14

SUN/5.18

Starlink Project
Starlink User Note 5.18

P. T. Wallace, Norman Gray

2nd May 2003

ASTROM
Basic astrometry program

v3.7

User’s Guide


Abstract

ASTROM performs “plate reductions”. You supply star positions from a catalogue and the [x, y] ccoordinates of the corresponding star images. ASTROM uses this information to establish the relationship between [x, y] and [α, δ] enabling the coordinates of “unknown stars” to be determined.

Contents

1 Introduction
2 Operating Instructions
3 The Input File
4 Output
 4.1 Log output
 4.2 FITS WCS output
5 Method
6 Limitations
7 Reduction in Observed Place
8 Fitting Plate Centre and Radial Distortion
9 Parallax
A The Input File
B Example Report
C Effective Wavelengths
D Error and Warning Messages

References

[1]   E. W. Greisen and M. R. Calabretta. Representations of world coordinates in FITS. Astronomy and Astrophysics, 395(3):1061–1076, December 2002. ‘Paper I’, also available at [3].

[2]   M. R. Calabretta and E. W. Greisen. Representations of celestial coordinates in FITS. Astronomy and Astrophysics, 395(3):1077–1122, December 2002. ‘Paper II’, also available at [3].

[3]   M. R. Calabretta et al. FITS WCS pages. Web page [cited May 2003]. http://www.atnf.csiro.au/people/mcalabre/WCS/.