Article in PDF |
"Peremennye Zvezdy", Prilozhenie, vol. 6, N 21 (2006) |
ISSN 2221–0474 |
Received: 8.08.2006; accepted: 9.10.2006
(E-mail for contact: khruslov@bk.ru)
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Comments:
1. The X-ray source 1RXS J050730.9+714503 is somewhat far from the variable.
2. 1RXS J065321.1+724558.
3. 1RXS J071314.2+701627. (B-V)(Tycho)=0.874.
4. 1RXS J152416.0+530806.
5. 1RXS J181928.2+365235. An eclipse (13.7m) at phase 0.35 is not excluded.Remarks:
I present the discovery of 5 new RS CVn stars without eclipses. This classification is in agreement with the stars' relatively small amplitudes and with our identification of the stars with X-ray sources. A search for variables was carried out in the publicly available data of the Northern Sky Variability Survey (NSVS, Wozniak et al., 2004, also see http://skydot.lanl.gov/nsvs). These observations were analyzed using the period-search software developed by Dr. V.P. Goranskij for Windows environment. The coordinates were drawn either from the Tycho-2 or 2MASS catalogs. The ROTSE data with photometric correction flags (usually rejected) were kept for the analysis. In the cases of GSC 4350-00064 and TYC 4364 01028 1, the use of these data considerably increases the number of available observations without deteriorating quality and allows us to determine their periods more accurately.References:
Wozniak, P.R., Vestrand, W.T., Akerlof, C.W. et al., 2004, Astron. J., 127, 2436