THE FLAT SKY - CALIBRATION AND BACKGROUND UNIFORMITY IN WIDE-FIELD ASTRONOMICAL IMAGES

Authors
CHROMEY FR HASSELBACHER DA
Citation
Fr. Chromey et Da. Hasselbacher, THE FLAT SKY - CALIBRATION AND BACKGROUND UNIFORMITY IN WIDE-FIELD ASTRONOMICAL IMAGES, Publications of the Astronomical Society of the Pacific, 108(728), 1996, pp. 944-949
Citations number
8
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of the Pacific
ISSN journal
00046280 → ACNP
Volume
108
Issue
728
Year of publication
1996
Pages
944 - 949
Database
ISI
SICI code
0004-6280(1996)108:728<944:TFS-CA>2.0.ZU;2-O
Abstract
Gradients in the surface brightness of the twilight and night sky requ ire careful consideration both in the flat-field calibration and in th e subsequent reduction of images that cover a large angular field. We present observations of BVRI surface brightness gradients in the twili ght sky, and discuss some strategies for the treatment of gradients in the moonlit and dark sky.