Peremennye Zvezdy

"Peremennye Zvezdy",
Prilozhenie
,
vol. 9, N 18 (2009)

New Eclipsing Variable Stars in Canis Minor

T. Kryachko#1, A. Samokhvalov#2, S. A. Korotkiy#3
#1. Astrotel Observatory, Karachay-Cherkessia, Russia;
#2. Surgut, Russia;
#3. Ka-Dar Scientific Center and Public Observatory, Moscow, Russia

Received:   15.05.2009;   accepted:   17.06.2009
(E-mail for contact: bredfild@mail.ru, sav@surgut.ru, astro_stas@mail.ru)


#NameOtherCoord (J2000)TypeMaxMinSystemPeriodEpoch (JD)typeSpCommentL.CurveFind.ChartData
1 USNO-A2.0 0975-0510819807 26 03.29, +08 36 46.6EW15.2115.38 0.46672454882.4161min Comm. 101_PC-R.png01_ch.jpg01_data.txt
2 USNO-A2.0 0975-0511322107 26 18.15, +08 37 59.2EW15.7716.18 0.34362454882.3974min Comm. 202_PC-R.png02_ch.jpg02_data.txt
3 USNO-A2.0 0975-0512687407 26 59.31, +08 38 41.3EW15.5515.75 0.54682454882.3067min Comm. 303_PC-R.png03_ch.jpg03_data.txt
4 USNO-A2.0 0975-0514128507 27 43.78, +08 18 03.5EA16.5017.30 0.84092454882.3525min Comm. 404_PC-R.png04_ch.jpg04_data.txt
5 USNO-A2.0 0975-0516707807 29 02.66, +08 19 40.2EW15.1315.31 0.24352454895.3562min Comm. 505_PC-R.png05_ch.jpg05_data.txt

Comments:


1. We observed two primary minima: HJD 2454882.4161, 2454889.4128.

2. We observed three primary minima: HJD 2454881.3678, 2454882.3974, 2454889.2702. Min II = 16.15.

3. We observed one primary minimum: HJD 2454882.3067.

4. We observed one primary minimum: HJD 2454882.3525. Min II = 17.12.

5. We observed three primary minima: HJD 2454882.4455, 2454889.2666, 2454895.3562. Min II = 15.29.

Remarks:
During observations of a field in Canis Minor, we discovered 5 new eclipsing variable stars. Our observations were carried out at Astrotel-Caucasus observatory using 80-mm f/6 ED refractor, equipped with an unfiltered SBIG ST-2000XM CCD camera. A total of 216 images with 5-minute exposures were obtained on JD 2454881 - 2454895. For basic reduction for dark current and flat fields, we used IRAF routines. For search and photometry of new variable stars we applied VaST software by Sokolovsky and Lebedev (2005). The comparison star is USNO-B1.0 0981-0175696 (07:28:58.25, +08:09:12.1, J2000; R1 = 13.31, R2 = 13.23). Unfiltered magnitudes were calibrated using the comparison star, assuming Rcomp = 13.27. Coordinates of the variable stars in the table were drawn from the 2MASS catalogue (Cutri et al, 2003). For search for periods and epochs of primary minima we use Peranso software (www.peranso.com).

Acknowledgements: We would like to thank S. V. Antipin and N. N. Samus for helpful discussion.

References:
Cutri, R.M., Skrutskie, M.F., van Dyk, S., et al., 2003, 2MASS All Sky Catalog of Point Sources, Centre de Donnees Astronomiques de Strasbourg, II/246
Sokolovsky, K., Lebedev, A., 2005, in 12th Young Scientists' Conference on Astronomy and Space Physics, Kyiv, Ukraine, April 19-23, 2005, eds.: Simon, A.; Golovin, A., p.79



Main Page | Search
Astronet | SAI | INASAN

Report problems