Peremennye Zvezdy

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

GSC 3515-01231 - a New RR Lyrae Variable

A. V. Khruslov
Russia, Tula

Received:   13.02.2008;   accepted:   26.02.2008
(E-mail for contact:

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

In the NSVS data (Wozniak et al., 2004, also see, 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.
The Comparison Stars

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

Light Curve
GSC 3515-01231 - a New RR Lyrae Variable
Finding Chart
GSC 3515-01231 - a New RR Lyrae Variable
Data Source
  1. rr.txt

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