Peremennye Zvezdy

"Peremennye Zvezdy",
Prilozhenie
,
vol. 10, N 25 (2010)

New Variable Stars in Aquila

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

Received:   3.09.2010;   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 0900-1856696420 29 12.66, +00 30 28.3EW15.8616.53 0.28142455391.4159Min Comm. 101_PC-R.png01_chart.jpg01_data.txt
2 USNO-A2.0 0900-1857831620 29 34.87, +00 05 26.3RRAB16.2117.23 0.53652455387.4028Max Comm. 202_PC-R.png02_chart.jpg02_data.txt
3 USNO-A2.0 0825-1835590220 29 49.40, -00 06 00.2EW16.4017.04 0.25832455391.4152Min Comm. 303_PC-R.png03_chart.jpg03_data.txt
4 USNO-A2.0 0900-1862029520 30 59.43, +00 22 26.2EW16.0516.64 0.34022455397.3972Min Comm. 404_PC-R.png04_chart.jpg04_data.txt
5 USNO-A2.0 0900-1862562620 31 10.35, +00 01 40.5EW15.3015.45 0.28842455384.4902Min Comm. 505_PC-R.png05_chart.jpg05_data.txt
6 USNO-A2.0 0825-1839060120 31 20.88, -00 11 25.3RRAB14.5715.58 0.60532455397.3961Max Comm. 606_PC-R.png06_chart.jpg06_data.txt

Comments:


1. Primary minimum: HJD(TT) 2455391.4159±0.0004. MinII=16m.40.

2. Maximum: HJD(TT) 2455387.4028±0.0005.

3. Primary minimum: HJD(TT) 2455391.4152±0.0009. MinII=16m.99.

4. Primary minimum: HJD(TT) 2455397.3972±0.0005. Period 0.4102 d is also possible.

5. MinII=15m.41.

6. Maximum: HJD(TT) 2455397.3961±0.0006.

Remarks:
During observations of the field in Aquila, we discovered six 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 106 images with 5-minute exposures were obtained on JD 2455382 - 2455397. 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 0900-18617527 = USNO-B1.0 0904-0528702 (α=20h30m53s.81, δ=+00°25′ 33″.7 J2000, 2MASS); R1=14m.24, R2=14m.44 (USNO-B1.0). Unfiltered magnitudes were calibrated using the comparison star, assuming Rcomp=14m.34. 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).

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

References:
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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