Peremennye Zvezdy

"Peremennye Zvezdy",
Prilozhenie
,
vol. 12, N 21 (2012)

New Variable Stars in Aquila II

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

Received:   28.08.2012;   accepted:   13.12.2012
(E-mail for contact: bredfild@mail.ru, sav@surgut.ru, bs25@mail.ru)


#NameOtherCoord (J2000)TypeMaxMinSystemPeriodEpoch (JD)typeSpCommentL.CurveFind.ChartData
1 USNO-A2.0 0900-1723444919 57 53.35, +04 55 27.6RRAB17.0017.95*0.503112455796.263Max Comm. 101_PC-R.png01_chart.jpg01_data.txt
2 USNO-A2.0 0900-1723886519 57 57.90, +05 28 15.5EW17.1017.71*0.2872982455679.5163Min Comm. 202_PC-R.png02_chart.jpg02_data.txt
3 USNO-A2.0 0900-1724547619 58 04.49, +04 46 52.8EW15.3915.63*0.399432455676.683Min Comm. 303_PC-R.png03_chart.jpg03_data.txt
4 USNO-A2.0 0900-1724585319 58 04.87, +05 25 51.2RRAB17.5318.27*0.579862455676.971Max Comm. 404_PC-R.png04_chart.jpg04_data.txt
5 USNO-A2.0 0900-1724709319 58 06.11, +04 46 13.3EW17.6418.34*0.300602455677.118Min Comm. 505_PC-R.png05_chart.jpg05_data.txt
6 USNO-A2.0 0900-1725378719 58 12.79, +04 56 26.4BY:15.9316.16*19.42455739.3Max Comm. 606_PC-R.png06_chart.jpg06_data.txt
7 USNO-A2.0 0900-1726208519 58 21.12, +04 43 12.3EW18.7219.80*0.325962455676.678Min Comm. 707_PC-R.png07_chart.jpg07_data.txt
8 USNO-A2.0 0900-1726724519 58 26.38, +05 30 42.4SR14.70<15.90*1242455720Max Comm. 808_PC-R.png08_chart.jpg08_data.txt
9 USNO-A2.0 0900-1726737719 58 26.55, +05 01 12.1EW14.9015.04*0.291692455676.712Min Comm. 909_PC-R.png09_chart.jpg09_data.txt
10 USNO-A2.0 0900-1726827919 58 27.49, +04 46 52.9EW15.0615.23*0.472442455676.637Min Comm. 1010_PC-R.png10_chart.jpg10_data.txt
11 2MASS 19582756+045421219 58 27.56, +04 54 21.3RRAB15.6116.43*0.585812455756.4052Max Comm. 1111_PC-R.png11_chart.jpg11_data.txt
12 USNO-A2.0 0900-1727995519 58 39.49, +05 03 03.3EB14.7214.94*0.670852455677.172Min Comm. 1212_PC-R.png12_chart.jpg12_data.txt
13 USNO-A2.0 0900-1728279619 58 42.46, +05 29 12.3EW17.2417.74*0.362272455676.649Min Comm. 1313_PC-R.png13_chart.jpg13_data.txt
14 USNO-A2.0 0900-1728608319 58 45.87, +05 26 52.3EW17.8018.34*0.308982455676.784Min Comm. 1414_PC-R.png14_chart.jpg14_data.txt
15 USNO-A2.0 0900-1729238219 58 52.22, +05 02 54.1BY:14.5714.63*3.8272455679.99Max Comm. 1515_PC-R.png15_chart.jpg15_data.txt
16 USNO-A2.0 0900-1729973619 58 59.93, +05 31 37.3SR14.8215.21*29.52455734.8Max Comm. 1616_PC-R.png16_chart.jpg16_data.txt
17 USNO-A2.0 0900-1730081219 59 01.10, +05 11 48.2SR:13.5913.67*28.32455676.5Max Comm. 1717_PC-R.png17_chart.jpg17_data.txt
18 USNO-A2.0 0900-1730762419 59 08.17, +04 50 43.3EW16.6417.09*0.259822455676.624Min Comm. 1818_PC-R.png18_chart.jpg18_data.txt
19 USNO-A2.0 0900-1731559919 59 16.34, +05 29 25.8EB14.61:15.05*0.545632455677.049Min Comm. 1919_PC-R.png19_chart.jpg19_data.txt
20 USNO-A2.0 0900-1732958419 59 30.93, +05 31 55.7LB14.9715.62*  other Comm. 2020_PC-R.png20_chart.jpg20_data.txt
21 USNO-A2.0 0900-1734547519 59 47.54, +04 58 48.3EW17.3418.00*0.272812455676.508Min Comm. 2121_PC-R.png21_chart.jpg21_data.txt
22 USNO-A2.0 0900-1734738319 59 49.56, +04 42 34.4BY:15.9116.10*19.22455688.2Max Comm. 2222_PC-R.png22_chart.jpg22_data.txt
23 USNO-A2.0 0900-1735809920 00 01.38, +04 56 14.6EW16.8717.58*0.275582455677.5226Min Comm. 2323_PC-R.png23_chart.jpg23_data.txt
24 USNO-A2.0 0900-1736257620 00 06.22, +04 51 01.3EW15.8716.30*0.410472455676.547Min Comm. 2424_PC-R.png24_chart.jpg24_data.txt
25 USNO-A2.0 0900-1736387420 00 07.67, +05 10 49.7EW18.3619.02*0.348822455676.714Min Comm. 2525_PC-R.png25_chart.jpg25_data.txt
26 USNO-A2.0 0900-1737044220 00 14.69, +05 17 22.6HADS16.8717.19*0.0626142455676.5387Max Comm. 2626_PC-R.png26_chart.jpg26_data.txt
27 USNO-A2.0 0900-1737613220 00 20.90, +05 30 11.3EW16.9617.20*0.263112455676.809Min Comm. 2727_PC-R.png27_chart.jpg27_data.txt
28 2MASS 20002353+050517420 00 23.53, +05 05 17.4RRC15.6315.96*0.353152455676.839Max Comm. 2828_PC-R.png28_chart.jpg28_data.txt
29 USNO-A2.0 0900-1738613920 00 31.49, +05 00 36.4BY+E:13.9314.03*25.42455696.3Max Comm. 2929_PC-R.png29_chart.jpg29_data.txt
30 USNO-A2.0 0900-1741095020 00 57.80, +05 05 59.0EW16.4817.31*0.348642455679.882Min Comm. 3030_PC-R.png30_chart.jpg30_data.txt
31 USNO-A2.0 0900-1741143720 00 58.32, +04 43 37.2RRAB15.7116.71*0.522992455832.671Max Comm. 3131_PC-R.png31_chart.jpg31_data.txt
32 USNO-A2.0 0900-1741153820 00 58.42, +05 18 32.3SR13.0213.33*60.32455704.3Max Comm. 3232_PC-R.png32_chart.jpg32_data.txt
33 USNO-A2.0 0900-1742472120 01 12.92, +05 19 09.7HADS16.9317.66*0.0984322455722.589Max Comm. 3333_PC-R.png33_chart.jpg33_data.txt
34 USNO-A2.0 0900-1742816620 01 16.64, +05 00 12.2EB15.7115.95*1.05322455677.505Min Comm. 3434_PC-R.png34_chart.jpg34_data.txt
35 USNO-A2.0 0900-1742826220 01 16.78, +04 41 43.3SR:16.7819.27*39.82455737.1Max Comm. 3535_PC-R.png35_chart.jpg35_data.txt

Comments:


1. Maximum: HJD(TT) 2455796.263 ± 0.001.

2. A close pair of USNO-A2.0-0900-17238865 and a faint star, not present in any of major catalogues. USNO-A2.0-0900-17238865 varies. Primary minimum: HJD(TT) 2455679.5163 ± 0.0003. MinII = 17m.63.

3. A close pair of two stars, not present separately in any major catalogues. Type RRC with period 0d.24967 or type EW with periods 0d.66579 or 0d.49934 are not excluded. MinII = 15m.62.

4. Possible Blazhko effect.

5. MinII = 18m.25.

6. Infrared colors J–H = 0.654, H–K = 0.132, J–K = 0.786 (2MASS) are consistent with the K spectral type (Bessell and Brett 1988) and BY: classification.

7. MinII = 19m.7.

8. Infrared colors J–H = 0.986, H–K = 0.345, J–K = 1.331 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and SR classification. Maximum: HJD(TT) 2455720.

9. A close triplet of stars: 2MASS 19582642+0501114, 2MASS 19582645+0501154 and 2MASS 19582662+0501104. The angular resolution of our telescope is insufficient to determine which star varies. MinII = 15m.02.

10. MinII = 15m.23.

11. Maximum: HJD(TT) 2455756.4052 ± 0.0001.

12. A close pair of two stars, not present separately in any major catalogues. MinII = 14m.90.

13. MinII = 17m.70.

14. MinII = 18m.24.

15. Infrared colors J–H = 0.564, H–K = 0.141, J–K = 0.705 (2MASS) are consistent with the K spectral type (Bessell and Brett 1988) and BY: classification.

16. Infrared colors J–H = 0.707, H–K = 0.168, J–K = 0.875 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and SR classification. Maximum: HJD(TT) 2455734.8 ± 0.2.

17. Infrared colors J–H = 0.893, H–K = 0.263, J–K = 1.156 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and SR: classification. Type LB is also possible.

18. MinII = 16m.99.

19. MinII = 15m.00.

20. Infrared colors J–H = 0.864, H–K = 0.282, J–K = 1.146 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and LB classification.

21. O'Connell effect. MinII = 17m.94.

22. Infrared colors J–H = 0.539, H–K = 0.119, J–K = 0.658 (2MASS) are consistent with the K spectral type (Bessell and Brett 1988) and BY: classification.

23. Primary minimum: HJD(TT) 2455677.5226 ± 0.0008. MinII = 17m.58.

24. O'Connell effect. MinII = 16m.28.

25. MinII = 18m.93.

26. The one-day alias period 0d.058916 is also possible. Maximum: HJD(TT) 2455676.5387 ± 0.0008.

27. Period 0d.30306 is also possible. MinII = 17m.20.

28. A close pair of 2MASS 20002353+0505174 and 2MASS 20002364+0505211. 2MASS 20002353+0505174 varies.

29. Infrared colors J–H = 0.596, H–K = 0.129, J–K = 0.725 (2MASS) are consistent with the K spectral type (Bessell and Brett 1988) and BY: classification. At the phase 0.91, we detect an eclipse-like minimum.

30. Period 0d.42243 is also possible. MinII = 17m.10.

31. Blazhko effect.

32. Infrared colors J–H = 0.949, H–K = 0.404, J–K = 1.353 (2MASS) are consistent with the M spectral type (Bessell and Brett 1988) and SR classification.

33. The one-day alias period 0d.109205 is also possible.

34. MinII = 15m.79.

35. Maximum: HJD(TT) 2455737.1.

Remarks:
During observations of a field in Aquila, we discovered 35 new variable stars. Our observations were carried out at the Astrotel-Caucasus observatory, located at the Astronomical station of the Kazan Federal university (Northern Caucasus), using the 300-mm Ritchey-Chretien telescope, equipped with an unfiltered Apogee Alta U9000 CCD camera. A total of 203 images with 5-minute exposures were obtained on JD 2455676–2455832. For basic reductions for dark current, flat fields and bias, we used IRAF routines. To search for of new variable stars and perform their photometry, we applied VaST software by Sokolovsky and Lebedev (2005). The comparison star was USNO-A2.0 0900-17301510 = USNO-B1.0 0948-0507157 (α = 19h59m01s.81, δ = +04°48′ 20″.5 (J2000, 2MASS)), R1 = 14m.30, R2 = 14m.60 (USNO-B1.0). Unfiltered magnitudes were calibrated using the comparison star, assuming Rcomp = 14m.45. The coordinates of the variable stars in the table were drawn from the 2MASS catalogue (Skrutskie et al. 2006) except for stars: USNO-A2.0 0900-17262085, USNO-A2.0 0900-17267377, and USNO-A2.0 0900-17363874; their coordinates were drawn from the USNO-A2.0 catalogue (Monet et al. 1998). We searched for periods and epochs of extrema using Peranso software.

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

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