PHOTOMETRY OF VARIABLE STARS FROM DOME A, ANTARCTICA: RESULTS FROM THE 2010 OBSERVING SEASON

We present results from a season of observations with the Chinese Small Telescope ARray, obtained over 183 days of the 2010 Antarctic winter. We carried out high-cadence time-series aperture photometry of 9125 stars with i [lap] 15.3 mag located in a 23 deg super(2) region centered on the south cele...

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Bibliographic Details
Published in:The Astronomical journal 2013-12, Vol.146 (6), p.1-10
Main Authors: Wang, Lingzhi, Macri, Lucas M, Wang, Lifan, Ashley, Michael C B, Cui, Xiangqun, Feng, Long-Long, Gong, Xuefei, Lawrence, Jon S, Liu, Qiang, Luong-Van, Daniel
Format: Article
Language:English
Subjects:
ANTARCTICA
Arrays
ASTRONOMY
ASTROPHYSICS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
CHINESE ORGANIZATIONS
Domes
PHOTOMETRY
Seasons
STATISTICS
TELESCOPES
VARIABLE STARS
Winter
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Summary:We present results from a season of observations with the Chinese Small Telescope ARray, obtained over 183 days of the 2010 Antarctic winter. We carried out high-cadence time-series aperture photometry of 9125 stars with i [lap] 15.3 mag located in a 23 deg super(2) region centered on the south celestial pole. We identified 188 variable stars, including 67 new objects relative to our 2008 observations, thanks to broader synoptic coverage, a deeper magnitude limit, and a larger field of view. We used the photometric data set to derive site statistics from Dome A. Based on two years of observations, we find that extinction due to clouds at this site is less than 0.1 and 0.4 mag during 45% and 75% of the dark time, respectively.
ISSN:0004-6256
1538-3881
1538-3881
DOI:10.1088/0004-6256/146/6/139