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"Peremennye Zvezdy", Prilozhenie, vol. 8, N 9 (2008)

GSC 3515-01231 - a New RR Lyrae Variable

A. V. Khruslov
Russia, Tula

ISSN 2221–0474

Received:   13.02.2008;   accepted:   26.02.2008
(E-mail for contact: khruslov@bk.ru)

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Star Name: GSC 3515-01231, NSVS 5397700 Coordinates (J2000): 17 52 39.89, +48 37 02.1 Variability type: RRAB;   Limits, System: 13.0 - 14.1 (Bpg);     Period: 0.5902848 d;   Epoch(max): JD 2445159.079

Remarks:

In the NSVS data (Wozniak et al., 2004, also see http://skydot.lanl.gov/nsvs), we noticed variability of the object NSVS 5397700 with a period and light curve shape characteristic of RRAB stars but with a low amplitude, 0.4 mag. The ROTSE-I position of NSVS 5397700 is between two stars, GSC 03515-01231 and GSC 03515-01748, and it remained unclear which of them varied, with their combined brightness apparently presented in the NSVS. To answer this question, we estimated 119 plates of Moscow collection taken with the 40-cm astrograph in Crimea (JD2434103 - 2448892). We found that it is GSC 3515-01231 that varies. It is an RRAB star with a normal amplitude and M-m = 0.17 P. The NSVS data and our observations were analyzed using the period-search software developed by Dr. V.P. Goranskij for Windows environment. The coordinates are from the 2MASS catalog (Cutri et al., 2003). The magnitudes of the comparison stars are B2 magnitudes from the USNO-B1.0 catalog (Monet et al., 2003). GSC USNO-B1.0 B2 mag. a 3515-01140 1385-0277644 12.50 b 3515-01141 1387-0277017 13.26 c 3515-01177 1386-0277758 13.31 d 3515-01534 1386-0277596 13.64 e 3515-01726 1386-0277639 14.14 The Comparison Stars

References:

Cutri, R.M., Skrutskie, M.F., Van Dyk, S. et al., 2003, 2MASS All-Sky Catalog of Point Sources, IPAC/California Institute of Technology Monet, D.G., Levine, S.E., Canzian, B. et al., 2003, Astron. J., 125, 984 Wozniak, P.R., Vestrand, W.T., Akerlof, C.W. et al., 2004, Astron. J., 127, 2436