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"Peremennye Zvezdy", Prilozhenie, vol. 9, N 34 (2009)

The New Dwarf Nova USNO-B1.0 1144-0115322

T. Kryachko^#1, A. Samokhvalov^#2, B. Satovskiy^#1, A. Prokopovich^#3

#1. Astrotel Observatory, Karachay-Cherkessia, Russia; #2. Surgut, Russia; #3. Grodno, Belarussia

ISSN 2221–0474

Received:   13.12.2009;   accepted:   22.12.2009
(E-mail for contact: bredfild@mail.ru, sav@surgut.ru, bs25@mail.ru,doctorandrey@mail.ru)

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Star Name: USNO-B1.0 1144-0115322 Coordinates (J2000): 06 26 57.69, +24 29 07.2 Variability type: UG;   Limits, System: 15.7 - (19 (R);     Period: Epoch(max): JD

Remarks:

During observations of a field in Gemini, we discovered a new dwarf nova USNO-B1.0 1144-0115322. Our observations were carried out at the Astrotel-Caucasus observatory using the 300-mm Ritchey-Chretien telescope equipped with an Apogee Alta U9000 CCD camera without filters. A total of 26 images with 5-minute exposures were obtained on JD 2455146 - 2455158. For basic reduction for dark current, flat fields and bias, and for photometry we used MaxIm DL software. The comparison star was USNO-A2.0 1125-03980860 = USNO-B1.0 1144-0115338 (06:26:59.41 +24:28:51.7, J2000, 2MASS; R1 = 15.97, R2 = 16.04, USNO-B1.0). Unfiltered magnitudes were calibrated using the comparison star, assuming Rcomp = 16.005. The spectra obtained by Pejcha (2009) upon our preliminary announcement correspond to a dwarf nova in outburst.

References:

Pejcha, O., 2009, vsnet-alert 11678