Peremennye Zvezdy

"Peremennye Zvezdy",
Prilozhenie
,
vol. 11, N 5 (2011)

New Eclipsing Variable Stars Discovered in Krasnoyarsk

S. A. Veselkov#1, E. G. Lapukhin#1, S. V. Antipin#2,3, N. N. Samus#3,2
#1. Siberian State Aerospace University, Krasnoyarsk, Russia;
#2. Sternberg Astronomical Institute, Moscow, Russia;
#3. Institute of Astronomy, Russian Academy of Sciences, Moscow, Russia

Received:   7.12.2010;   accepted:   15.02.2011
(E-mail for contact: veselkovsa@sibsau.ru)


#NameOtherCoord (J2000)TypeMaxMinSystemPeriodEpoch (JD)typeSpCommentL.CurveFind.ChartData
1 USNO-A2.0 1425-0036430700 15 20.98, +53 42 49.5EW13.3<13.8 0.334242455507.272min Comm. 11425-364307.pngch1425-364307.png1425364307.txt
2 USNO-A2.0 1425-0037985300 16 02.53, +53 54 19.9EA14.3<15.4 1.15792455507.1258min Comm. 21425-379853.pngch1425-379853.png1425379853.txt
3 USNO-A2.0 1425-0041300000 17 30.20, +55 11 15.4EB13.5<14.15 0.893592455513.176min Comm. 31425-413000.pngch1425-413000.png1425413000.txt
4 USNO-A2.0 1425-0045849900 19 29.78, +53 39 58.0EW13.2513.75 0.379902455507.1422min Comm. 41425-458499.pngch1425-458499.png1425458499.txt

Comments:


1. MinII 13m.74.

2. MinII 14m.50.

3. MinII 13m.73.

4. MinII 13m.70. Slight O'Connell effect.

Remarks:
On August 20 – November 12, 2010, we obtained about 1500 unfiltered CCD observations of a field in Cassiopeia. Our observations were performed in the city of Krasnoyarsk with a Hamilton telescope (D = 400 mm, F = 915 mm) equipped with an FLI ML9000 CCD chip (3056x3056 pixels, pixel size 12 μm). The magnitudes were referred to red magnitudes of comparison stars from the USNO-A2.0 catalog (Monet et al. 1998). The limiting magnitude of these data is about 16m, due to light pollution in a large city and transparency problems. MaxImDL software was used for photometry.

We have started using these observations for search for new variable stars. Four new eclisping variable stars could be discovered and studied during the first stage of this project. Our search for variable stars made use of the C-Munipack package. To search for periods, we applied WinEfk software provided by V.P. Goranskij.

Acknowledgements: The authors wish to thank Dr. V.P. Goranskij for providing his efficient period-search software.

References:
Monet, D., Bird, A., Canzian, B., et al., 1998, USNO-A2.0, A Catalog of Astrometric Standards (U.S. Naval Observatory, Washington, DC), Centre de Donnees Astronomiques de Strasbourg, I/252



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