Peremennye Zvezdy

Article in PDF
"Peremennye Zvezdy",
Prilozhenie,
vol. 12, N 15 (2012)

New Variable Stars in Ophiuchus II

V. Solovyov#1, A. Samokhvalov#2, B. Satovskiy#3
#1. Kazan Federal University, Kazan, Russia;
#2. Surgut, Russia;
#3. Astrotel Observatory, Karachay-Cherkessia, Russia

ISSN 2221–0474

Received:   16.07.2012;   accepted:   22.11.2012
(E-mail for contact: solo.vya@gmail.com, sav@surgut.ru, bs25@mail.ru)

#NameOtherCoord (J2000)TypeMaxMinSystemPeriodEpoch (JD)typeSpCommentL.CurveFind.ChartData
1 USNO-A2.0 0675-2037889217 34 57.50, -18 37 31.2RRC15.6816.30 0.3748002454968.553Max Comm. 101_PC-R.png01_chart.jpg01_data.txt
2 USNO-A2.0 0675-2038796817 35 00.64, -18 21 09.1EA15.4716.25 0.9527592455342.5086Min Comm. 202_PC-R.png02_chart.jpg02_data.txt
3 USNO-A2.0 0675-2042271717 35 12.43, -17 46 18.8EW13.8014.53 0.4681442455284.559Min Comm. 303_PC-R.png03_chart.jpg03_data.txt
4 USNO-A2.0 0675-2043539917 35 16.76, -17 58 48.8RRC15.0715.48 0.2646322455342.4444Max Comm. 404_PC-R.png04_chart.jpg04_data.txt
5 USNO-A2.0 0675-2045567017 35 23.88, -18 08 30.1RRAB15.3416.40 0.4448592455352.367Max Comm. 505_PC-R.png05_chart.jpg05_data.txt
6 USNO-A2.0 0675-2045856817 35 24.90, -18 02 23.8RRC15.3515.92 0.3254422454969.457Max Comm. 606_PC-R.png06_chart.jpg06_data.txt
7 USNO-A2.0 0675-2048418717 35 33.96, -18 19 53.1SR:13.6214.58 1662455308.8Max Comm. 707_PC-R.png07_chart.jpg07_data.txt
8 USNO-A2.0 0675-2050057217 35 39.60, -18 35 36.4SR:14.0015.53 1242455361.7Max Comm. 808_PC-R.png08_chart.jpg08_data.txt
9 2MASS 17354166-175015117 35 41.67, -17 50 15.2RRAB15.0016.22 0.5130332455279.5889Max Comm. 909_PC-R.png09_chart.jpg09_data.txt
10 2MASS 17354422-180714017 35 44.22, -18 07 14.1RRAB14.3115.35 0.4949192455280.020Max Comm. 1010_PC-R.png10_chart.jpg10_data.txt
11 USNO-A2.0 0675-2051763817 35 45.13, -17 59 28.9RRAB16.1817.22 0.6473742454968.866Max  11_PC-R.png11_chart.jpg11_data.txt
12 USNO-A2.0 0675-2056507617 36 01.02, -18 00 35.0EB16.2417.10 0.4216342455351.4569Min Comm. 1212_PC-R.png12_chart.jpg12_data.txt
13 USNO-A2.0 0675-2056583217 36 01.30, -18 32 05.1RRAB15.0816.12 0.4406152455023.3909Max Comm. 1313_PC-R.png13_chart.jpg13_data.txt
14 2MASS 17360290-182626017 36 02.91, -18 26 26.0RRC15.6216.16 0.2798812455769.3212Max Comm. 1414_PC-R.png14_chart.jpg14_data.txt
15 USNO-A2.0 0675-2058363317 36 07.04, -18 37 40.8EA14.6815.69 0.7510222455398.3820Min Comm. 1515_PC-R.png15_chart.jpg15_data.txt
16 USNO-A2.0 0675-2058486817 36 07.47, -18 08 27.9SR12.8414.41 1532455735.5Max Comm. 1616_PC-R.png16_chart.jpg16_data.txt
17 USNO-A2.0 0675-2058670617 36 08.16, -18 02 40.6SR:13.2915.08 95.82455363.6Max Comm. 1717_PC-R.png17_chart.jpg17_data.txt
18 USNO-A2.0 0675-2059008717 36 09.25, -18 16 35.8RRAB15.0516.16 0.4997952454968.514Max Comm. 1818_PC-R.png18_chart.jpg18_data.txt
19 USNO-A2.0 0675-2060632617 36 14.72, -18 20 16.4SR:13.4414.50 137.82455398.4Max Comm. 1919_PC-R.png19_chart.jpg19_data.txt
20 USNO-A2.0 0675-2062123417 36 19.86, -18 37 33.1EB15.4415.93 0.5793332455352.3550Min Comm. 2020_PC-R.png20_chart.jpg20_data.txt
21 2MASS 17362037-180608617 36 20.37, -18 06 08.7EA14.2115.08 0.9827052455712.4801Min Comm. 2121_PC-R.png21_chart.jpg21_data.txt
22 USNO-A2.0 0675-2063496817 36 24.55, -18 16 34.9RRC15.1215.44 0.4322442454968.575Max  22_PC-R.png22_chart.jpg22_data.txt
23 USNO-A2.0 0675-2065882617 36 32.94, -18 14 50.7RRAB16.0217.31 0.5036422454969.4772Max Comm. 2323_PC-R.png23_chart.jpg23_data.txt
24 USNO-A2.0 0675-2066209917 36 34.21, -18 33 06.4SR12.5812.97 45.42455761.0Max Comm. 2424_PC-R.png24_chart.jpg24_data.txt
25 USNO-A2.0 0675-2067698017 36 39.28, -17 50 40.5SR:13.5614.95 1852455002Max Comm. 2525_PC-R.png25_chart.jpg25_data.txt
26 USNO-A2.0 0675-2067751117 36 39.49, -18 29 17.9EW16.0416.70 0.3033382455283.5590Min Comm. 2626_PC-R.png26_chart.jpg26_data.txt
27 USNO-A2.0 0675-2069954117 36 47.35, -18 14 55.9RRC15.3515.85 0.3049422455342.4026Max Comm. 2727_PC-R.png27_chart.jpg27_data.txt
28 USNO-A2.0 0675-2070219217 36 48.31, -18 08 44.4RRAB14.9616.45 0.4486072455302.533Max Comm. 2828_PC-R.png28_chart.jpg28_data.txt
29 USNO-A2.0 0675-2070506017 36 49.27, -17 50 26.2RRC15.8116.50 0.3568202454968.593Max Comm. 2929_PC-R.png29_chart.jpg29_data.txt
30 2MASS 17364943-182809417 36 49.44, -18 28 09.5RRAB15.3516.22 0.5565792455279.5689Max Comm. 3030_PC-R.png30_chart.jpg30_data.txt
31 USNO-A2.0 0675-2073398917 36 59.41, -18 06 26.4SR:11.9513.40 1412455333Max Comm. 3131_PC-R.png31_chart.jpg31_data.txt
32 USNO-A2.0 0675-2076628217 37 10.49, -18 31 10.5RRAB15.1015.80 0.5838142455713.454Max Comm. 3232_PC-R.png32_chart.jpg32_data.txt
33 USNO-A2.0 0675-2076706717 37 10.69, -17 48 07.9RRAB16.1017.31 0.5069362454968.5345Max  33_PC-R.png33_chart.jpg33_data.txt
34 USNO-A2.0 0675-2077542817 37 13.68, -18 05 59.2RRAB15.2016.09 0.5892932455367.4638Max Comm. 3434_PC-R.png34_chart.jpg34_data.txt
35 USNO-A2.0 0675-2082604617 37 31.61, -18 10 07.7SR:14.7016.30 153.52455745.9Max Comm. 3535_PC-R.png35_chart.jpg35_data.txt
36 USNO-A2.0 0675-2083987917 37 36.90, -17 46 31.8EB15.6816.58 0.8352982454968.9593Min Comm. 3636_PC-R.png36_chart.jpg36_data.txt
37 USNO-A2.0 0675-2084715117 37 39.81, -18 21 16.2RRC14.5714.84 0.4544972455279.521Max Comm. 3737_PC-R.png37_chart.jpg37_data.txt
38 2MASS 17374620-175220117 37 46.21, -17 52 20.1RRAB14.9715.65 0.5905492455713.986Max Comm. 3838_PC-R.png38_chart.jpg38_data.txt
39 USNO-A2.0 0675-2090511217 38 02.64, -18 17 46.6RRAB13.9314.44 0.8919472454970.370Max  39_PC-R.png39_chart.jpg39_data.txt
40 USNO-A2.0 0675-2090806417 38 03.75, -17 50 01.2RRAB15.0516.20 0.5071672455713.4253Max Comm. 4040_PC-R.png40_chart.jpg40_data.txt
41 USNO-A2.0 0675-2090843417 38 03.89, -18 28 58.5RRAB15.3916.67 0.4885252455378.419Max Comm. 4141_PC-R.png41_chart.jpg41_data.txt
42 USNO-A2.0 0675-2092003717 38 08.50, -17 51 42.6RRAB15.8216.77 0.5390782455713.511Max Comm. 4242_PC-R.png42_chart.jpg42_data.txt
43 USNO-A2.0 0675-2093667817 38 15.08, -18 01 28.8RRAB15.0415.42 0.7083292455713.3820Max Comm. 4343_PC-R.png43_chart.jpg43_data.txt
44 USNO-A2.0 0675-2094417617 38 17.88, -18 32 08.6M:13.2315.85 1632455334Max Comm. 4444_PC-R.png44_chart.jpg44_data.txt
45 USNO-A2.0 0675-2094496817 38 18.16, -18 20 01.0RRC15.8216.35 0.2707442455378.414Max Comm. 4545_PC-R.png45_chart.jpg45_data.txt
46 USNO-A2.0 0675-2094639317 38 18.66, -18 36 13.3RRAB16.4517.60 0.6316482455352.3857Max Comm. 4646_PC-R.png46_chart.jpg46_data.txt
47 2MASS 17382196-181453317 38 21.97, -18 14 53.4RRAB15.2016.20 0.6558502455342.4095Max Comm. 4747_PC-R.png47_chart.jpg47_data.txt
48 USNO-A2.0 0675-2096940617 38 27.38, -18 23 03.3RRAB15.7616.91 0.5111352455279.5690Max Comm. 4848_PC-R.png48_chart.jpg48_data.txt
49 USNO-A2.0 0675-2099854017 38 38.20, -17 46 15.2RRAB15.4016.48 0.6691452455713.3739Max Comm. 4949_PC-R.png49_chart.jpg49_data.txt
50 USNO-A2.0 0675-2100330117 38 39.76, -18 07 45.9RRAB15.1615.91 0.5199992455713.4329Max Comm. 5050_PC-R.png50_chart.jpg50_data.txt

Comments:


1. Type EB with period 0d.749593 is not excluded.

2. Primary minimum: HJD(TT) 2455342.5086 ±0.0005. MinII = 15m.69.

3. Primary minima:
HJD(TT)±
2455284.559 0.002
2455398.3140.001
2455713.37600.0003

MinII = 14m.52.

4. A close pair of two stars, not separated in major catalogues.
Maxima:
HJD(TT)±
2455342.44440.0005
2455351.43450.0004
2455378.42910.0008
2455713.45910.0006
2455769.3060.001


5. The star shows Blazhko effect with the period 36d, resulting from beating of two oscillations: with the tabulated period and with a close period, 0d.470509.
Maxima:
HJD(TT)±
2455302.490 0.002
2455352.367 0.003
2455367.463 0.003
2455760.293 0.004


6. Maxima:
HJD(TT)±
2454969.457 0.005
2455284.516 0.004
2455342.448 0.008
2455711.474 0.004
2455713.431 0.005


7. Infrared colors J–H = 1.041, H–K = 0.340, J–K = 1.381 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and SR: classification.
Maximum: HJD(TT) 2455308.8.

8. Infrared colors J–H = 0.891, H–K = 0.314, J–K = 1.205 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and SR: classification.
Maximum: HJD(TT) 2455356.5.

9. A close pair of two stars: 2MASS 17354166-1750151 and 2MASS 17354195-1750175. 2MASS 17354166-1750151 varies.
Maxima:
HJD(TT)±
2455279.58890.0010
2455351.43410.0008


10. A close pair of two stars: 2MASS 17354422-1807140 and 2MASS 17354406-1807193. 2MASS 17354422-1807140 varies.
Maximum: HJD(TT) 2455279.535±0.004.

12. Primary minima:
HJD(TT)±
2455351.457 0.004
2455769.294 0.001

MinII = 16m.47.

13. Maxima:
HJD(TT)±
2455023.39090.0001
2455342.40330.0009
2455398.35790.0009
2455713.39710.0007


14. Maximum: HJD(TT) 2455769.3212±0.0006.

15. Primary minimum: HJD(TT) 2455398.3820±0.0003. MinII = 14m.96.

16. Infrared colors J–H = 1.000, H–K = 0.384, J–K = 1.384 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and SR classification.
Maximum: HJD(TT) 2455735.5.

17. A close pair of two stars, not separated in major catalogues. Infrared colors J–H = 0.950, H–K = 0.392, J–K = 1.342 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and SR: classification.
Maximum: HJD(TT) 2455363.6.

18. Maxima:
HJD(TT)±
2454968.514 0.003
2455352.349 0.003
2455398.346 0.004


19. Infrared colors J–H = 0.946, H–K = 0.402, J–K = 1.348 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and SR: classification.
Maxima: HJD(TT) 2455019.0; 2455398.4.

20. Primary minima:
HJD(TT)±
2455352.35500.0008
2455378.427 0.002

MinII = 15m.93.

21. Primary minima:
HJD(TT)±
2455712.480 0.004
2455713.46720.0006

MinII = 14m.44.

23. Maxima:
HJD(TT)±
2454969.47720.0009
2455023.36980.0009
2455378.43680.0006


24. Infrared colors J–H = 0.717, H–K = 0.237, J–K = 0.954 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and SR classification.
Maxima: HJD(TT) 2455349.7; 2455761.0.

25. Infrared colors J–H = 0.988, H–K = 0.506, J–K = 1.494 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and SR: classification.
Maxima: HJD(TT) 2455374.8, 2455002.0, 2455744.0.

26. Primary minima:
HJD(TT)±
2455283.55900.0007
2455342.403 0.001
2455699.43690.0007
2455713.38940.0005

MinII = 16m.70.

27. Maxima:
HJD(TT)±
2454969.455 0.001
2455342.40260.0007
2455769.313 0.002


28. The star shows Blazhko effect with the period 28d.58, resulting from beating of two oscillation: with the tabulated period and with a close period, 0d.455761.
Maxima:
HJD(TT)±
2455302.51500.0006
2455351.43480.0007
2455713.463 0.001


29. Type EB with period 0d.713648 is not excluded.

30. Maxima:
HJD(TT)±
2455279.56890.0009
2455342.472 0.005


31. Infrared colors J–H = 0.814, H–K = 0.359, J–K = 1.173 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and SR: classification.
Maxima: HJD(TT) 2455333; 2455756.

32. Maxima:
HJD(TT)±
2455699.455 0.001
2455713.454 0.004


34. Maxima:
HJD(TT)±
2455367.46380.0008
2455713.37780.0005
2455772.30960.0008


35. Infrared colors J–H = 1.025, H–K = 0.383, J–K = 1.408 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and SR: classification.
Maximum: HJD(TT) 2455745.9.

36. MinII = 16m.19.

37. Maximum: HJD(TT) 2455279.521± 0.001.

38. A close triplet of stars 2MASS 17374620-1752201, 2MASS 17374599-1752169 and 2MASS 17374592-1752206. 2MASS 17374620-1752201 varies.

40. A close pair of two stars: USNO-A2.0 0675-20908064 and 2MASS 17380400-1750036. USNO-A2.0 0675-20908064 varies. Blazhko effect, available observations are insufficient to determine the Blazhko period.
Maxima:
HJD(TT)±
2455367.493 0.002
2455713.42530.0008


41. Maximum HJD(TT) 2455378.419±0.002.

42. Maxima:
HJD(TT)±
2455699.498 0.002
2455713.4950.001


43. Maxima:
HJD(TT)±
2455351.441 0.007
2455713.382 0.008


44. A close pair of two stars, not separated in major catalogues. Infrared colors J–H = 0.924, H–K = 0.394, J–K = 1.318 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and M classification.
Maxima: HJD(TT) 2454999.0; 2455334.0.

45. Maxima:
HJD(TT)±
2455342.407 0.009
2455378.414 0.001


46. Maxima:
HJD(TT)±
2455283.539 0.005
2455352.38570.0004


47. Maximum: HJD(TT) 2455342.4095±0.0050.

48. Maxima:
HJD(TT)±
2455279.56900.0009
2455342.441 0.002
2455367.48500.0009


49. Blazhko effect, available observations are insufficient to determine the Blazhko period.
Maximum: HJD(TT) 2455713.3739±0.0008.

50. Maximum: HJD(TT) 2455713.4329±0.0020.

Remarks:
During observations of a field in Ophiuchus, we discovered 50 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 648 images with 5-minute exposures were obtained on JD 2454968–2455772. For basic reductions for dark current, flat fields and bias, 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 0675-20424709 = USNO-B1.0 0719-0588525 (α=17h35m13s.23,
δ= – 18°03′ 24″.0 (J2000, 2MASS)), R1=12m.93, R2=13m.72 (USNO-B1.0). Unfiltered magnitudes were calibrated using the comparison star, assuming Rcomp=13m.325. The coordinates of the variable stars in the table were drawn from the 2MASS catalogue (Skrutskie et al. 2006). For search for periods and epochs of extrema, we use Peranso software (www.peranso.com); in order to find Blazhko-effect periods for USNO-A2.0 0675-20455670 and USNO-A2.0 0675-20702192, we used WinEfk software, developed by Dr. V. P. Goranskij.

Acknowledgements: We would like to thank S. V. Antipin for helpful discussion.

References:
Bessell, M.S., Brett, J.M., 1988, Publ. of Astron. Society of Pacific, 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


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