Article in PDF |
"Peremennye Zvezdy", Prilozhenie, vol. 15, N 8 (2015) |
#1. Siberian State Aerospace University, 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 |
Received: 2.01.2014; accepted: 14.12.2015
(E-mail for contact: slovoktk@mail.ru)
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Comments:
1. MinII = 14m.14.
2. MinII = 14m.47.
3. MinII = 15m.05:.
4. MinII = 14m.93.
7. J = 7.006, H = 5 .903, K = 5.415.
The star in the NSVS database: NSVS ID 3421021. The NSVS data confirm the star's type.
8. J = 9.355, H = 8.224, K = 7.845.
9. M–m = 0.2:. J = 11.706, H = 11.128, K = 10.995.
11. MinII = 13m.93.
12. J = 9.579, H = 8.435, K = 7.957.
13. J = 9.609, H = 8.379, K = 7.839.
14. J = 9.386, H = 8.093, K = 7.556.
15. J = 9.152, H = 7.803, K = 7.276.
16. MinII = 14m.5. We observed two minima only. A twice shorter period is also possible.
17. MinII = 15m.7.
18. MinII = 15m.78.
19. J = 8.055, H = 6.901, K = 6.391.
The star in the NSVS database: NSVS ID 3423007. The NSVS data confirm the star's type.
20. MinII = 14m.83.
21. MinII = 15m.84.
23. J = 7.640, H = 6.502, K = 5.876.
The star in the NSVS database: NSVS ID 3424319. The NSVS data confirm the star's type.
24. J = 8.143, H = 6.770, K = 6.017.
25. J = 9.050, H = 7.688, K = 6.936.
26. MinII = 12m.97.
27. MinII = 13m.91. Our observations covered two minima only. Periods of 11d.601, 8d.668 or 8d.287 are also possible.
28. J = 8.438, H = 7.224, K = 6.717.
29. J = 8.551, H = 7.327, K = 6.871.
The star in the NSVS database: NSVS ID 3424943. The NSVS data confirm the star's type.
30. MinII = 16m.00.
31. The first-overtone periodicity of the star: P1 = 0d.079165. P1/P0 = 0.771.
32. MinII = 13m.78.
33. J = 9.227, H = 8.024, K = 7.482.
34. J = 7.963, H = 6.766, K = 6.273.
The star in the NSVS database: NSVS ID 3425981. The NSVS data confirm the star's type.
35. J = 8.937, H = 7.748, K =7.290.
The star in the NSVS database: NSVS ID 3426123. The NSVS data confirm the star's type.
36. MinII = 14m.26. D = 0.16.
37. J = 10.586, H = 10.180, K = 9.854.
38. MinII = 13m.64.
39. J = 8.688, H = 7.383, K = 6.685.
The star in the NSVS database: NSVS ID 3427572. The NSVS data confirm the star's type.
40. J = 9.119, H = 7.806, K = 7.238.
41. J = 7.766, H = 6.495, K = 5.948.
The star in the NSVS database: NSVS ID 3428004. The NSVS data confirm the star's type.
42. J = 8.908, H = 7.339, K = 6.512.
43. J = 9.172, H = 7.764, K = 7.138.
44. J = 8.850, H = 7.428, K = 6.927.
46. J = 8.463, H = 6.919, K = 6.274.
The star in the NSVS database: NSVS ID 3430795. The NSVS data confirm the star's type.Remarks:
Our observations of an area in Cepheus were performed at the observatory of the Siberian State Aerospace University with a Hamilton telescope (D = 400 mm, F = 915 mm) equipped with a FLI ML9000 CCD camera (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 catalogue (Monet et al. 1998).
The J, H, K magnitudes are from the 2MASS catalog (Skrutskie et al. 2006). For most of the stars, the 2MASS catalog is also the source of positions. In some other cases, the positions are from the USNO-B1.0 catalog (Monet et al. 2003). We used VaST (Sokolovsky & Lebedev 2005) 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). For two previously known variables, NSV 13961 and V722 Cep, we present new light elements.
Acknowledgements: This publication makes use of data products from the Two Micron All Sky Survey (2MASS), which is a joint project of the UMass/IPAC-Caltech, funded by the NASA and the NSF,and of the Aladin interactive sky atlas, operated at CDS, Strasbourg, France.References:
Monet, D.G., Bird, A., Canzian, B., et al., 1998, USNO-A2.0, A Catalogue of Astrometric Standards (U.S. Naval Observatory, Washington, DC), Centre de Données Astronomiques de Strasbourg, I/252
Monet, D.G., Levine, S.E., Casian, B., et al., 2003, USNO-B1.0, A Catalog of Astrometric Standards (U.S. Naval Observatory, Washington, DC), Centre de Données Astronomiques de Strasbourg, I/284
Skrutskie, M.F., Cutri, R.M., Stiening, R., et al., 2006, Astron. J., 131, 1163
Sokolovsky, K., Lebedev, A., 2005, in 12th Young Scientists' Conference on Astronomy and Space Physics, Kyiv, Ukraine, April 19–23, 2005, eds.: Simon, A.; Golovin, A., p.79
Woźniak, P.R., Vestrand, W.T., Akerlof, C.W., et al., 2004, Astron. J., 127, 2436