Comments:
1. Infrared colors J-H=0.603, H-K=0.121, J-K=0.724 (2MASS) are consistent with
the
dK spectral type (Bessell and Brett 1988) and BY: classification.
2. O'Connell effect. Primary minimum: HJD(TT) 2455370.3055. MinII=17m.72.
3. Maxima:HJD(TT) | ± |
2455341.3688 | 0.0002 |
2455347.4156 | 0.0005 |
2455358.3066 | 0.0003 |
2455361.3333 | 0.0006 |
4. Infrared colors J-H=0.507, H-K=0.088, J-K=0.595 (2MASS) are consistent with
the
dK spectral type (Bessell and Brett 1988) and BY: classification.
5. A close pair of two stars, USNO-A2.0 1275-10926016 and 2MASS 19121720+4047081.
USNO-A2.0 1275-10926016 varies. Primary minima:HJD(TT) | ± |
2455341.3266 | 0.0008 |
2455345.3188 | 0.0005 |
2455349.3110 | 0.0002 |
2455361.2873 | 0.0000 |
MinII=15m.63.
6. O'Connell effect. Minima width and depth are variable. Primary minima:HJD(TT) | ± |
2455292.5621 | 0.0002 |
2455318.4134 | 0.0007 |
2455326.4288 | 0.0007 |
2455341.3521 | 0.0010 |
2455345.357 | 0.002 |
2455349.363 | 0.001 |
2455373.394 | 0.001 |
MinII=15m.49.
7. MinII=16m.85.
8. Infrared colors J-H=0.606, H-K=0.155, J-K=0.761 (2MASS) are consistent with
the
dK spectral type (Bessell and Brett 1988) and BY classification.
9. Primary minimum: HJD(TT) 2455361.351 ± 0.001. Periods 2.2148 d or 2.8458
d
are possible.
10. O'Connell effect. Primary minima:HJD(TT) | ± |
2455341.3695 | 0.0003 |
2455345.3348 | 0.0010 |
2455360.3383 | 0.0010 |
2455362.3246 | 0.0010 |
MinII=16m.41.
11. Primary minima:HJD(TT) | ± |
2455345.3285 | 0.0008 |
2455349.3761 | 0.0006 |
MinII=15m.42.
12. Infrared colors J-H=0.839, H-K=0.213, J-K=1.052 (2MASS) are consistent with
the
gM spectral type (Bessell and Brett 1988) and SR: classification.
13. Primary minima:HJD(TT) | ± |
2455336.403 | 0.001 |
2455345.3211 | 0.0008 |
2455349.377 | 0.002 |
2455356.4029 | 0.0007 |
2455358.2944 | 0.0008 |
2455362.3448 | 0.0006 |
MinII=16m.99.
14. Primary minima:HJD(TT) | ± |
2455306.5326 | 0.0004 |
2455336.3866 | 0.0003 |
2455347.393 | 0.002 |
MinII=17m.54.
15. MinII=17m.44.
16. Primary minima:HJD(TT) | ± |
2455345.3864 | 0.0005 |
2455361.3029 | 0.0002 |
MinII=17m.49.
17. O'Connell effect. MinII=17m.57.
18. MinII=20m.04.
19. O'Connell effect. Primary minima:HJD(TT) | ± |
2455297.5136 | 0.0005 |
2455306.5294 | 0.0003 |
2455358.3029 | 0.0003 |
2455360.339 | 0.001 |
MinII=16m.15.
20. A close pair of two stars, 2MASS 19140848+4020346 and 2MASS 19140816+4020348.
The angular resolution of our telescope is insufficient for determine which of the
two stars
varies. MinII=17m.83.
21. A close pair of two stars, USNO-A2.0 1275-10982091 and a fainter one (18m.2R),
USNO-B1.0 1301-0318277. Maximum: HJD(TT) 2455333.47 ± 0.05.
22. Infrared colors J-H=0.622, H-K=0.000, J-K=0.622 (2MASS) are consistent with
the
K spectral type (Bessell and Brett 1988) and BY: classification.
23. Twice shorter period 1.1634 d is possible. Primary minimum: HJD(TT)2455315.356±0.002.
MinII=15m.81.
24. Primary minima:HJD(TT) | ± |
2455345.344 | 0.001 |
2455347.4264 | 0.0008 |
MinII=16m.59.
25. MinII=20m.10.
26. O'Connell effect. Primary minima:HJD(TT) | ± |
2455306.5251 | 0.0010 |
2455317.408 |
0.001 |
MinII=16m.44.
27. Primary minima:HJD(TT) | ± |
2455317.413 | 0.001 |
2455336.356 | 0.003 |
MinII=17m.52.
28. Primary minimum: HJD(TT) 2455318.417±0.001. MinII=15m.16.
29. A close pair of two stars, USNO-A2.0 1275-11023602 and a faint star, not found
in any catalogues. USNO-A2.0 1275-11023602 varies. Periods 0.29403 d or 0.22709 d
(type RRC) are possible.
30. MinII=15m.80.
31. A close pair of two stars, USNO-A2.0 1275-11024863 and 2MASS 19153955+4042284.
Presumably USNO-A2.0 1275-11024863 varies. Primary minima:HJD(TT) | ± |
2455341.3868 | 0.0006 |
2455362.3150 | 0.0007 |
2455370.306 | 0.002 |
MinII=16m.62.
32. A close pair of two stars, USNO-A2.0 1275-11026206 and 2MASS 19154230+4049300.
USNO-A2.0 1275-11026206 varies. Infrared colors of USNO-A2.0 1275-11026206 (J-H=0.164,
H-K=0.003, J-K=0.167 (2MASS)) are consistent with the dF spectral type (Bessell and
Brett 1988) and DSCT classification. 1-day alias period 0.055562 d is also possible.
Maxima:HJD(TT) | ± |
2455257.5602 | 0.0006 |
2455275.5580 | 0.0004 |
2455292.5115 | 0.0004 |
2455297.511 | 0.001 |
2455306.5123 | 0.0010 |
2455311.457 | 0.001 |
2455315.403 | 0.002 |
2455317.401 | 0.001 |
2455318.4023 | 0.0009 |
2455324.4567 | 0.0005 |
2455329.4613 | 0.0004 |
2455336.349 | 0.001 |
2455336.403 | 0.001 |
2455341.350 | 0.002 |
2455341.406 | 0.002 |
2455345.3502 | 0.0010 |
2455347.4048 | 0.0005 |
2455348.4031 | 0.0009 |
2455349.349 | 0.001 |
2455356.4050 | 0.0006 |
2455358.2953 | 0.0008 |
2455360.2940 | 0.0009 |
2455361.3515 | 0.0004 |
2455362.3500 | 0.0008 |
2455370.298 | 0.001 |
33. MinII=17m.32.
34. Infrared colors J-H=0.503, H-K=0.089, J-K=0.592 (2MASS) are consistent with
the
dK spectral type (Bessell and Brett 1988) and BY: classification.
35. O'Connell effect. Primary minima:HJD(TT) | ± |
2455336.3503 | 0.0006 |
2455345.3748 | 0.0008 |
2455347.4241 | 0.0007 |
2455375.3254 | 0.0009 |
MinII=18m.16.
36. O'Connell effect. MinII=14m.71.
Remarks:
During observations of the field of the cataclysmic variable V585 Lyr, we discovered
36 new variable stars.
Our observations were carried out at the Astrotel-Caucasus observatory using the
300-mm
Ritchey-Chretien telescope, equipped with an unfiltered Apogee Alta U9000 CCD camera.
A total of 648 images with 5-minute exposures were obtained on JD 2455257 - 2455387.
For basic reductions for dark current, flat fields, bias, and for removing cosmic-ray
hits, we used IRAF routines.
For search and photometry of new variable stars, we applied VaST software by Sokolovsky
and
Lebedev (2005). The comparison star was USNO-A2.0 1275-10940607 = USNO-B1.0 1309-0324923
(α=19h12m48s.37, δ=+40°58′ 59″.9
J2000, 2MASS);
R1=14m.49, R2=14m.15
(USNO-B1.0). Unfiltered magnitudes were calibrated using the comparison star, assuming
Rcomp=14m.32.
The coordinates of the variable stars in the table were drawn from the 2MASS catalogue
(Skrutskie et al. 2006) except for the stars USNO-A2.0 1275-10970011, USNO-A2.0 1275-10973990,
USNO-A2.0 1275-10979017,
USNO-A2.0 1275-11010668; their coordinates were drawn from the USNO-A2.0 catalogue
(Monet et al. 1998).
For search for periods and epochs of extrema, we use Peranso software (www.peranso.com).
Acknowledgements: We would like to thank S. V. Antipin and N. N. Samus for helpful
discussion.
References:
Bessell, M.S., Brett, J.M., 1988, PASP, 100, 1134
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 Donnees Astronomiques
de
Strasbourg, I/252
Skrutskie, M.F., Cutri, R.M., Stiening, R., et al., 2006, AJ, 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