The Flat Sky: Calibration and Background Uniformity in Wide Field Astronomical Images

Details The Flat Sky: Calibration and Background Uniformity in Wide Field Astronomical Images The Flat Sky: Calibration and Background Uniformity in Wide Field Astronomical Images

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996pasp..108..944c&link_type=abstract

Publications of the Astronomical Society of the Pacific, v.108, p.944

Astronomy and Astrophysics

Astronomy

24

Techniques: Photometric

Scientific paper

Gradients in the surface brightness of the twilight and night sky require careful consideration both in the flat-field calibration and in the subsequent reduction of images that cover a large angular field. We present observations of BVRI surface brightness gradients in the twilight sky, and discuss some strategies for the treatment of gradients in the moonlit and dark sky. (SECTION: Atmospheric Phenomena and Seeing)

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