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Issue A&A Volume 395, Number 3, December I 2002 Page(s) 1077 - 1122 Section Instruments, observational techniques and data processing DOI 10.1051/0004-6361:20021327

A&A 395, 1077-1122 (2002)
DOI: 10.1051/0004-6361:20021327

Representations of celestial coordinates in FITS

M. R. Calabretta¹ and E. W. Greisen<sup>2

1</sup>  Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia
²  National Radio Astronomy Observatory, PO Box O, Socorro, NM 87801-0387, USA

(Received 24 July 2002 / Accepted 9 September 2002)

Abstract
In Paper I, Greisen & Calabretta (2002) describe a generalized method for assigning physical coordinates to FITS image pixels. This paper implements this method for all spherical map projections likely to be of interest in astronomy. The new methods encompass existing informal FITS spherical coordinate conventions and translations from them are described. Detailed examples of header interpretation and construction are given.

Key words: methods: data analysis -- techniques: image processing -- astronomical data bases: miscellaneous -- astrometry

Offprint request: M. Calabretta, mcalabre@atnf.csiro.au

© ESO 2002

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