Photometry of Variable Stars from Dome A, Antarctica: Results from the 2010 Observing Season

Abstract

We present results from a season of observations with the Chinese Small Telescope ARray (CSTAR), obtained over 183 days of the 2010 Antarctic winter. We carried out high-cadence time-series aperture photometry of 20,000 stars with i<15.3 mag located in a 23 square-degree 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.

Accepted for publication in the Astronomical Journal. Light curves and finding charts of all variable stars will be made available at http://casdc.china-vo.org/data/cstar

References in corpus (7)

• Supernova 2011fe from an Exploding Carbon-Oxygen White Dwarf Star
• Deep MMT Transit Survey of the Open Cluster M37 II: Variable Stars
• RR Lyrae Stars, Metal-Poor Stars, and the Galaxy
• Calibrated griz magnitudes of Tycho stars: All-sky photometric calibration using bright stars
• Atmospheric scintillation at Dome C, Antarctica: implications for photometry and astrometry
• Photometry of Variable Stars from Dome A, Antarctica
• Fringe Science: Defringing CCD Images with Neon Lamp Flat Fields

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