The First Determination of Light Elements for Seven NSV Stars

E. V. Kazarovets, E. N. Pastukhova
Institute of Astronomy, Russian Academy of Sciences, Moscow, Russia

Received:   18.05.2006;   accepted:   22.05.2006
(E-mail for contact: elena_k@sai.msu.ru)

Comments:


1. In the light curve, our eye estimates of the variable's brightness on the red USNO archive images were reduced to the V photometric system of the ASAS-3 survey using V-R=1.0.

3. MinII=11.63, D=0.15P

6. MinII=14.5

Remarks:
In our work on the improvement of the coordinates for all stars in the NSV catalog, we succeeded in studying seven variable stars. We could find and study the variables thanks to the publicly available electronic archives of CCD observations of the ASAS-3 (Pojmanski, 2002) and ROTSE1/NSVS (Wozniak et al., 2004) surveys. We recovered the variables NSV 05769 and 05918 suspected by Luyten (1933) who had published only the variability ranges and very rough coordinates. The candidates were found using the US Naval Observatory Image Archive (http://www.nofs.navy.mil/data/fchpix/).

Thanks are due to Dr. S.V. Antipin and Dr. L.N. Berdnikov for their assistance during the preparation of the paper. Our studies are supported by grants from the Russian Foundation for Basic Research (05-02-16289), from the Program "Origin and Evolution of Stars and Galaxies" of the Presidium of Russian Academy of Science, sand from the Program of Support for Leading Scientific Schools of Russia.

References:
Luyten, W.J., 1933, AN, 249, 396
Pojmanski, G., 2002, Acta Astronomica, 52, 397
Wozniak, P.R., Vestrand, W.T., Akerlof, C.W. et al., 2004, Astron.J., 127, 2436