Peremennye Zvezdy

Article in PDF
"Peremennye Zvezdy",
Prilozhenie,
vol. 10, N 24 (2010)

New Variable Stars in the Field of V585 Lyr

T. Kryachko#1, A. Samokhvalov#2, B. Satovskiy#1
#1. Astrotel Observatory, Karachay-Cherkessia, Russia;
#2. Surgut, Russia

ISSN 2221–0474

Received:   26.08.2010;   accepted:   26.10.2010
(E-mail for contact: bredfild@mail.ru, sav@surgut.ru, bs25@mail.ru)

#NameOtherCoord (J2000)TypeMaxMinSystemPeriodEpoch (JD)typeSpCommentL.CurveFind.ChartData
1 USNO-A2.0 1275-1090453719 11 31.33, +40 46 53.2BY:16.6816.88 25.82455282.0349Max Comm. 101_PC-R.png01_chart.jpg01_data.txt
2 USNO-A2.0 1275-1090536719 11 33.04, +40 24 10.2EW17.2417.76 0.331352455370.3055Min Comm. 202_PC-R.png02_chart.jpg02_data.txt
3 USNO-A2.0 1275-1092563119 12 16.36, +40 26 00.4RRAB16.3917.50 0.605072455347.4156Max Comm. 303_PC-R.png03_chart.jpg03_data.txt
4 USNO-A2.0 1275-1092566419 12 16.42, +40 30 22.0BY:14.6514.70 8.0992455265.4367Max Comm. 404_PC-R.png04_chart.jpg04_data.txt
5 USNO-A2.0 1275-1092601619 12 17.23, +40 47 12.5EW15.0415.68 0.362962455349.3110Min Comm. 505_PC-R.png05_chart.jpg05_data.txt
6 USNO-A2.0 1275-1092881719 12 23.30, +40 49 53.4EW15.1515.58 0.364132455292.5621Min Comm. 606_PC-R.png06_chart.jpg06_data.txt
7 USNO-A2.0 1275-1093313319 12 32.50, +40 09 57.7EA/RS16.6716.95 2.561662455257.6757Min Comm. 707_PC-R.png07_chart.jpg07_data.txt
8 USNO-A2.0 1275-1093793519 12 42.65, +40 45 48.9BY:15.0915.16 10.0842455266.5611Max Comm. 808_PC-R.png08_chart.jpg08_data.txt
9 USNO-A2.0 1275-1094029219 12 47.66, +40 53 35.1EA16.8317.53 3.3202:2455361.351Min Comm. 909_PC-R.png09_chart.jpg09_data.txt
10 USNO-A2.0 1275-1094442419 12 56.41, +40 36 22.9EW16.1616.42 0.283142455341.3695Min Comm. 1010_PC-R.png10_chart.jpg10_data.txt
11 USNO-A2.0 1275-1094566019 12 59.21, +40 54 47.8EB15.2015.49 0.449782455349.3761Min Comm. 1111_PC-R.png11_chart.jpg11_data.txt
12 USNO-A2.0 1275-1095360119 13 15.78, +40 08 28.4SR:13.7413.79 22.2:2455339.05Max Comm. 1212_PC-R.png12_chart.jpg12_data.txt
13 USNO-A2.0 1275-1095580919 13 20.34, +40 45 27.8EW16.8417.08 0.270232455345.3211Min Comm. 1313_PC-R.png13_chart.jpg13_data.txt
14 USNO-A2.0 1275-1096569619 13 40.40, +40 49 13.0EW17.2917.56 0.314302455336.3866Min Comm. 1414_PC-R.png14_chart.jpg14_data.txt
15 USNO-A2.0 1275-1097001119 13 49.32, +40 54 47.9EA17.0417.77 1.599:2455258.5226Min Comm. 1515_PC-R.png15_chart.jpg15_data.txt
16 USNO-A2.0 1275-1097039219 13 50.04, +40 55 36.1EW16.8217.53 0.294742455361.3029Min Comm. 1616_PC-R.png16_chart.jpg16_data.txt
17 USNO-A2.0 1275-1097315519 13 55.90, +40 23 50.9EW17.1717.65 0.320202455306.6728Min Comm. 1717_PC-R.png17_chart.jpg17_data.txt
18 USNO-A2.0 1275-1097399019 13 57.68, +40 45 08.9EW19.4720.10 0.236322455275.5533Min Comm. 1818_PC-R.png18_chart.jpg18_data.txt
19 USNO-A2.0 1275-1097605319 14 02.17, +40 26 44.9EW15.6616.27 0.290872455358.3029Min Comm. 1919_PC-R.png19_chart.jpg19_data.txt
20 USNO-A2.0 1275-1097901719 14 08.40, +40 20 34.8EW17.4017.83 0.269782455257.7279Min Comm. 2020_PC-R.png20_chart.jpg20_data.txt
21 USNO-A2.0 1275-1098209119 14 14.50, +40 08 10.1SR:15.6015.65 57.4:2455333.47Max Comm. 2121_PC-R.png21_chart.jpg21_data.txt
22 USNO-A2.0 1275-1098827019 14 27.15, +40 20 00.9BY:17.2517.37 0.75922455258.0797Max Comm. 2222_PC-R.png22_chart.jpg22_data.txt
23 USNO-A2.0 1275-1099437319 14 39.57, +40 39 58.6EA15.6615.87 2.32682455259.5147Min Comm. 2323_PC-R.png23_chart.jpg23_data.txt
24 USNO-A2.0 1275-1100391619 14 58.54, +40 52 46.3EW16.4616.59 0.230772455347.4264Min Comm. 2424_PC-R.png24_chart.jpg24_data.txt
25 USNO-A2.0 1275-1101066819 15 11.82, +40 49 10.5EW19.3120.15 0.240202455275.6128Min Comm. 2525_PC-R.png25_chart.jpg25_data.txt
26 USNO-A2.0 1275-1101433719 15 18.90, +40 45 51.3EW16.3516.49 0.302322455306.5251Min Comm. 2626_PC-R.png26_chart.jpg26_data.txt
27 USNO-A2.0 1275-1102006319 15 30.20, +40 23 43.8EW17.2517.56 0.378852455317.4206Min Comm. 2727_PC-R.png27_chart.jpg27_data.txt
28 USNO-A2.0 1275-1102338019 15 36.92, +40 46 15.6EW14.9615.18 0.625002455349.6696Min Comm. 2828_PC-R.png28_chart.jpg28_data.txt
29 USNO-A2.0 1275-1102360219 15 37.34, +40 10 08.7EW:17.2117.51 0.588052455258.0591Min Comm. 2929_PC-R.png29_chart.jpg29_data.txt
30 USNO-A2.0 1275-1102396519 15 38.05, +40 42 31.8EB15.6415.90 0.857302455257.9702Min Comm. 3030_PC-R.png30_chart.jpg30_data.txt
31 USNO-A2.0 1275-1102486319 15 39.92, +40 42 25.3EW16.3616.66 0.380562455341.3868Min Comm. 3131_PC-R.png31_chart.jpg31_data.txt
32 USNO-A2.0 1275-1102620619 15 42.41, +40 49 36.0DSCT15.0915.15 0.0526322455257.5602Max Comm. 3232_PC-R.png32_chart.jpg32_data.txt
33 USNO-A2.0 1275-1102794519 15 45.96, +40 28 00.8EW17.1317.32 0.340082455258.1838Min Comm. 3333_PC-R.png33_chart.jpg33_data.txt
34 USNO-A2.0 1275-1103006119 15 50.11, +40 29 55.5BY:15.8615.93 4.0672455258.9519Max Comm. 3434_PC-R.png34_chart.jpg34_data.txt
35 USNO-A2.0 1275-1103363519 15 56.96, +40 15 08.2EW17.5718.19 0.4102622455336.3503Min Comm. 3535_PC-R.png35_chart.jpg35_data.txt
36 USNO-A2.0 1275-1104081019 16 11.31, +40 39 10.3EB:14.5214.97 6.52562455267.2601Min Comm. 3636_PC-R.png36_chart.jpg36_data.txt

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)±
2455341.36880.0002
2455347.41560.0005
2455358.30660.0003
2455361.33330.0006


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)±
2455341.32660.0008
2455345.31880.0005
2455349.31100.0002
2455361.28730.0000
MinII=15m.63.

6. O'Connell effect. Minima width and depth are variable. Primary minima:
HJD(TT)±
2455292.56210.0002
2455318.41340.0007
2455326.42880.0007
2455341.35210.0010
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)±
2455341.36950.0003
2455345.33480.0010
2455360.33830.0010
2455362.32460.0010
MinII=16m.41.

11. Primary minima:
HJD(TT)±
2455345.32850.0008
2455349.37610.0006
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
2455345.32110.0008
2455349.377 0.002
2455356.40290.0007
2455358.29440.0008
2455362.34480.0006
MinII=16m.99.

14. Primary minima:
HJD(TT)±
2455306.53260.0004
2455336.38660.0003
2455347.393 0.002
MinII=17m.54.

15. MinII=17m.44.

16. Primary minima:
HJD(TT)±
2455345.38640.0005
2455361.30290.0002
MinII=17m.49.

17. O'Connell effect. MinII=17m.57.

18. MinII=20m.04.

19. O'Connell effect. Primary minima:
HJD(TT)±
2455297.51360.0005
2455306.52940.0003
2455358.30290.0003
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
2455347.42640.0008
MinII=16m.59.

25. MinII=20m.10.

26. O'Connell effect. Primary minima:
HJD(TT)±
2455306.52510.0010
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)±
2455341.38680.0006
2455362.31500.0007
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)±
2455257.56020.0006
2455275.55800.0004
2455292.51150.0004
2455297.511 0.001
2455306.51230.0010
2455311.457 0.001
2455315.403 0.002
2455317.401 0.001
2455318.40230.0009
2455324.45670.0005
2455329.46130.0004
2455336.349 0.001
2455336.403 0.001
2455341.350 0.002
2455341.406 0.002
2455345.35020.0010
2455347.40480.0005
2455348.40310.0009
2455349.3490.001
2455356.40500.0006
2455358.29530.0008
2455360.29400.0009
2455361.35150.0004
2455362.35000.0008
2455370.2980.001


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)±
2455336.35030.0006
2455345.37480.0008
2455347.42410.0007
2455375.32540.0009
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


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