Article in PDF |
"Peremennye Zvezdy", Prilozhenie, vol. 18, N 1 (2018) |
#1. Siberian State University of Science and Technologies, Krasnoyarsk, Russia;
#2. Institute of Astronomy, Russian Academy of Sciences, Moscow, Russia #3. Sternberg Astronomical Institute, Lomonosov Moscow State University, Moscow, Russia; |
ISSN 2221–0474 | DOI: 10.24411/2221-0474-2018-00001 |
Received: 2.01.2014; accepted: 9.02.2018
(E-mail for contact: slovoktk@mail.ru)
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Comments:
1. MinII = 14m.05.
3. MinII = 13m.22.
4. J = 9m.723, H = 8m.569, K = 8m.104 (2MASS).
5. M–m = 0.17 P.
6. MinII = 15m.22.
7. J = 11m.806, H = 11m.098, K = 10m.847 (2MASS).
8. J = 11m.243, H = 10m.751, K = 10m.64 (2MASS).
1RXS J215522.8+593843, r = 12.9431 arcmin.
9. J = 8m.495, H = 7m.428, K = 7m.05 (2MASS).
The star in the NSVS database: NSVS ID 3422019 and NSVS ID 3375758. The NSVS data confirm the star's type.
10. MinII = 15m.64.
11. J = 8m.622, H = 7m.431, K = 6m.966 (2MASS).
12. MinII = 13m.49.
14. MinII = 15m.31.
15. J = 8m.878, H = 7m.746, K = 7m.35 (2MASS).
The star in the NSVS database: NSVS ID 3423367 and NSVS ID 3377198. The NSVS data confirm the star's type.
16. The twice longer period is possible, then variability type is EW.
17. MinII = 15m.16. D = 0.17 P.
18. MinII = 15m.53. D = 0.22 P.
19. MinII = 15m.15.
20. J = 7m.663, H = 6m.552, K = 6m.055 (2MASS).
The star in the NSVS database: NSVS ID 3424540. The NSVS data confirm the star's type.
21. J = 9m.472, H = 8m.29, K = 7m.863 (2MASS).
22. J = 8m.369, H = 7m.196, K = 6m.751 (2MASS).
The star in the NSVS database: NSVS ID 3425391. The NSVS data confirm the star's type.
23. J = 10m.349, H = 8m.935, K = 8m.337 (2MASS).
24. J = 10m.746, H = 9m.938, K = 9m.588 (2MASS).
27. MinII = 12m.73.
30. J = 7m.456, H = 6m.428, K = 5m.908 (2MASS).
The star in the NSVS database: NSVS ID 3382261. The NSVS data confirm the star's type.
31. MinII = 12m.81.
32. J = 11m.877, H = 11m.686, K = 11m.443 (2MASS).
The star in the NSVS database: NSVS ID 3428174. The NSVS data confirm the star's type.
33. J = 8m.464, H = 7m.325, K = 6m.86 (2MASS).
The star in the NSVS database: NSVS ID 3382875. The NSVS data confirm the star's type.
34. J = 7m.647, H = 6m.574, K = 6m.093 (2MASS).
The star in the NSVS database: NSVS ID 3428607. The NSVS data confirm the star's type.
35. J = 8m.689, H = 7m.268, K = 6m.644 (2MASS).
36. J = 8m.562, H = 7m.407, K = 6m.966 (2MASS).
The star in the NSVS database: NSVS ID 3383833. The NSVS data confirm the star's type.
37. The period of 2d.25147 is possible as well.
38. J = 13m.155, H = 12m.864, K = 12m.668 (2MASS).
The star is not identical to its nearest neighbor Mis V1308.
39. J = 7m.511, H = 6m.412, K = 6m.015 (2MASS).
40. MinII = 12m.30.
The star in the NSVS database: NSVS ID 3384698 and NSVS ID 3430508. The NSVS data confirm the star's type.
41. J = 9m.429, H = 7m.908, K = 7m.094 (2MASS).
42. MinII = 13m.99. MinII – MinI = 0.54 P.
43. MinII = 14m.62.
44. MinII = 15m.70.
45. J = 9m.078, H = 7m.866, K = 7m.456 (2MASS).
46. J = 9m.298, H = 8m.145, K = 7m.7 (2MASS).Remarks:
We present the second part of our discoveries of variable stars in Cepheus. Our observations of an area in Cepheus were performed in the observatory of the Siberian State University of Science and Technologies with a Hamilton telescope (D = 400 mm, F = 915 mm) equipped with an FLI ML9000 CCD chip (3056×3056 pixels, pixel size 12 μm). We obtained unfiltered CCD observations during two time intervals from September to October 2012 and from August to November 2013. Exposure times were 30 seconds for all frames. The size of the field is 2°.3×2°.3. The magnitudes were referred to red magnitudes of comparison stars from the USNO-A2.0 catalog (Monet et al. 1998). We used VaST (Sokolovsky & Lebedev 2018) software to search for new variable stars. To find periods, we applied WinEfk software provided by Dr. V.P. Goranskij. Observations for several stars can also be found in the ROTSE-I/NSVS survey (Woźniak et al. 2004).
Acknowledgements: The authors wish to thank Dr. V.P. Goranskij for providing his efficient period-search software and Dr. K.V. Sokolovsky for providing VaST (a software package for detection of variable objects on a series of astronomical images). This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the UMass/IPAC-Caltech, funded by the NASA and the NSF, and the Aladin interactive sky atlas, operated at CDS, Strasbourg, France.References:
Monet, D., Bird, A., Canzian, B., et al., 1998, USNO-A2.0, A Catalog of Astrometric Standards (U.S. Naval Observatory, Washington, DC), Centre de Données Astronomiques de Strasbourg, I/252
Sokolovsky, K. V., Lebedev, A. A., 2018, Astron. and Computing, 22, 28
Woźniak, P. R., Vestrand, W. T., Akerlof, C. W., et al., 2004, Astron. J., 127, 2436