Light Elements for 30 Mira Type Variables from the NSV Catalog

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

Received:   23.01.2013;   accepted:   7.03.2013
(E-mail for contact: helene@inasan.ru, pastukhova@sai.msu.ru)

Comments:


1. HV 9005 was discovered by Luyten (1935) and found, upon our request, by D. Williams on Harvard plates. A finding chart for this variable has never been published.

2. BV 1688 was discovered by Strohmeier and Knigge (1975).

3. HV 3929 was discovered by Woods (1926).

4. HV 9014 was discovered by Luyten (1937). No finding chart was available for this variable. Terzan and Ounnas (1988) discovered NSV 20914 (R = 14.3-16.7). We now identify NSV 8182 and NSV 20914.

5. HV 3933 was discovered by Woods (1926) and, independently, by Strohmeier and Knigge (1975). The star was also discovered in the ASAS-3 survey and enters their variable-star catalog as a MISC-type star but with a wrong period (61.5d). R = 14.3 on the USNO Archive image of 1990-07-21.

6. HV 9019 was discovered by Luyten (1937). No finding chart was available for this variable. We recovered the variable using US Naval Observatory Images. R = 16.0 on the DSS2 image of 1992-07-28.

7. HV 3939 was discovered by Woods (1926). Terzan and Ounnas (1988) discovered NSV 20971 (R = 13.5-14.9). As a result of the more accurate determination of coordinates for HV 3939, we now identify NSV 08225 and NSV 20971.

8. HV 9021 was discovered by Luyten (1935). No finding chart was available for this variable. We recovered the variable using US Naval Observatory Images. R = 15.0 on the DSS2 image of 1998-06-18.

9. HV 3940 was discovered by Woods (1926) and, independently, by Strohmeier and Knigge (1975).

10. HV 9023 was discovered by Luyten (1935), independently discovered by Hoffmeister (1963) and by Christiansen et al. (2008), but with a wrong period (175d). R = 14.3 on the DSS2 image of 1993-04-01.

11. HV 9027 was discovered by Luyten (1935). No finding chart was available for this variable. We recovered the variable using US Naval Observatory Images. R = 15.5 on the DSS2 image of 1997-03-31.

12. HV 9028 was discovered by Luyten (1935). No finding chart was available for this variable. We recovered the variable using US Naval Observatory Images. R = 16.0 on the DSS2 image of 1997-04-28.

13. SVS 430 was discovered by Shajn (1934).

14. BV 964 was discovered by Knigge and Bauerfeind (1967), but their published right ascension was wrong by +12 s. Terzan and Ounnas (1988) discovered NSV 21300. We now identify NSV 08448 and NSV 21300. R = 16.5 on the DSS2 image of 1992-07-21.

15. BV 1697 was discovered by Strohmeier and Knigge (1975) and, independently, by Terzan and Ounnas (1988). R = 16.4 on the DSS2 image of 1992-07-28.

16. NSV 08492 was discovered by Oosterhoff (1936). R = 15.7 on the DSS2 image of 1988-07-15.

17. HV 9039 was discovered by Luyten (1933). No finding chart was available for this variable. We recovered the variable using US Naval Observatory Images. R = 14.2 on the DSS2 image of 1995-08-25.

18. HV 9040 was discovered by Luyten (1935). No finding chart was available for this variable. We recovered the variable using US Naval Observatory Images. R = 15.2 on the DSS2 image of 1992-08-01.

19. HV 3956 was discovered by Woods (1926) and found, upon our request, by the late Dr. M. Hazen in Harvard Observatory's logbooks. No finding chart was earlier published for this variable. R = 16.9 on the DSS2 image of 1997-04-30. A twice shorter period is possible.

20. SVS 444 was discovered by Shajn (1934). R = 14.9 on the DSS2 image of 1988-07-15.

21. SVS 445 was discovered by Shajn (1934).

22. HV 9053 was discovered by Luyten (1935). No finding chart was available for this variable. We recovered the variable using US Naval Observatory Images. This star was discovered in the ASAS-3 survey and enters their variable-star catalog as a MIRA-type star but with a wrong period (357.7d).

23. HV 8722 was discovered by Luyten (1937). No finding chart was available for this variable. We recovered the variable using US Naval Observatory Images. R = 17.4 on the DSS2 image of 1988-07-15 and R = 12.2 on the DSS2 image of 1992-04-09.

24. SVS 450 was discovered by Shajn (1934), bud published right ascension was wrong by +1 min.

25. HV 9059 was discovered by Luyten (1934). No finding chart was available for this variable. We recovered the variable using US Naval Observatory Images. R = 15.0 on the DSS2 image of 1991-09-01.

26. HV 9061 was discovered by Luyten (1936) and found, upon our request, by D. Williams on Harvard plates.

27. HV 9064 was discovered by Luyten (1936) and found, upon our request, by D. Williams on Harvard plates. This star was also discovered in the ASAS-3 survey and enters their variable-star catalog as a MISC/SR-type star but with a wrong period (116.9d). R = 15.0 on the DSS2 image of 1985-05-23.

28. HV 9066 was discovered by Luyten (1935). No finding chart was available for this variable. We recovered the variable using US Naval Observatory Images. R = 14.0 on the ESO image of 1985-05-26.

29. HV 9067 was discovered by Luyten (1936). No finding chart was available for this variable. We recovered the variable using US Naval Observatory Images. R = 14.0 on the ESO image of 1985-05-23.

30. HV 8734 was discovered by Luyten (1937). This star was found, upon our request, by D. Williams on Harvard plates.

Remarks:
In our work aimed at improvement of the coordinates of variable stars in the NSV catalog (Samus et al. 2007-2012), we checked a number of poorly studied variables and found light elements and types for 30 of them. We were able to study the variables thanks to the publicly available electronic archives of CCD observations of the ASAS-3 project (Pojmanski 2002) and to images of the US Naval Observatory Image and Catalog Archive.

Acknowledgments: Our studies are supported by a grant from the Program "Origin and Evolution of Stars and Galaxies" of the Presidium of Russian Academy of Sciences and by the Russian Foundation for Basic Research.

References:
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