Comments:
1. Infrared colors J–H = 0.622, H–K = 0.219, J–K = 0.841 (2MASS)
are consistent with the
dK spectral type (Bessell and Brett 1988) and BY classification.
2. Primary minima:HJD(TT) | ± |
2455116.416 | 0.002 |
2455120.382 | 0.004 |
2455121.375 | 0.001 |
2455122.368 | 0.003 |
2455123.358 | 0.003 |
2455144.230 | 0.002 |
2455230.333 | 0.001 |
2455516.461 | 0.002 |
MinII=18m.83.
3. IRAS 03114+5653. Infrared colors J–H = 1.598, H–K = 0.765, J–K
= 2.363 (2MASS) are consistent
with the gM spectral type (Bessell and Brett 1988) and SR: classification. Maximum:
HJD(TT) 2455214.30 ± 0.09.
4. O'Connell effect. Primary minima:HJD(TT) | ± |
2455081.3827 | 0.0006 |
2455113.4447 | 0.0008 |
2455115.5475 | 0.0005 |
2455120.2788 | 0.0004 |
2455120.5417 | 0.0004 |
2455123.4327 | 0.0004 |
2455144.4573 | 0.0003 |
2455145.5093 | 0.0004 |
2455162.3283 | 0.0006 |
2455162.5910 | 0.0004 |
2455163.3796 | 0.0003 |
2455168.3725 | 0.0010 |
2455169.4242 | 0.0003 |
2455184.4048 | 0.0004 |
2455196.2290 | 0.0005 |
2455202.2766 | 0.0004 |
2455230.3968 | 0.0004 |
2455254.3135 | 0.0004 |
2455260.3585 | 0.0007 |
2455466.4052 | 0.0002 |
2455467.4553 | 0.0004 |
2455494.2633 | 0.0005 |
2455494.5261 | 0.0006 |
2455504.5133 | 0.0004 |
2455516.6043 | 0.0009 |
2455517.3908 | 0.0003 |
2455518.4419 | 0.0005 |
2455519.4924 | 0.0002 |
MinII = 15m.20.
5. Maxima:HJD(TT) | ± |
2455081.323 |
0.003 |
2455081.3806 | 0.0005 |
2455081.4388 |
0.0005 |
2455084.330 | 0.002 |
2455084.3866 |
0.0009 |
2455084.4442 | 0.0002 |
2455085.370 |
0.001 |
2455109.364 | 0.001 |
2455109.424 |
0.002 |
2455113.470 | 0.002 |
2455142.3792 |
0.0006 |
2455168.225 | 0.001 |
2455168.3411 |
0.0009 |
2455168.399 | 0.001 |
2455168.4564 |
0.0001 |
2455168.5140 | 0.0006 |
2455168.5709 |
0.0002 |
2455169.2085 | 0.0006 |
2455169.3813 |
0.0007 |
2455169.440 | 0.001 |
2455169.4972 |
0.0008 |
2455169.5548 | 0.0009 |
2455169.6125 |
0.0006 |
2455230.4393 | 0.0003 |
2455230.4972 |
0.0009 |
2455254.2036 | 0.0008 |
2455254.261 |
0.001 |
2455254.3183 | 0.0005 |
2455466.2862 |
0.0004 |
2455466.4028 | 0.0008 |
2455466.4601 |
0.0007 |
2455467.3851 | 0.0003 |
2455494.2721 |
0.0009 |
2455494.3291 | 0.0004 |
2455494.5028 |
0.0006 |
2455495.5443 | 0.0006 |
2455504.3353 |
0.0008 |
2455519.3673 | 0.0009 |
2455519.425 |
0.001 |
6. Infrared colors J–H = 0.709, H–K = 0.191, J–K = 0.900 (2MASS)
are consistent with the
K spectral type (Bessell and Brett 1988) and BY: classification.
7. Primary minima:HJD(TT) | ± |
2455081.418 | 0.002 |
2455120.4509 | 0.0007 |
2455123.448 | 0.001 |
2455144.461 | 0.001 |
2455145.3205 | 0.0008 |
2455162.4771 | 0.0010 |
2455163.339 | 0.001 |
2455169.341 | 0.002 |
2455202.361 | 0.002 |
2455230.2400 | 0.0008 |
2455254.2555 | 0.0009 |
2455467.415 | 0.001 |
2455518.4507 | 0.0005 |
MinII
= 16m.95.
8. MinII = 14m.75.
9. Primary minima:HJD(TT) | ± |
2455081.437 | 0.001 |
2455109.3400 | 0.0002 |
2455113.509 | 0.002 |
2455115.426 | 0.002 |
2455116.395 | 0.002 |
2455120.5641 | 0.0008 |
2455121.5244 | 0.0009 |
2455122.4884 | 0.0007 |
2455123.4463 | 0.0009 |
2455144.2906 | 0.0007 |
2455145.253 | 0.001 |
2455145.578 | 0.001 |
2455162.568 | 0.003 |
2455163.5350 | 0.0009 |
2455230.233 | 0.001 |
2455495.434 | 0.002 |
2455497.359 | 0.001 |
2455504.404 | 0.002 |
2455517.5526 | 0.0009 |
2455518.518 | 0.002 |
MinII = 17m.26.
10. Primary minima:HJD(TT) | ± |
2455116.388 | 0.003 |
2455121.480 | 0.001 |
2455162.4874 | 0.0010 |
2455168.477 | 0.001 |
2455202.3051 | 0.0005 |
2455230.442 | 0.002 |
2455466.342 | 0.001 |
2455504.3571 | 0.0007 |
MinII
= 13m.39.
11. Primary minima:HJD(TT) | ± |
2455109.355 | 0.002 |
2455114.374 | 0.001 |
2455115.5301 | 0.0008 |
2455116.302 | 0.002 |
2455144.454 | 0.001 |
2455145.2194 | 0.0009 |
2455162.577 | 0.002 |
2455169.5118 | 0.0004 |
2455202.297 | 0.001 |
2455230.4455 | 0.0005 |
2455466.459 | 0.001 |
2455518.5110 | 0.0009 |
MinII
= 16m.16.
12. Primary minimum: HJD(TT) 2455494.399 ± 0.002. MinII = 13m.83.
13. O'Connell effect. Primary minima:HJD(TT) | ± |
2455084.420 | 0.001 |
2455109.345 |
0.002 |
2455115.375 | 0.002 |
2455116.5799 | 0.0005 |
2455121.4045 | 0.0006 |
2455123.4133 | 0.0005 |
2455142.3062 | 0.0010 |
2455144.3155 | 0.0008 |
2455145.5221 | 0.0004 |
2455162.4015 | 0.0008 |
2455163.2013 | 0.0010 |
2455163.6062 | 0.0007 |
2455169.236 | 0.001 |
2455230.3297 | 0.0008 |
2455467.4784 | 0.0007 |
2455504.4630 | 0.0009 |
2455516.5124 | 0.0007 |
2455518.5234 | 0.0009 |
MinII = 16m.52.
14. Primary minima:HJD(TT) | ± |
2455115.404 | 0.001 |
2455121.509 | 0.002 |
2455144.357 | 0.001 |
2455163.3834 | 0.0007 |
2455466.4409 | 0.0010 |
2455517.446 | 0.001 |
MinII = 17m.60.
15. Primary minimum: HJD(TT) 2455116.402 ± 0.001.
Remarks:
During observations of a field in Perseus, we discovered fifteen new variable stars.
Our observations were carried out at the Astrotel-Caucasus observatory, located at
the Astronomical
station of the Kazan Federal university, using the 300-mm Ritchey-Chretien telescope,
equipped with an unfiltered Apogee Alta U9000 CCD camera. A total of 2316 images
with
5-minute exposures were obtained on JD 2455080–2455519. For basic reductions
for
dark current, flat fields, bias, and for removing cosmic rays 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 1425-04237176 = USNO-B1.0
1473-0129296
(α=03h15m37s.41, δ=+57°19′ 36″.5,
J2000; 2MASS), R1 = 14m.33, R2 = 14m.60
(USNO-B1.0). Unfiltered magnitudes were calibrated using the comparison star, assuming
Rcomp = 14m.465.
The coordinates of the variable stars in the table were drawn from the 2MASS catalogue
(Skrutskie et al. 2006). To search for period and derive epochs of extrema, we use
Peranso
software.
Acknowledgements: We would like to thank S. V. Antipin for helpful
discussion.
References:
Bessell, M.S., Brett, J.M., 1988, PASP, 100, 1134
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