New Light Elements for 13 NSV Stars

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

Received:   8.10.2008;   accepted:   25.11.2008
(E-mail for contact: helene@inasan.ru, pastukhova@sai.msu.ru)

Comments:


1. M-m = 0.15.

2. M-m = 0.31.

3. M-m = 0.10. Suspected by Luyten (1935); no finding chart previously published. We were able to recover the variable.

4. MinII = 14.9:, D = 0.12.

5. MinII = 8.43:.

6. M-m = 0.14. The ASAS-3 range is for the combined brightness of the variable star and its neighbor.

7. MinI = MinII. A twice shorter period and type RRC are possible.

8. M-m = 0.40.

9. M-m = 0.28. The ASAS-3 range is for the combined brightness of the variable star and its neighbor.

10. M-m = 0.34. This star was studied by Otero (2008) on the same material and with essentially the same results, but he erroneously identified the star with 2MASS J15375108-1522120, and the variable's coordinates published by him are wrong by more than 4 arcminutes.

11. M-m = 0.45. A twice longer period and type EW are possible.

12. MinII = 14.2.

13. M-m = 0.30. The ASAS-3 range is for the combined brightness of the variable star and its neighbor.

Remarks:
We could study the variables thanks to the publicly available electronic archives of CCD observations of the ASAS-3 project (Pojmanski, 2002) and the US Naval Observatory Image and Catalogue Archive (http://www.nofs.navy.mil/data/FchPix/).

Acknowledgements: Our studies are supported by grants from the Russian Foundation for Basic Research (grant No. 08-02-00375), from the Program "Origin and Evolution of Stars and Galaxies" of the Presidium of Russian Academy of Science, and from the Program of Support for Leading Scientific Schools of Russia (grant No. NSh 433.2008.2).

References:
Luyten, W.J., 1935, AN, 256, 327
Otero, S.A., 2008, OEJV, 93
Pojmanski, G., 2002, Acta Astronomica, 52, 397