Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aj....140..602z&link_type=abstract
The Astronomical Journal, Volume 140, Issue 2, pp. 602-611 (2010).
Astronomy and Astrophysics
Astronomy
3
Methods: Data Analysis, Methods: Statistical, Techniques: Photometric, Telescopes
Scientific paper
The i-band observing conditions at Dome A on the Antarctic plateau have been investigated using data acquired during 2008 with the Chinese Small Telescope Array. The sky brightness, variations in atmospheric transparency, cloud cover, and the presence of aurorae are obtained from these images. The median sky brightness of moonless clear nights is 20.5 mag arcsec-2 in the SDSS i band at the south celestial pole (which includes a contribution of about 0.06 mag from diffuse Galactic light). The median over all Moon phases in the Antarctic winter is about 19.8 mag arcsec-2. There were no thick clouds in 2008. We model contributions of the Sun and the Moon to the sky background to obtain the relationship between the sky brightness and transparency. Aurorae are identified by comparing the observed sky brightness to the sky brightness expected from this model. About 2% of the images are affected by relatively strong aurorae.
Ashley Michael C. B.
Cui Xiangqun
Feng Longlong
Gong Xuefei
Hu Jingyao
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