were acquired by 14 observers. The compilation contains also one photographic- and two ccd-results. Simbad object(s): SV Vul, V Vul, R Vul, SU Vir, RS Vir, R Vir, V UMi, U UMi, V And, S UMi, RZ UMa, RY UMa, RS UMa, Z UMa, X UMa, T UMa, S UMa, R UMa, R Tri, TU Tau, ... | comments: 0 |
| | 0096 | Observations of the cataclysmic variable SDSS J081321.91+452809.4
314 kB
appendix: Photometric data 21 kB
| Jeremy Shears, Ian Miller and Steve Brady | | 2008-12-10 | | | Our observations of the first reported outburst of SDSS J081321.91+452809.4 during 2008 April show that this cataclysmic variable is a dwarf nova. The outburst amplitude was at least 3.1 magnitudes and the outburst appears to have been rather short-lived at around 3 days with a rapid decline to quiescence of 0.73 mag/day. Simbad object(s): SDSS J081321.91+452809.4, | comments: 0 |
| | 0095 | Proceedings of the 39th Conference on Variable Stars Research
10833 kB | L. Brát, M. Spurny, M. Krizek, R. Hudec, J. Zicha, M. Nekola, T. Dorokhova, P. A. Dubovsky, I. Kudzej, N. Dorokhov, A. Ryabov, P. Švaříček, M. Chrastina, F. Hroch, V. Šimon, L. Hudec, F. Munz, S. Parimucha, Ľ. Hambálek, A. Skopal, R. Slošiar, P. Zasche, S. Poddaný | | 2008-11-22 | | | Alternative Solution for an Low-Cost Optical All-Sky Monitor, The beginning of asteroseismological observations at Kolonica Saddle, The Binary Stars With Pulsating Component, CCD Photometry: Measurement uncertainity, ESA Gaia and Variable Objects, Identification and Analyses in Optical Light of Gamma-ray Sources with Astronomical Archival Plates, Superhumps in Kolonica, New Variables In Archival CCD Fields, Objects of High Energy Astrophysics as Optically Variable Objects, On the light curves of symbiotic stars, On the Possibility of the Amateur Detection of GRBs by Ionospheric Response, Optical Photometry of Be/X-ray Binary V 615 Cas = LS I +61°303, Recommended tips for variable stars observers, Transiting Explanet Light Curve Solution by Phoebe Code Simbad object(s): HD 177863, V2314 Oph, VW Ari, TrES-1 b, WASP-2 b, V2083 Cyg, V2388 Oph, V 819 Her, DN UMa, V1031 Ori, V 592 Per, V 773 Cas, V 348 And, V 615 Cas, GRB 060124A, CI Cyg, AX Per, V1329 Cyg, BF Cyg, AG Dra, ... | comments: 0 |
| | 0094 | B.R.N.O. Times of minima
486 kB
appendix: 626 minima timings 57 kB
| L. Brát, L. Šmelcer, H. Kučáková, R. Ehrenberger, R. Kocián, F. Lomoz, L. Urbančok, P. Svoboda, J. Trnka, P. Marek, R. Dřevěný, R. Uhlář, S. Poddaný, P. Zasche, M. Skarka | | 2008-11-13 | | | Paper presents observations of eclipsing binaries acquired by the Variable Star Section of Czech Astronomical Society members (B.R.N.O. group). Paper contains 626 minima timings for 272 eclipsing binaries, obtained by 36 observers during 2007 – 2008 period. Simbad object(s): AB And, GK And, LY And, QW And, QX And, RT And, V 404 And, V 441 And, V 449 And, XZ And, GSC 1077-0828, OO Aql, V 724 Aql, V 889 Aql, V1426 Aql, CL Aur, EM Aur, HL Aur, HP Aur, IM Aur, ... | comments: 1 |
| | 0093 | New Elements For RR Lyrae and CW stars
1880 kB | Sebastián A. Otero | | 2008-10-22 | | | This research presents elements for 95 RR Lyrae and CW variables listed in the GCVS and NSV catalogues that had wrong or unpublished periods. The data used for the analysis come from the publicly available ASAS-3 and NSVS databases. New identifications are given for the RRAB stars EU Tel, ST Tel and NSV 11178. Simbad object(s): HV 11916, UW Phe, ET Cep, AT Hyi, NSV 1434, NSV 1603, SON 4029, AN 399.1934, NSV 3908, LT Car, SY Pyx, NSV 4650, NSV 4680, NSV 4683, OR Car, NSV 5019, EV Hya, HV 8415, AZ Cha, NSV 6625, ... | comments: 1 |
| | 0092 | Chromospherically active stars in the ROTSE-1 database:Paper 3. Another 25 new variables.
1727 kB | Klaus Bernhard, Christopher Lloyd | | 2008-10-22 | | | Abstract: Another 25 new chromospherically active stars are presented, which were found in the ROTSE-1 database: GSC 05090-00118, GSC 01433-01056, GSC 01442-01289, GSC 03239-00610, GSC 00604-00254, GSC 02121-00729, GSC 02991-00890, GSC 02747-01337, GSC 01094-00792, GSC 02769-00149, GSC 03139-01710, GSC 01104-00245, GSC 04723-00878, GSC 02482-00745, GSC 00132-01109, GSC 01191-01566, GSC 02107-00188, GSC 02744-01935, GSC 00359-00677, GSC 02479-00944, GSC 00114-00296, GSC 05050-00802, GSC 05215-00136, GSC 01331-01211, GSC 02788-00248 Simbad object(s): GSC 05090-00118, GSC 01433-01056, GSC 01442-01289, GSC 03239-00610, GSC 00604-00254, GSC 02121-00729, GSC 02991-00890, GSC 02747-01337, GSC 01094-00792, GSC 02769-00149, GSC 03139-01710, GSC 01104-00245, GSC 04723-00878, GSC 02482-00745, GSC 00132-01109, GSC 01191-01566, GSC 02107-00188, GSC 02744-01935, GSC 00359-00677, GSC 02479-00944, ... | comments: 0 |
| | 0091 | New and Confirmed Eclipsing Binaries In the ASAS-3 and NSVS Databases
2891 kB | Sebastián A. Otero | | 2008-08-18 | | | This research presents a list of elements for 120 eclipsing binaries using data from the ASAS-3, NSVS and Hipparcos databases. Some of the systems studied are new and others are confirmed or had wrong elements in the literature. Simbad object(s): HD 185990, TYC 479-253-1, GSC 6889-0302, GSC 6880-1632, CD-37 12814, ZZ CrA, GSC 4442-1114, GSC 4222-0613, GSC 4429-0655, GSC 4428-1044, V451 Sco, SON 8681, NSV 9626, HD 160632, NSV 9555, AI Pav, GSC 4421-1708, GSC 4577-0707, NSV 8300, LY Nor, ... | comments: 0 |
| | 0090 | The 2008 February superoutburst of V452 Cas
83 kB
appendix: Finding chart and sequence for V452 Cas 382 kB
appendix: 2008 Feb superoutburst photometry 0 kB
appendix: vsnet-alert 3707 21 kB
| C. Lloyd, R. Pickard, J. Shears, I. Miller, D. Boyd, S. Brady | | 2008-08-01 | | | Observations of the 2008 February outburst of V452 Cas show that the profile, duration and magnitude at maximum were very similar to the previous superoutburst in 2007 September. Low-amplitude variations consistent with previously observed superhumps were also seen. Simbad object(s): V452 Cas, | comments: 0 |
| | 0089 | Another 25 new chromospherically active stars in the ROTSE-1 database – numbers 26 - 50
1499 kB | Klaus Bernhard, Christopher Lloyd | | 2008-05-14 | | | Abstract: Another 25 new chromospherically active stars are presented, which were found in the ROTSE-1 database: GSC 03189-00408, GSC 02727-01789, GSC 00562-01405, GSC 01684-01956, GSC 02587-00902, GSC 01108-01066, GSC 01939-00467, GSC 00580-01188, GSC 01746-01812, GSC 02624-02515, GSC 01546-01938, GSC 01101-00607, GSC 02760-00635, GSC 01543-00131, GSC 01676-01765, GSC 01656-01714, GSC 02612-01778, GSC 00346-00400, GSC 05011-00274, GSC 03042-00255, GSC 05253-00748, GSC 00258-00148, GSC 02172-01415, GSC 00341-00005, GSC 03262-01217 Simbad object(s): GSC 03262-01217, GSC 00341-00005, GSC 02172-01415, GSC 00258-00148, GSC 05253-00748, GSC 03042-00255, GSC 05011-00274, GSC 00346-00400, GSC 02612-01778, GSC 01656-01714, GSC 01676-01765, GSC 01543-00131, GSC 02760-00635, GSC 01101-00607, GSC 01546-01938, GSC 02624-02515, GSC 01746-01812, GSC 00580-01188, GSC 01939-00467, GSC 01108-01066, ... | comments: 0 |
| | 0088 | 108 New Variable Stars in the NSVS Database
424 kB
appendix: Elements 18 kB
appendix: Cross-IDs 5 kB
| Maxim Usatov, Artem Nosulchik | | 2008-05-08 | | | In this paper we present 105 SR+L, 1 Orion T Tau and 2 RS CVn type variable stars found in the Northern Sky Variability Survey (NSVS) database. This work is designated to complement and finalize our previous publication of the Extended Catalog of Red AGB Variable Stars found in the NSVS database as is primarily designated to find SR+L stars. While the previous work employed the AOV ratio cutoff at >1.6 to pick stars showing slow variability pattern, we have manually processed all the remaining objects originally filtered out by the smaller AOV ratio and picked the ones with light curves showing obvious variability pattern. All the stars presented have no identification in General Catalogue of Variable Stars, SIMBAD and VSX databases thus most likely the stars presented are new discoveries. Simbad object(s): 2MASS J20433466-0736475, 2MASS J17470357-1237151, 2MASS J17372172-0940359, 2MASS J08262938-1927037, 2MASS J05520873-2208100, 2MASS J05432701-0959375, 2MASS J20100180+0238133, 2MASS J20013484+0459252, 2MASS J20083061-0245583, 2MASS J19574292-0145397, 2MASS J19081342-0612469, 2MASS J18301526+0702188, 2MASS J18245505-0057143, 2MASS J18141768-0104597, 2MASS J18113558-0219464, 2MASS J17593613-0125033, 2MASS J17573307-0336121, 2MASS J17530373+0342451, 2MASS J08405392-0509358, 2MASS J05581071-0255185, ... | comments: 0 |
| | 0087 | The Extended Catalog of Red AGB Variable Stars found in the NSVS Database
341 kB
appendix: Catalogue - Elements 142 kB
appendix: Catalogue - USNO-A2.0 and SIMBAD Cross-IDs 35 kB
appendix: Light Curves 1676 kB
appendix: Readme file for supplemental analysis data 0 kB
| Maxim Usatov, Artem Nosulchik | | 2008-04-24 | | | In this paper we present the catalog of new Mira-type and SR+L variable stars in the Northern Sky Variability Survey (NSVS) database, found after complementing the original NSVS object tables with a number of additional parameters. By extending the amount of criterias search queries can take advantage of and filtering known objects out, it became convenient to apply better constrained filters to search new variable star candidates. As an example of presented approach, the quest for red variables has resulted in 78 Mira-type and 717 SR+L stars found that have no identification in General Catalogue of Variable Stars, SIMBAD and VSX databases. Most likely the stars presented are new discoveries. The classification of these stars is based on the near-infrared colors from Two Micron All Sky Survey (2MASS) photometry, amplitude and period with the accuracy of the classification given ~90%, estimated basing on the current GCVS classification scheme. Simbad object(s): 2MASS J20142023+4822329, 2MASS J20313483+3750093, 2MASS J20262196+4338290, 2MASS J19550744+4301272, 2MASS J19441583+4348390, 2MASS J19364302+4415479, 2MASS J20052552+4937020, 2MASS J20022983+4926589, 2MASS J19594369+5143000, 2MASS J19555052+4817060, 2MASS J19520386+5030178, 2MASS J19435937+4822180, 2MASS J19294522+4903522, 2MASS J19330349+4935499, 2MASS J19364459+4256002, 2MASS J19342559+4420580, 2MASS J19285699+4223547, 2MASS J19195776+4209046, 2MASS J19153541+3848152, 2MASS J19165404+4330121, ... | comments: 0 |
| | 0086 | 25 new chromospherically active stars in the ROTSE-1 data base
1568 kB | Klaus Bernhard, Christopher Lloyd | | 2008-03-26 | | | 25 new chromospherically active stars are presented, which were found in the ROTSE-1 data base: GSC 4721-00552, GSC 2518-00781, GSC 2628-01345, GSC 164-01162, GSC 3345-01977, GSC 3525-01869, GSC 2912-01219, GSC 115-00801, GSC 3333-00117, GSC 1979-00569, GSC 1291-00887, GSC 2229-00611, GSC 105-00869, GSC 63-00006, GSC 5253-00472, GSC 2339-01230, GSC 4920-01189, GSC 1164-00392, GSC 1756-00430, GSC 2276-00205, GSC 2280-00897, GSC 234-00306, GSC 4912-01357, GSC 612-00169, GSC 1935-01066 One of these variables (No.4: GSC 164-01162) is a new long-period eclipsing RS CVn variable. Simbad object(s): GSC 1935-01066, GSC 612-00169, GSC 4912-01357, GSC 234-00306, GSC 2280-00897, GSC 2276-00205, GSC 1756-00430, GSC 1164-00392, GSC 4920-01189, GSC 2339-01230, GSC 5253-00472, GSC 63-00006, GSC 105-00869, GSC 2229-00611, GSC 1291-00887, GSC 1979-00569, GSC 3333-00117, GSC 115-00801, GSC 2912-01219, GSC 3525-01869, ... | comments: 0 |
| | 0085 | The 2007 August outburst of AW Sge
101 kB
| Lloyd C., Pickard R.D. | | 2008-03-17 | | | CCD observations of the normal outburst of AW Sge in 2007 August were taken over four days covering the whole outburst. The magnitude at maximum was probably V = 14.5 and the outburst lasted little more than two days, with the star being visible above the typical discovery limit of V = 15 for about 18 hours. Simbad object(s): AW Sge, | comments: 0 |
| | 0084 | The Correlations Between the Parameters of the Sharpness of the Light Curve and Period for Miras
201 kB | Ivan Andronov, Larisa Kudashkina | | 2008-03-14 | | | We have considered the dependence of the sharpness of the mean light curves of Mira-type stars on the period. The correlation coefficients and regression lines have been calculated. We have derived the variations of the mean light curve depend on variations of the ascending branch versus period only. Simbad object(s): RT Cyg, R Vir, R Vul, RZ Sco, S Car, SS Cas, SS Her, T Her, V Tau, W Lyr, X Cam, R Ari, RR Boo, X Aur, SY Her, W Pup, BG Cyg, R Aql, R Boo, R Dra, ... | comments: 0 |
| | 0083 | New eclipsing binaries found in the NSVS database II
2770 kB | Sebastian A. Otero | | 2008-02-27 | | | A search for eclipsing binaries in the NSVS database resulted in the discovery of 116 new such systems and the improvement or confirmation of the elements and types of other four. Simbad object(s): TYC 3669-1165-1, GSC 04610-00904, GSC 04614-00887, GSC 04606-00340, GSC 04491-00535, GSC 04490-00777, GSC 04482-00981, GSC 04482-00673, GSC 04478-00658, GSC 04606-01601, GSC 02755-02136, GSC 04481-00080, GSC 04278-01180, TYC 4481-1535-1, GSC 04601-00559, GSC 04605-01469, GSC 04485-00988, GSC 04613-00149, GSC 04477-00706, TYC 4485-1061-1, ... | comments: 0 |
| | 0082 | Reclassification of ROTSE-1 Cepheids: 18 new chromospherically active stars
1343 kB | Bernhard, K., Lloyd, C. | | 2008-02-19 | | | 18 new chromospherically active stars are presented, which were previously identified as Cepheids: GSC 978-01306, GSC 966-00193, GSC 1541-00191, GSC 2058-00642, GSC 2.2 N022132016439, GSC 2598-01430, GSC 2557-01181, GSC 2560-00711, GSC 2541-00338, GSC 2636-00533, GSC 2617-01977, GSC 2579-00167, GSC 3021-00206, GSC 3062-01317, GSC 3130-01158, GSC 3527-00201, GSC 3106-00264, GSC 3115-01770 Simbad object(s): GSC 3115-01770, GSC 3106-00264, GSC 3527-00201, GSC 3130-01158, GSC 3062-01317, GSC 3021-00206, GSC 2579-00167, GSC 2617-01977, GSC 2636-00533, GSC 2541-00338, GSC 2560-00711, GSC 2557-01181, GSC 2598-01430, GSC 2.2 N022132016439, GSC 2058-00642, GSC 1541-00191, GSC 966-00193, GSC 978-01306, | comments: 0 |
| | 0081 | New Variable Stars in the NSVS database
227 kB | Maxim Usatov | | 2008-02-08 | | | A search in the NSVS database resulted in the discovery of new variable stars. The aim of this paper is to present and classify the stars found. Simbad object(s): USNO-A2.0 1575-04862771, USNO-A2.0 1275-02298343, USNO-A2.0 1425-09199634, USNO-A2.0 1425-06157042, USNO-A2.0 1575-04648021, USNO-A2.0 1575-04362850, USNO-A2.0 0975-05318851, USNO-A2.0 1275-02147552, USNO-A2.0 1425-09697449, USNO-A2.0 1425-04706112, USNO-A2.0 1425-06208857, USNO-A2.0 1500-03443029, USNO-A2.0 1350-01683813, USNO-A2.0 1500-07111604, USNO-A2.0 1425-07032818, USNO-A2.0 1650-00555686, USNO-A2.0 0975-19106140, USNO-A2.0 1125-18619564, USNO-A2.0 1425-05258645, USNO-A2.0 1500-09216800, ... | comments: 0 |
| | 0080 | Three new variable stars in the field of the RR Lyrae star GY Peg
506 kB
appendix: Data for HMB11 378 kB
appendix: Data for HMB12 323 kB
appendix: Data for HMB13 261 kB
| F.-J. HAMBSCH, J. VANDENBROERE | | 2008-02-05 | | | Three new variable stars (HMB11 = USNO-B1.0 1249-0502361, HMB12 = USNO-B1.0 1250-0498893 and HMB13 = USNO-B1.0 1251-0501729) have been identified in the field of the RR Lyrae variable star GY Peg. Full light curves for all the three stars are presented. The form of the light curve indicates that two of the stars (HMB11 and HMB12) are EW type variable stars and the third star (HMB13) is an RRab type RR Lyrae variable star. For HMB11 a period P = 0. 31875 +/- 0.00005 [d] with the epoch E0 = HJD 2454333.747 and an amplitude of the light variation of delta m = 0.20 +/- 0.05 mag. has been found. For HMB12 a period P = 0. 27810 +/- 0.00005 [d] with the epoch E0 = HJD 2454340.720 and an amplitude of the light variation of delta m = 0.15 +/- 0.05 mag. has been found. And finally for HMB13 a period P = 0. 6278 +/- 0.0002 [d] with the epoch E0 = HJD 2454340.774 and an amplitude of the light variation of delta m = 0.75 +/- 0.02 mag. has been found. Simbad object(s): USNO-B1.0 1251-0501729, USNO-B1.0 1250-0498893, USNO-B1.0 1249-0502361, | comments: 0 |
| | 0079 | Discovery of a New Variable Star GSC2.3 N2X9042559
108 kB
appendix: The paper in LaTeX format 5 kB
appendix: Close vicinity of the variable 1740 kB
appendix: Light curve of the variable 108 kB
appendix: Photometric data for GSC2.3 N2X9042559 7 kB
| Strigachev, Anton, Bachev, Rumen, Semkov, Evgeni | | 2008-01-23 | | | We report on the discovery of a new variable star GSC2.3 N2X9042559. The shape of the light curve and the derived period lead us to the preliminary conclusion that this star is a close binary of EW type with ephemeris HJD Min(R) = 2454332.478(+/-0.002) + 0.3616(+/-0.0002)*E and R magnitude range 15.3-15.8. Simbad object(s): GSC 2.3 N2X9042559, | comments: 0 |
| | 0078 | New long-period RS CVn variables in the NSVS database
246 kB
appendix: GSC924-356 data 8 kB
| Bernhard, K. | | 2008-01-06 | | | 9 new long-period RS CVn variables are presented, which were discovered during a programme of optical identification of ROSAT X-ray sources: GSC 0608-1004, GSC 3335-1727, GSC 4116-0276, GSC 3448-0105, GSC 4388-1284, GSC 3456-2059, GSC 0924-0356, GSC 0969-1638, GSC 3557-0919 Simbad object(s): GSC 3557-0919, GSC 0969-1638, GSC 0924-0356, GSC 3456-2059, GSC 4388-1284, GSC 3448-0105, GSC 4116-0276, GSC 3335-1727, GSC 0608-1004, | comments: 0 |
| | 0077 | Photometric Study of the Light Curve of the Early Type Binary V1898 Cyg
718 kB | Acerbi Francesco & Barani Carlo | | 2007-12-26 | | | The photoelectrical (BV)lightcurve of the eclipsing binary V1898 Cyg obtained by Dallaporta & Munari (2006) are here analyzed. The Wilson-Devinney Differential Correction program was used in the analysis and the results shows that the star is a semi-detached system with the secondary component that accurately fills its Roche lobe. The best fit was obtained at photometric mass ratio q = 0.3018 and inclination i = 70° Simbad object(s): V1898 Cyg, | comments: 3 |
| | 0076 | Measuring the Period of the δ Scuti Variable U1425-01208594 In Cassiopeia
368 kB
appendix: Photometric data for USNO-A2.0 1425-01208594 106 kB
| Jeremy Shears, David Boyd, Steve Brady, Ian Miller, Roger Pickard | | 2007-11-29 | | | The variability of U1425-01208594 was recently discovered by Schmidtobreick et al (2003), who suggested that it is a member of the δ,, Scuti family of pulsating stars. Photometry conducted by the authors revealed a period of 0.06695(8) d and a peak-to-peak amplitude of 0.014 mag. Simbad object(s): USNO-A2.0 1425-01208594, | comments: 0 |
| | 0075 | Proceedings of the 38th Conference on Variable Stars Research
2097 kB | L. Brát, R. Hudec, V. Šimon, I. Kudzej, P. A. Dubovský, T. Dorokhova, N. Dorokhov, N. Koshkin, Š. Parimucha, A. Ryabov, M. Vadila, F. Munz, J. Štrobl, C. Bartolini, A. Guarnieri, A. Piccioni, D. Hanžl, P. Sobotka, P. Škoda | | 2007-11-03 | | | Astronomical Plate Archives and Amateur Variable Stars Researchers, The ESA Gaia Mission and Variable Stars, First Results of CCD and Photoelectric Photometry on Astronomical Observatory at Kolonica Saddle, How Can Amateur Astronomers and Small Observatories Contribute to Recent Astrophysics, Investigation of Cataclysmic variables and related objects with the INTEGRAL satellite, Photometry of the X-ray transient CI Cam – opportunity for CCD observers, Reliability of the INTEGRAL OMC optical data, The Virtual Observatory and its Benefits for Amateur Astronomers, Visual and CCD observing of cataclysmic variables and related objects Simbad object(s): V Sge, KV UMa, CH UMa, DO Dra, QR And, GS Gem, V1011 Cyg, CI Cam, RS Oph, IX Vel, GK Per, V2400 Oph, V1432 Aql, V1223 Sgr, Mark 501, Mark 421, OJ 287, ON 231, OQ 530, PKS0420-014, ... | comments: 0 |
| | 0074 | B.R.N.O. Contributions #34
424 kB
appendix: 2327 times of minima for 656 EBs 178 kB
| Brát L., Zejda M., Svoboda P. | | 2007-10-25 | | | Paper presents observations of eclipsing binaries acquired by the Variable Star Section of Czech Astronomical Society members (B.R.N.O. group). Paper contains 2327 minima timings for 656 eclipsing binaries, obtained by 127 observers during 2000 – 2007 period. Simbad object(s): USNO-A2.0 1050-17578119, HD 350731, HD 171055, GSC 0244-0434, BD+56 704, TYC 2750-854-1, GSC 1129-1457, HD 252984, GSC 3983-1532, USNO-A2.0 1350-1727153, GSC 3983-0544, GSC 0196-0894, GSC 0196-0699, GSC 4420-1984, GSC 4232-2830, HD 226957, GSC 3612-1565, GSC 3576-0170, GSC 3021-0057, GSC 2533-0370, ... | comments: 0 |
| | 0073 | A list of minima and maxima timings
141 kB
appendix: Measurements of RZ Crv 25 kB
| Anton Paschke | | 2007-10-25 | | | The list contains minima of eclipsing and maxima of pulsatings stars, it continues the list published in OEJV 0048. Simbad object(s): GSC 02850-01075, NSV 00001, MN TrA, TY Tau, CX Ser, V487 Sco, V675 Sgr, V440 Sgr, YY Sgr, GSC2.2 N033031028158, GSC2.2 N033031026576, BX Peg, ZZ Peg, EG Ori, NSV 07748, V2298 Oph, V710 Oph, V709 Oph, V509 Oph, V487 Oph, ... | comments: 1 |
| | 0072 | New Elements for 54 Eclipsing Binaries
3617 kB | Sebastián A. Otero | | 2007-10-14 | | | This research presents new elements for 54 eclipsing binaries found using data from the ASAS-3, Hipparcos and NSVS databases. Some of the systems studied are new and others are confirmed or had wrong elements in the literature. The discovery of apsidal motion in TZ Pyx is presented and an identification problem with CPD-41 7746 in NGC 6231 is addressed. Conspicuous BE-variability superposed to eclipsing variations is discovered in HD 61407. Simbad object(s): HD 326334, HD 326319, HD 152291, V3903 Sgr, AF Gru, V1905 Cyg, V1901 Cyg, HD 199587, BP Del, HD 188942, V2094 Cyg, BN Dra, NSV 11763, HD 174344, NSV 10625, CCDM J18061-2412AB, V1090 Sco, CPD-41 7746, V712 Her, HD 143156, ... | comments: 1 |
| | 0071 | CCD Photometry of the Short-period Eclipsing RS CVn Variable GSC 2038.0293
76 kB | Frank, P. , Bernhard, K. | | 2007-10-10 | | | GSC 2038.0293 is an eclipsing RS CVn variable, which has been discovered in the ROTSE1 database. BVR and unfiltered observations showed a further decline of starspot activity in 2007, which is in good agreement with a suggested cyclic variation of 6-8 years. Despite the low mean starspot activity we noticed considerable changes of starspot activity on timescales of a few weeks. Simbad object(s): GSC 2038-0293, | comments: 0 |
| | 0070 | Minima of long period eclipsing stars
67 kB
appendix: Data for UU Cas 11 kB
appendix: Data for EK Cas 11 kB
appendix: Data for RS Cep 17 kB
appendix: Data for EX Cep 13 kB
appendix: Data for KL Cep 18 kB
| Boër M, Klotz A, Paschke A | | 2007-10-10 | | | This is the first of a planned seria of minima lists. It contains only five stars, UU Cas, EK Cas, RS Cep, EX Cep, KL Cep. Simbad object(s): KL Cep, EX Cep, RS Cep, EK Cas, UU Cas, | comments: 0 |
| | 0069 | The outburst history of AW Sge
166 kB | Christopher Lloyd | | 2007-10-09 | | | A review of the outbursts of AW Sge suggest that the outburst interval is 286+/-28 days, which is much shorter than previously thought. The normal outbursts last less than 3 days and usually reach magnitude 14.5. The superoutbursts are about half a magnitude brighter and last about 8 days. A previously unrecognised superoutburst has been identi ed from 1961. Simbad object(s): AW Sge, | comments: 0 |
| | 0068 | Two bright eclipsing binaries solved with the help of visual observations
167 kB | Sebastián A. Otero, Pavol A. Dubovský, Federico Claus | | 2007-09-26 | | | Visual observations of V975 Cen and NSV 15737 were combined with photometric data from the Hipparcos and ASAS databases to determine the elements for these eclipsing binaries. V975 Cen is an Am+F binary in an extremely eccentric orbit with elements HJD 2454217.582 (±0.080) + 135.9255 (±0.0015) x E. NSV 15737 is an EA-system made up of very different components with elements HJD 2454329.479 (±0.001) + 8.161235 (±0.000001) x E. Simbad object(s): NSV 15737, V975 Cen, | comments: 0 |
| | 0067 | Two new variable stars in the field of the Transiting Extrasolar planet TRES-1 (GSC 2652-1324)
1432 kB
appendix: Data for HMB09 150 kB
appendix: Data for HMB10 158 kB
appendix: Data for Pej025 158 kB
| F.-J. HAMBSCH | | 2007-09-12 | | | Two new variable stars (HMB09 = USNO-B1.0 1265-0306001 and HMB10 = USNO-B1.0 1267-0324775) have been identified in the field of the host star of the transiting Extrasolar planet TRES-1 (GSC2652-1324). The third star showing variability is already known under the abbreviation Pej025 = IBVS 5700-40 as found in the VSX database of the AAVSO. Full light curves for all the three stars are presented. The form of the light curve indicates that all the three stars are EW type variable stars. For HMB09 a period P = 0.579289 +/- 0.000056 [d] with the epoch E0 = HJD 2454249.977 and an amplitude of the light variation of dm = 0.400 +/- 0.005 mag. has been found. For HMB10 a period P = 0.337262 +/- 0.000037 [d] with the epoch E0 = HJD 2454249.940 and an amplitude of the light variation of dm = 0.25 +/- 0.05 mag. has been found. And finally for Pej025 a period P = 0.300374 +/- 0.000021 [d] with the epoch E0 = HJD 2454249.495 and an amplitude of the light variation of dm = 0.30 +/- 0.02 mag. has been found. For the latter the period has been significantly improved compared to the one given in VSX. Simbad object(s): GSC2 N030320055368, USNO-B1.0 1267-0324775, USNO-B1.0 1265-0306001, | comments: 0 |
| | 0066 | Lost RR Lyrae stars in Apus
55 kB
appendix: Observation of SW Aps 18 kB
appendix: Observation of TT Aps 18 kB
appendix: Close vicinity of UV Aps 20 kB
appendix: Observation of UV Aps 9 kB
appendix: Observation of VW Aps 11 kB
| Anton Paschke | | 2007-09-04 | | | The stars discussed here are all located in the constallation Apus and have not been observed since their discovery. They all are too faint to be recorded by the All Sky Automated Survey. Observations made in June 2007 with the 50 cm telescope and ST-7 camera on the Hakos IAS observatory in Namibia are reported. Simbad object(s): SW Aps, TT Aps, UV Aps, UX Aps, VW Aps, | comments: 0 |
| | 0065 | CCD photometry of CF Tuc and a note on the orbital period
135 kB | J.L. Innis, D.W. Coates, T.G. Kaye | | 2007-07-23 | | | CF Tuc is a far–southern example of an RS CVn–type eclipsing binary. The orbital period of just under 2.8 d is known to be variable, although the reasons for this variation are not clear. A small number of CCD observations of CF Tuc were obtained at the Brightwater Observatory in 2006 September–November. While phase cover was incomplete, a primary minimum was well observed. This time of minimum indicates that the period has been constant since 1995, and hence that the period change predicted to occur sometime after 1999 has not taken place. We derive an updated ephemeris of HJD 2453994.140 (± 0.005) + 2.797481 (± 0.000008) × E, where E is the cycle number. Simbad object(s): CF Tuc, | comments: 0 |
| | 0064 | Three new variable stars in the field of the RR Lyrae star AK Gem
1472 kB | F.-J. HAMBSCH | | 2007-05-23 | | | Three new variable stars (HMB06 = USNO-B1.0 1035-0121819, HMB07 = USNO-B1.0 1036-0121306 and HMB08 = USNO-B1.0 1035-0121640) have been identified in the field of the RR Lyrae type variable AK Gem. Full light curves for all the three stars are presented. The form of the light curve indicates that all the three stars are EW type variable stars. For HMB06 a period P = 0.32667 +/- 0.00012 [d] with the epoch E0 = HJD 2454155.699 and an amplitude of the light variation of dm = 0.6 +/- 0.1 mag. has been found. For HMB07 a period P = 0.53284 +/- 0.00017 [d] with the epoch E0 = HJD 2454155.683 and an amplitude of the light variation of dm = 0.45 +/- 0.05 mag has been found. And finally for HMB08 a period P = 0.43257 +/- 0.00024 [d] with the epoch E0 = HJD 2454155.742 and an amplitude of the light variation of dm = 0.25 +/- 0.1mag. has been found. Simbad object(s): USNO-B1.0 1035-0121640, USNO-B1.0 1036-0121306, USNO-B1.0 1035-0121819, | comments: 0 |
| | 0063 | GI Aqr Is RRab Type Star
397 kB | Petr Sobotka | | 2007-05-16 | | | Observations by INTEGRAL Optical Monitoring Camera (OMC) showed, that the GI Aqr is not an eclipsing binary of EB type as given by GCVS. Based on CCD V-filtered observations, GI Aqr is pulsating RRab type star. To determine new light elements also ROTSE and ASAS-3 data were used. P=0.6097 ± 0.0003 days, T0(max) = 2451314.7593. Simbad object(s): GI Aqr, | comments: 0 |
| | 0062 | GSC00008-00901 - New Discovered Eclipsing Binary
128 kB | Stefan Parimucha | | 2007-04-15 | | | Discovery of new eclipsing binary GSC00008-00901 is reported. It is the most probably W UMa type binary with period 0.28948+-11 days. The shapes of the light curves indicate presence of one or more spots on the surface of the components. Simbad object(s): DV Psc, GSC 00008-00901, | comments: 0 |
| | 0061 | Two new variable stars in the field of the RR Lyrae star MW Lyr
953 kB | F.-J. HAMBSCH | | 2007-03-08 | | | Two new variable stars (HMB04 = USNO A2 1200 09129739 = USNO B1.0 1219-0327636 and HMB05 = USNO A2 1200 09130700 = USNO B1.0 1218-0322538) have been identified in the field of the RR Lyrae type variable MW Lyr. A full light curve for the star HMB04 = USNO A2 0900 02059141 = USNO B1.0 1219-0327636 is presented, which also indicates that this star is an EW variable star. The other star’s type and light curve are so far undetermined. For HMB04 a period P = 0.23087 +/- 0.00044 [d] with the epoch E0 = JD 2453930.7448 and a variation of Dm = 0.8 +/- 0.1 mag. has been found. Simbad object(s): USNO-B1.0 1219-0327636, USNO-B1.0 1218-0322538, | comments: 0 |
| | 0060 | Visual Minima Timings of Eclipsing Binaries Observed in the Years 1992 - 1996
157 kB | Petr Molik | | 2007-03-06 | | | The paper contains a list of 283 new times of minima and 77 revised times of minima for 63 eclipsing binaries derived by the author from his visual observations. Simbad object(s): RT And, TW And, CO And, HV Aqr, V346 Aql, TT Aur, WW Aur, AR Aur, UW Boo, CV Boo, SV Cam, RZ Cas, TV Cas, TW Cas, BZ Cas, MM Cas, U Cep, XX Cep, XZ Cep, ZZ Cep, ... | comments: 0 |
| | 0059 | New and confirmed RR Lyrae variables found in the NSVS and ASAS-3 databases
932 kB | Sebastián A. Otero | | 2007-02-23 | | | A search for variable stars in the NSVS and ASAS-3 databases resulted in the discovery or confirmation of fifteen pulsating variables of the RR Lyrae type. Simbad object(s): GSC 04619-01292, SV* BV 1353, SV* BV 1349, SV* SVS 2667, GSC 04603-00197, SV* BV 1138, SV* HV 10656, GSC 04649-02160, GSC 04656-00461, NSV 11605, NSV 6747, NSV 4438, NSV 4007, GSC 04539-00694, SV* BV 930, | comments: 0 |
| | 0058 | Two New Eclipsing Binary Stars in Field of RV Tri
1381 kB | Martin Lehky, Petr Horalek | | 2007-02-11 | | | The new eclipsing binary HKV2 Tri = CzeV128 Tri = VSX J021331.9+370236 = USNO-B1.0 1270-0034289 (R.A. = 02h 13m 31.95s, Decl. = +37o 02' 36.5", J2000.0, R = 14.1 - 14.4 mag, Min. I = HJD 2454000.4696 + 0.494176 x E) and the new EW type eclipsing binary HKV4 Tri = CzeV130 Tri = VSX J021301.4+370326 = USNO-B1.0 1270-0034104 (R.A. = 02h 13m 01.49s, Decl. = +37o 03' 26.0", J2000.0, R = 14.4 - 15.0 mag, Min. I = HJD 2453999.4197 + 0.295562 x E) have been found near the variable star RV Tri by 0.40-m f/5 reflector at Hradec Králové observatory. Simbad object(s): USNO-B1.0 1270-0034104, USNO-B1.0 1270-0034289, | comments: 0 |
| | 0057 | Three new EW stars in the field of the RR Lyrae star NSV2724 = GSC0125-0449
335 kB | F.-J. Hambsch | | 2007-01-27 | | | Three new EW stars (HMB01 = USNO A2 0900 02059141 = USNO B1.0 0950-0071306, HMB02 = USNO A2 0900 02064661 = USNO B1.0 0950-0071548 and HMB03 = USNO A2 0900 02064201 = USNO B1.0 0948-0071066) have been identified in the field of the RR Lyrae type variable NSV2724 (GSC0125-0449) in Orion. Full light curves for two of the stars are presented. The third stars light curve is not yet fully covered. For HMB01 a period P = 0.6032 +/- 0.0015 [d] with the epoch E0 = JD 2454071.7676 and a variation of Dm = 0.7 mag. has been found. For HMB02 a period P = 0.27872 +/- 0.00025 [d] with the epoch E0 = JD 2454071.8727 and a variation of Dm = 0.4 mag. has been found. And finally for HMB03 a period P = 0.33262 +/- 0.00058 [d] with the epoch E0 = JD 2454080.7679 and a variation of approximately Dm = 0.4 mag. has been found. Simbad object(s): USNO-B1.0 0948-0071066, USNO-B1.0 0950-0071548, USNO-B1.0 0950-0071306, | comments: 2 |
| | 0056 | New and confirmed delta Scuti variables found in the NSVS and ASAS-3 databases
575 kB | Sebastián A. Otero | | 2007-01-27 | | | A search for variable stars in the NSVS and ASAS-3 databases resulted in the discovery or confirmation of five pulsating variables of the DSCT type. Simbad object(s): GSC 03986-01266, HD 154605, GSC 04638-00455, HD 42304, TYC 3733-1115-1, | comments: 0 |
| | 0055 | New Eclipsing Binary Star in Field of OQ Cas
690 kB | Martin Lehký, Petr Horálek | | 2007-01-24 | | | The new EW eclipsing binary star (R.A. = 00h 47m 12.68s, Decl. = +61o 02' 03.4", equinox 2000.0, m = 15.2 - 15.8 mag, P = 0.649435 d) has been found near variable star OQ Cas by 0.40-m f/5 reflector at Hradec Králové observatory. Simbad object(s): USNO-B1.0 1510-0027592, | comments: 2 |
| | 0054 | New and confirmed cepheid variables found in the NSVS and ASAS-3 databases
631 kB | Sebastián A. Otero | | 2006-12-13 | | | A search for variable stars in the NSVS and ASAS-3 databases resulted in the discovery or confirmation of seven pulsating variables of the CW or DCEP types. Simbad object(s): GSC 04613-01113, GSC 01050-00361, NSV 9046, GSC 04547-01890, NSV 3571, GSC 02388-00772, GSC 04621-00688, | comments: 0 |
| | 0053 | SAO 64632: A new variable star in the field of U CrB
81 kB | Violat-Bordonau, F., Violat-Martin, D. | | 2006-11-16 | | | A light curve of the dwarf K star SAO 64632 (BD +32 2572), in the same field as U CrB, is presented in this paper. Data was obtained using the 7.5-cm telescope at the Caceres Astronomical Observatory (Caceres, Spain) equipped with a Starlight Xpress MX516 CCD. The present light curve (in V band) and those obtained by HIPPARCOS (in BT and VT band) are all analyzed: the results show that SAO 64632 is a variable star of low amplitude (almost 0.18 magnitude) with a period near to 9.24 days. Simbad object(s): PPM 78506, LTT 14557, BD +32 2572, HIP 75011, SAO 64632, | comments: 0 |
| | 0052 | CCD photometry of dwarf nova RXSJ053234 during superoutburst in July 2006
681 kB | Parimucha S., Dubovsky P. | | 2006-10-14 | | | In this paper we report CCD observations of the dwarf nova RXSJ053234 during long lasted outburst in July 2006. We found variations of light curve after maximum and we detected superhumps with periodicity 0.05707 +/- 0.0012 days and amplitude about 0.3 mag. Simbad object(s): 1RXS J053234.9+624755, | comments: 0 |
| | 0051 | 30 maximum times of cepheids
175 kB | Ralf Meyer | | 2006-10-11 | | | I report new visual maximum times of classical cepheids and one W-Virginis (CWA-) variable, based on observations of the years 2004 until 2006. Simbad object(s): SZ Aql, FM Aql, PZ Aql, V493 Aql, RT Aur, YZ Aur, | comments: 0 |
| | 0050 | CCD photometry of dwarf nova CI UMa during outburst in July 2006
446 kB | Parimucha S., Dubovsky P. | | 2006-10-11 | | | We present CCD photometry of the dwarf nova CI UMa obtained at Kolonica Observatory during its outburst in July 2006. We detected superhumps with period 0.06226 +/- 0.00012 days and amplitude about 0.3 mag in white light. Simbad object(s): CI UMa, | comments: 0 |
| | 0049 | T Monocerotis: collected maximum times and a new ephemeris
698 kB | Ralf Meyer | | 2006-09-27 | | | The period of this classical cepheid is variable. I give 209 reported times of maximum light and a revised ephemeris. Simbad object(s): T Mon, | comments: 0 |
| | 0048 | Extrema timings of some short-period variable stars
103 kB | Anton Paschke | | 2006-08-17 | | | A list of recently observed minima and maxima. Simbad object(s): GSC 2850-1075, ZZ Sgr, V2298 Oph, V709 Oph, V528 Oph, V448 Oph, V441 Oph, GSC 6686-0470, RT Equ, SX Del, V454 CrA, Y Crv, CL Cir, AQ Cir, VY Cir, RZ Cir, RR Cir, Y Cir, TX Cha, TU Cha, ... | comments: 3 |
| | 0047 | Four More Ross Variables Identified
44 kB | James Bedient | | 2006-08-15 | | | Additional online data has been searched for Ross variables. As a result, four more of Ross’ suspected variables have been identified as red variables, and accurate positions and cross-references determined. Simbad object(s): NSV 13558, NSV 13469, NSV 12676, NSV 11649, | comments: 0 |
| | 0046 | T Vulpeculae: Maximum Times Covering 120 Years Show a Slight, Continuous Period Decrease
695 kB | Ralf Meyer | | 2006-08-04 | | | I give 221 maximum times of the well known classical cepheid T Vulpeculae covering the years 1885 until 2003. A slight, continuous period decrease has been reported and can be demonstrated in the data set. Simbad object(s): T Vul, | comments: 0 |
| | 0045 | New and Confirmed Variables in the Field of Eta Carinae. Discovery of New Massive O-type Eclipsing Binaries
448 kB | Sebastián A. Otero | | 2006-08-01 | | | A search for massive eclipsing binaries in the eta Carinae area resulted in the discovery or confirmation of eighteen variable stars. Six of them are in fact eclipsing binaries and three are O-type systems. Simbad object(s): GSC 8626 1905, HD 303389, HD 93281, CD-59 3299, C* 1742, GSC 8626 1999, HD 93056, HD 92937, HD 92876, HD 92853, HD 305440, FU Car, HD 303408, HD 303302, Cl* Trumpler 16 MJ 596, CPD-59 2635, HD 93130, HD 303312, | comments: 0 |
| | 0044 | DK And: Reclassification as EW Binary from CCD Observations
1114 kB | Hambsch F.-J., Husar D. | | 2006-07-28 | | | This paper describes the reclassification of DK And, formerly classified as a RRc type star, as EW binary. 1599 CCD unfiltered and filtered (V and R band) observations between 1999 and 2005 show, that the star is actually an eclipsing binary star with a period of P = 0.4892224 +/- 0.0000002 [d] with epoch E0 = 2451435.4353 +/- 0.0010 (if all historic data were taken into account). From our new observations 12 timings of minimum light are given. Simbad object(s): DK And, | comments: 0 |
| | 0043 | Four Ross Variables Identified
41 kB | James Bedient | | 2006-07-24 | | | Four suspected variables, NSV 9124, NSV 9200, NSV 9248, and NSV 9457, detected on photographic plates by F.E. Ross at Yerkes Observatory, are identified as red variable stars. Simbad object(s): SV* R 041, SV* R 030, SV* R 026, SV* R 024, NSV 9457, NSV 9248, NSV 9200, NSV 9124, | comments: 0 |
| | 0042 | CV Monocerotis – a Collection of Maximum Times and a Revised Ephemeris
381 kB | Ralf Meyer | | 2006-07-15 | | | I review reported observations and times of maximum of the Classical Galactic Cepheid Variable CV Monocerotis. The ephemeris of the GCVS does not represent the data adequately and I give improved elements. There is no evidence of a substantial period change since the discovery of the variability. Simbad object(s): CV Mon, | comments: 0 |
| | 0041 | UX Tri: Period Change Discovered and Unchanged Strong Blazhko Effect Confirmed
416 kB | Herbert Achterberg, Dieter Husar | | 2006-07-13 | | | New CCD observations of the RRab star UX Tri after JD = 2452234 show a change of the main pulsation period. The period is now P = 0.4669046 ± 0.0000006 [d]. The change is ΔP = - 1.72 x 10-5 [d] if compared with the value we previously published [1]. A strong Blazhko effect with unchanged Blazhko period PB = 43.7 ± 0.1 [d] is confirmed by this paper. Light curve particularities around Blazhko phase ΦB = 0.0 are discussed in detail. In one observation (JD 2453617) related to Blazhko phase ΦB = 0.12 an exceptionally pronounced "bump" of Δm > -0.1 magnitudes was observed at pulsation phase φ = 0.71. Simbad object(s): UX Tri, | comments: 0 |
| | 0040 | V819 Cen = HD 115599
127 kB | Anton Paschke, Ennio Poretti | | 2006-06-22 | | | The period of V819 Cen was found in Asas data. Simbad object(s): V819 Cen, HD 115599, | comments: 0 |
| | 0039 | A Backyard CCD Photometric Study of the Neglected W UMa Binary EQ Tauri
727 kB | Kevin B. Alton | | 2006-06-22 | | | Analysis of CCD data collected in V- and R-band between Dec 2005 and March 2006 has been used to calculate an updated ephemeris and orbital period for EQ Tau. A Roche-type model invoking a hot spot in the neck region of the primary component produced a theoretical fit of light curve data in V that largely accounts for the peak asymmetry observed approaching Max I. Simbad object(s): CSV 347, SV* HV 6189, GSC 01260-00909, EQ Tau, | comments: 0 |
| | 0038 | Four Previously Unreported Red Variables in ASAS
216 kB | Martin Nicholson, Eric Whiting | | 2006-06-17 | | | Four new variables with high southern declination. Based on the rationale outlined by Greaves (2005) the 2MASS survey was data-mined for entries that matched the following criteria: dec < 0.000 and j_m - k_m >1.2 and vr_m_opt - j_m >6 and j_m <6.00. A total of 4,128 stars matched these four criteria. The publically available ASAS light curves for four previously unreported variables are presented. Simbad object(s): IRAS 12006-6558, IRAS 12229-6706, IRAS 12290-5553, GSC 09416-00679, | comments: 4 |
| | 0037 | GSC 847 1021 - a new brightish cataclysmic variable in Leo
52 kB | John Greaves | | 2006-06-09 | | | GSC 00847 01021 is revealed to be a cataclysmic variable of the UGSS subclass by Northern Sky Variability Survey data Simbad object(s): GSC 00847 01021, | comments: 0 |
| | 0036 | Confirmation of 109 objects in the NSV Catalogue as red long period variables
546 kB | John Greaves | | 2006-06-03 | | | Colours are derived from online surveys for suspected variables in the NSV having good positions and a red subset of the resultant data is assessed against the NSVS online time series database Simbad object(s): NSV 98, NSV 135, NSV 288, NSV 499, NSV 709, NSV 854, NSV 877, NSV 880, NSV 930, NSV 953, NSV 994, NSV 1210, NSV 1211, NSV 1343, NSV 1371, NSV 1383, NSV 1448, NSV 1473, NSV 1481, NSV 1497, ... | comments: 2 |
| | 0035 | Red variables in ASAS, part I, 0h - 2h
709 kB | Martin Nicholson | | 2006-06-03 | | | Based on the rationale outlined by Greaves (2005) the 2MASS survey was data-mined for entries that matched the following criteria: dec < 0.000 and j_m - k_m >1.2 and vr_m_opt - j_m >6 and j_m <6.00. A total of 4,128 stars matched these four criteria. The publically available ASAS light curves for those matching stars - between 0 and 2 hrs in right ascension - are presented. Simbad object(s): AG CET, UY CET, BD-10 66, BD-03 40, IRAS 00097-3527, RU OCT, V SCL, SY SCL, XY SCL, W CET, IRAS 23593-5306, T PHE, X HYI, IRAS 00477-4900, SON 5342, U TUC, IRAS 01013-6437, AD SCL, IRAS 01094-7152, XX TUC, ... | comments: 0 |
| | 0034 | Ten previously unreported variable stars with a high northern declination
557 kB | Martin Nicholson | | 2006-06-01 | | | A further search for variable stars has been conducted in the publicly available data of the Northern Sky Variability Survey (NSVS). The statistical properties of the star, the magnitude, magnitude scatter and median error were entered into a multi-factor algorithm to evaluate the most promising stars for further examination and analysis. The default settings for the NSVS user interface were used except, following the suggestion of Wils, Lloyd and Bernhard (2006), the APINCOMPL flag was set and the RADECFLIP flags unset. Only stars not listed in the “Combined General Catalogue of Variable Stars (Samus+ 2004)”, or in the “Suspected Variable stars and Supplement”, or in “Red Variables in the NSVS (Williams+, 2004)” or identified as variable in Simbad or identified in the International Variable Star Index have been included. Simbad object(s): IRAS 00251+6509, IRAS 00275+6826, IRAS 00512+7213, IRAS 01113+7800, IRAS 01148+6740, IRAS 02095+7013, IRAS 02252+6630, IRC +70042, BIS 138, DO 27996, | comments: 0 |
| | 0033 | Confirmation of 177 objects in the NSV Catalogue as red long period variables
635 kB | John Greaves | | 2006-05-31 | | | Colours are derived from online surveys for suspected variables in the NSV having good positions and a red subset of the resultant data is assessed against the ASAS3 online time series database Simbad object(s): NSV 166, NSV 244, NSV 326, NSV 329, NSV 350, NSV 443, NSV 502, NSV 605, NSV 620, NSV 1043, NSV 1071, NSV 1120, NSV 1171, NSV 1196, NSV 1214, NSV 1237, NSV 1564, NSV 1660, NSV 1675, NSV 1698, ... | comments: 8 |
| | 0032 | Six Variable Stars found in the NSVS Database
280 kB | Martin Nicholson, Eric Whiting | | 2006-05-23 | | | A search for variable stars has been conducted in the publicly available data of the Northern Sky Variability Survey (NSVS). The statistical properties of the star, the magnitude, magnitude scatter and median error were entered into a multi-factor algorithm to evaluate the most promising stars for further examination and analysis. The default settings for the NSVS user interface were used except, following the suggestion of Wils, Lloyd and Bernhard (2006), the APINCOMPL flag was set and the RADECFLIP flags unset. Only stars not listed in the “Combined General Catalogue of Variable Stars (Samus+ 2004)”, or in the “Suspected Variable stars and Supplement”, or in “Red Variables in the NSVS (Williams+, 2004)” or identified as variable in Simbad have been included. Simbad object(s): IRAS 00047+6436, IRAS 00060+6156, IRAS 00093+6021, IRAS 00139+6534, IRAS 00158+6310, IRAS 00163+6739, | comments: 0 |
| | 0031 | Two New Variable Stars in Draco
159 kB | Martin Nicholson, Paul Watkins | | 2006-05-19 | | | A second search for variable stars has been conducted in the publicly available data of the Northern Sky Variability Survey (NSVS). The statistical properties of the star, the magnitude, magnitude scatter and median error were entered into a multi-factor algorithm to evaluate the most promising stars for further examination and analysis. The default settings for the NSVS user interface were used except, following the suggestion of Wils, Lloyd and Bernhard (2006), the APINCOMPL flag was set and the RADECFLIP flags unset. Simbad object(s): GSC 04182-00325, IRAS 15181+6241, | comments: 3 |
| | 0030 | Three New Variable Stars in Cygnus
283 kB | Martin Nicholson, Carl Scottish | | 2006-05-18 | | | A search for variable stars has been conducted in the publicly available data of the Northern Sky Variability Survey (NSVS). The statistical properties of the star, the magnitude, magnitude scatter and median error were entered into a multi-factor algorithm to evaluate the most promising stars for further examination and analysis. The default settings for the NSVS user interface were used except, following the suggestion of Wils, Lloyd and Bernhard (2006), the APINCOMPL flag was set and the RADECFLIP flags unset. Simbad object(s): IRAS 20198+3553, GSC 02684-00094, GSC 02684-00774, | comments: 4 |
| | 0029 | Remarks on Three Stars - RR Scl, RS Scl and S Tel
132 kB | Mati Morel | | 2006-04-23 | | | Early 20th Century observations of RR & RS Scl and S Tel from Cape and Harvard Observatories have been re-examined. Modern data sources yield additional information. It is concluded that RR Scl is constant, RS Scl does not exist, and S Tel is a possible nova or other eruptive variable. Simbad object(s): RR Scl, RS Scl, S Tel, | comments: 0 |
| | 0028 | New Minimum Times of Eclipsing Binaries
147 kB | Ralf Meyer | | 2006-04-03 | | | I report 16 visual minimum times of eclipsing binaries. Simbad object(s): LY Aur, S Cnc, GU Cas, KR Cas, LR Cas, XZ Cep, GT Cep, UX Mon, VV Mon, AR Mon, Z Ori, CP Ori, Z Per, RW Tau, RW UMa, | comments: 0 |
| | 0027 | A Note on the Orbital Period of TW And
354 kB | Petr Molik | | 2006-03-28 | | | History of period behaviour and corrected light elements of the eclipsing binary TW And are presented in this note. Simbad object(s): TW And, | comments: 0 |
| | 0026 | BM Persei: Period change and a new ephemeris
314 kB | Ralf Meyer | | 2006-03-26 | | | BM Persei is a classical cepheid with a long period of 23 days. Recent observations show a period increase. I collect maximum times, show lightcurves and an O-C-diagram and offer a revised ephemeris. Simbad object(s): BM Per, | comments: 0 |
| | 0025 | Five new red variables in the ASAS-3 database
36 kB | Sokolovsky, K.V., Pojmanski, G. | | 2006-02-24 | | | Five new semiregular variable stars are presented. They were selected from the UCAC2 catalog as very red objects (Greaves J.). ASAS-3 light curves of this stars show clear variability. Despite that, they were not yet included in ASAS-3 Catalog of Variable Stars. Finding charts, light curves, and raw data for this stars are available from the ASAS web page: http://www.astrouw.edu.pl/~gp/asas. Simbad object(s): IRAS 18213-1039, IRAS 18103-1728, IRC-20380, USNO-B1.0 0840-0399000, IRAS 18336-1311, | comments: 0 |
| | 0024 | An improved ephemeris for AB Persei
307 kB | Ralf Meyer | | 2006-02-17 | | | The ephemeris of the eclipsing binary AB Persei given in the GCVS represents modern data badly. I review reported observations and offer an improved ephemeris. Simbad object(s): AB Per, | comments: 0 |
| | 0023 | Proceedings of the 37th Conference on Variable Stars Research
7177 kB | Brat L., Graf T., Hric L., Chrastina M., Ledvinka S., Mikulasek Z., Molik P., Motl D., Paschke A., Pecharova P., Pejcha O., Petrik K., Skalicky J., Svoboda P., Szasz G., Smelcer L., Svaricek P., Zejda M. | | 2006-02-11 | | | T UMi Keeps Mysterious * Gravitational Microlensing and Variable Stars * O-C Gateway * Open European Journal on Variable stars * Experiences with Technology for Variable Star CCD Observing * Apsidal Motion of CO Lacertae * ALTAN.Observatory Annual Report 2005 * V839 Oph - 60 Years After Its Discovery * Proposal of Observational Program of CCD Monitoring of 30 Carbon Miras * Codes Normles1 and Normles – Light Curve Examination Tools * BL Cam * The Role of Nicholas Copernicus * Planetarium and Observatory In Astronomical Education * The CzeV Catalogue – Czech Variable Stars * Periodic Changes in O-C Diagrams * Bohemian Regional Network of Observers * Analysis of Van Houtens Estimates of Variable Stars From Photographic Plates * 12 New Variable Stars * Project Prosper * Updated ephemeris, (O-C) diagrams and light fluctuations of the supersoft X-ray source QR And * Photometry of the supersoft X-ray source V Sagittae during its large outburst in 2004 Simbad object(s): T UMi, BH Cru, LX Cyg, R Hya, CO Lac, V839 Oph, V1500 Cyg, BX And, V523 Cas, V 374 Aql, S Aur, UV Aur, AU Aur, AZ Aur, S Cam, R CMi, W Cas, X Cas, HV Cas, S Cep, ... | comments: 0 |
| | 0022 | Detection of Gamma Ray Bursts and X-ray transient SGR1806-20 with VLF Radio Telescopes
1083 kB | Rodney Howe | | 2006-02-10 | | | The VLF computer model proposed in this paper examines whether gamma ray bursts (GRB) or X-ray transient flux from distant supernova can be detected by amateur VLF radios. Arguments presented in this paper compare how GRBs created from supernova events might cause detectable signatures similar to magnetar or other local X-ray transient Sudden Ionospheric Disturbances (SID). High-energy GRB and short X-ray transients of supernova (SN) origin affect the upper ionosphere through Compton free electron interaction and not through magnetic field reconnection as local solar plasma might affect the earth’s magnetosphere. Gamma ray and X-ray ionization of the upper F2 layer, or thermosphere, should be a measure of ionizing radiation as small as 10-6 ergs, yet may not be detectable with amateur VLF radios. High-energy solar plasma interactions causing ionization have larger energy regimes, which impact the lower ionosphere layers. Local atmospherics such as lightening, and sprites also confound detection of SN GRB. Only events of very long duration, such as the nighttime ionosphere disturbance from SRG1900+14, or a recent ‘super flare’ from SGR1806-20 located toward the center of our galaxy 45,000 light years away from earth, and GRB030329 IBVS 5415 have been detected at Very Low Frequencies (Peterson and Price et. al, 2003, Price et. al, 2004). Simbad object(s): SGR1806-20, GRB030329, | comments: 0 |
| | 0021 | The Peculiar Cepheid TW Capricorni
435 kB | Ralf Meyer | | 2006-01-30 | | | 55 maxima since 1917 of the peculiar cepheid TW Cap is reported. The star is undergoing drastic period changes and has variable shape of the lightcurve. Simbad object(s): TW Cap, | comments: 0 |
| | 0020 | A pitfall in reading astronomical daytime arguments
56 kB | Ralf Meyer | | 2006-01-27 | | | The astronomical count of day fractions always starts at mean noon. This statement is not anymore trivial when trying to assign to historical time reports before 1925 Julian day numbers with the help of modern computer software. | comments: 1 |
| | 0019 | Period, Amplitude and Light Curve of V38 in M13
466 kB | Violat Bordonau, F., Arranz Heras, T., Diez Gago, A. | | 2006-01-23 | | | We have measured the period and amplitude of the new red variable star V38 (L414), of M13 (NGC 6205, C 1639+365), using CCDs and amateur telescopes (35.5-, 30.5- and 20.3-cm) from Spain in the years 2001-2005. The analysis of our CCD frames shows that V38 is a red variable star with a period of approximately 81 days, and low amplitude nearly 0.08 magnitudes: the period agrees with Osborn' s (1977) measures, but the period and amplitude with Kopacki' s et al. (2003) data. Also for 14 radial velocities published we find a pulsating period P = 83 days, consistent with the others three periods founded. | comments: 0 |
| | 0018 | Red Variable Stars found in the NSVS Database (2)
194 kB | Martin Nicholson, Hannah Varley | | 2006-01-22 | | | Data from the 2MASS was used to generate positional information for red stars. The publicly available NSVS data was then examined and 24 previously unreported variable stars were found. Simbad object(s): IRAS 23497+5050, IRAS 23481+5316, IRAS 22549+4442, IRAS 22286+4731, IRAS 22272+4832, GSC 3198-0175, IRAS 20564+5918, IRAS 20534+4641, GSC 3958-1603, IRAS 19193+3032, IRAS 17278+6416, IRAS 07178+4023, GSC 2421-0613, IRAS 06156+5752, IRAS 05178+4722, GSC 3745-1205, GSC 2378-0295, IRAS 04196+4951, IRAS 03276+6238, IRAS 03250+6334, ... | comments: 1 |
| | 0017 | A survey of “Flaring Orion Variables” in the NSVS Database.
1167 kB | Martin Nicholson, Hannah Varley | | 2006-01-21 | | | A survey of "Flaring Orion Variables" based on NSVS data suggests that some examples have been misclassified in the General Catalogue of Variable Stars. Simbad object(s): V1257 ORI, V718 ORI, V1254 ORI, V1236 ORI, V389 ORI, V1181 ORI, UZ ORI, V863 ORI, V751 ORI, V778 ORI, V1153 ORI, V939 ORI, V705 ORI, V385 ORI, V1075 ORI, V766 ORI, V1144 ORI, V870 ORI, V1142 ORI, V1296 ORI, ... | comments: 3 |
| | 0016 | Total eclipses of CK Dra
182 kB | Lubos Brat | | 2006-01-19 | | | The Algol type eclipsing binary CK Draconi with period 4.994511 days has total eclipses more then 3.5 hours long. The period is inaccurate and should be corrected. In first half of 2006, good observation season will set in and every 5th night, the minimum of CK Dra can be observed. Simbad object(s): CK Dra, | comments: 0 |
| | 0015 | Red Variable Stars found in the NSVS Database
203 kB | Martin Nicholson, Hannah Varley | | 2006-01-16 | | | Data from the 2MASS was used to generate positional information for red stars. The publicly available NSVS data was then examined for these stars and 25 previously unreported variable stars was found. Simbad object(s): GSC 2767-1716, IRAS 23208+6502, IRAS 22465+6118, TYC 2723-1647-1, IRAS 21332+6201, IRAS 20463+3229, IRAS 20005+3540, IRAS 19553+3145, IRAS 19141+3913, IRAS 19103+4740, IRAS 18521+3116, IRAS 05578+3500, IRAS 05473+3141, IRAS 04553+4315, IRAS 04173+7111, IRAS 04056+5016, IRAS 02208+6051, IRAS 02087+6517, GSC 4041-0983, IRAS 01282+5705, ... | comments: 1 |
| | 0014 | New Variable Stars found in the NSVS Database (2)
416 kB | Martin Nicholson, Jane Sutherland | | 2006-01-03 | | | In 2004 and 2005 a search for variable stars not listed in the General Catalogue of Variable Stars or in Sinbad was conducted by members of the Remote Astronomical Society in the publicly available data of the Northern Sky Variability Survey (NSVS, Wozniak et al., 2004). NSVS fields were searched for candidates with both a sufficient number of observations to allow valid analysis and also with a significantly higher magnitude scatter than normal for stars of their magnitude. Simbad object(s): USNO-A2.0 1425-10559361, GSC 3941-1661, USNO-A2.0 1425-10540737, TYC 3945-1690-1, GSC 3949-1750, GSC 3937-0551, GSC 3949-1849, GSC 3941-1532, USNO-A2.0 1425-10672862, GSC 3958-0410, TYC 3958-1457-1, USNO-A2.0 1425-11112996, TYC 3586-1200-1, TYC 3955-583-1, | comments: 3 |
| | 0013 | X Cyg: observations from 1886 until today
403 kB | Ralf Meyer | | 2005-12-31 | | | Because of methodical reasons many early observations of X Cygni between 1886 and 1914 are biased. Taking these biased data out of calculation there is no evidence of a period change left. Simbad object(s): X Cyg, | comments: 0 |
| | 0012 | New Variable Stars found in the NSVS Database
237 kB | Martin Nicholson, Jane and Charles Sutherland | | 2005-12-30 | | | A search for previously unreported variable stars was conducted by members of the Remote Astronomical Society in the publicly available data of the Northern Sky Variability Survey (NSVS, Wozniak et al., 2004). NSVS fields were searched for candidates with both a sufficient number of observations to allow valid analysis and also with a significantly higher magnitude scatter than normal for stars of their magnitude. Simbad object(s): TYC 4141-54-1, GSC 3428-0212, GSC 3428-0003, GSC 3432-0094, GSC 3433-1003, GSC 3440-1097, TYC 1174-352-1, TYC 1174-344-1, | comments: 9 |
| | 0011 | UW Lacertae in the Northern Sky Variability Survey
104 kB | M P Nicholson, H Varley | | 2005-12-29 | | | Although the quantity of reliable photometric data in the Northern Sky Variability Survey (http://skydot.lanl.gov/nsvs/nsvs.php) was limited to 85 points it proved possible to obtain an ephemeris that closely matched previously published figures. Simbad object(s): UW Lac, | comments: 2 |
| | 0010 | OT And - a Long Period EA Binary with Increasing O-C
376 kB | Dieter Husar | | 2005-12-18 | | | Results are compared with Crawford, R.C. et al., IBVS 2624 (1984). There seems to be indication for increasing O-C. Further observations are encouraged to improve the current elements. Simbad object(s): OT And, | comments: 2 |
| | 0009 | PHOTOMETRIC STUDY OF THE V2 CEPHEID IN M13
396 kB | Violat Bordonau, F., Sanchez Bajo, F., Bennasar Andreu, T. | | 2005-12-02 | | | Small amateur telescopes equipped with photometric filters and CCD cameras constitute a valuable tool for variable star research. In this regard, we have carried out a photometric campaign over last three years (May 2001-November 2003), centered on the globular cluster M13 (NGC 6205). In this work, we present the results obtained from the photometric analysis of the BL Her cepheid V2 data, that can be used to estimate the distance to M13 (8.0 kpc), as well as some physical features of the star (mean radius: about 13 solar radii, effective temperature: about 6630 K, mean absolute bolometric magnitude: -1.49, and mean luminosity of 316 times the solar luminosity). | comments: 0 |
| | 0008 | WW And: no decrease of amplitude
578 kB | Ralf Meyer | | 2005-11-18 | | | I compare reported visual observations of the eclipsing binary WW Andromedae of the 1920ies with professional photometries of 1991 and with my own visual data. Contrary to some presumptions in the professional literature, the amplitude of light variation since its discovery probably never changed and always was as bad as 0,6mag. WW And therefore is no rewarding object of visual observation. Simbad object(s): WW And, | comments: 0 |
| | 0007 | UW Lacertae
283 kB | Ralf Meyer | | 2005-11-11 | | | UW Lac is an eclipsing binary star, whose astrophysical and geometrical specification based on precise photoelectric or CCD measurements still is missing. The period is about 5 days, the light variation is slow and cannot be observed in one night. A visual light curve and a refined ephemeris are given. (2005NOV) Simbad object(s): UW Lac, | comments: 0 |
| | 0006 | GEOS Note Circulare 1024
267 kB | J. Vandenbroere |  | 2005-11-04 | | | GEOS Note Circulaire 1024 is a summary of the observations on LZ Dra = NSV 12223 = GSC 4456.1244 made by GEOS members. A first summary was published in November 2001 as IBVS 5207. By now 42 minima timings are known, the observation goes on. Simbad object(s): LZ Dra, | comments: 0 |
| | 0005 | Outburst of symbiotic variable YY Her
232 kB | Ladislav Smelcer | | 2005-10-24 | | | New CCD observation of symbiotic variable YY Her shows rapid brightening in half of October 2005, which can be described as outburst. The latest CCD+V and CCD+R light curve of YY Her shows pic # 1 in this paper. Simbad object(s): YY Her, | comments: 0 |
| | 0004 | New Spots Appears on V 728 Her?
245 kB | Lubos Brat | | 2005-10-21 | | | New CCD observation of V728 Her shows asymmetric light curve near minimum. There is no asymmetry present in photometric B and V light curve obtained in 1988 by Agerer and col. New multicolor CCD observation of V728 Her is needed. Simbad object(s): V728 Her, | comments: 2 |
| | 0003 | Minima Kurt Locher 2004-2005
113 kB | Kurt Locher | | 2005-10-13 | | | Minima observed 2004..2005 by Kurt Locher visually, not accepted by IBVS as part of BBSAG Bulletin. Simbad object(s): UU And, WZ And, XZ And, CP And, CU And, EP And, GZ And, HS And, V425 And, GSC 2775-1188, UU Aqr, XZ Aqr, AT Aqr, CX Aqr, CZ Aqr, GK Aqr, GSC 568-1658, XZ Aql, LT Aql, V479 Aql, ... | comments: 2 |
| | 0002 | NOTE CIRCULAIRE GEOS NC 1028
189 kB | J. Vanderbroere | | 2005-10-13 | | | Times of maxima of RR Lyr variables Simbad object(s): SW And, RS Aps, V 341 Aql, ST Boo, TT Cnc, TT Cnc, W CVn, SS CVn, AA CMi, RZ Cep, DX Cep, UY Cyg, DX Del, XZ Dra, AR Her, ST Leo, RZ Lyr, AV Peg, DH Peg, | comments: 0 |
| | 0001 | BAV MITTEILUNGEN NR. 174
219 kB | J.Hübscher, Th.Lange, A.Paschke, F.Vohla, F. Walter |  | 2005-10-13 | | | In this 54th compilation of BAV results, visual observations obtained in the years 2004 and 2005 are presented on 359 variables stars giving 728 minima and maxima. Simbad object(s): AQ And, CD And, GP And, R And, RR And, RW And, SW And, T And, TU And, TW And, UW And, V And, W And, XX And, XZ And, Y And, YZ And, Z And, FF Aql, KO Aql, ... | comments: 0 |
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