|Article in PDF||
vol. 7, N 29 (2007)
|#1 Sternberg Astronomical Institute, Moscow State University;
#2 Institute of Astronomy, Russian Academy of Sciences;
#3 Astro Space Center, Lebedev Physical Institute, Russian Academy of Sciences
Received: 12.11.2007; accepted: 12.11.2007
(E-mail for contact: email@example.com, firstname.lastname@example.org)
|Our observations of GSC 2050-00745, an RRAB type variable star with strong Blazhko
(Antipin et al., 2005), have been continued. Our CCD photometry was carried out at
the Crimean Laboratory, Sternberg Astronomical Institute, using
a Pictor 416XTE camera at the 50-cm reflector in 2006 and a SBIG ST2000XM
CCD camera at the 60-cm reflector in 2007. 127 V-band brightness measurements were
obtained on two nights
in 2006: July 25 - 26, JD2453942-43; and 218 measurements, on three nights in 2007:
July 11 - 16, JD2454293-98. The images were dark subtracted, flat-fielded and analyzed
with the aperture
photometry package developed by V.P. Goranskij. GSC 2050-00597 was used for comparison.
The phased light curve is given in the Figure. The V-band amplitude of pulsations
changes from 0.57m in 2006 to 1.34m in 2005.
Unfortunately, the Blazhko period still remains unknown.
Acknowledgments: The authors thank S. Korotkiy and Ka-Dar Public Observatory for providing equipment for our observing run in 2007. We are grateful to the Russian Foundation for Basic Research (grants Nos. 05-02-16688 and 05-02-16289) for partial support of this study.
|Antipin, S.V., Sokolovsky, K.V., Lebedev, A.A., 2005, IBVS, No. 5654|
The phased light curves for four seasons of observations: 2004 (July 5 - 28) - violet; 2005 (June 30 - July 20) - orange; 2006 (July 25 - 26) - green; 2007 (July 11 - 16) - blue.