Find HST GSC Stars in Image Region

WCSTools programs
imgsc is a link to the WCSTools imcat utility which finds all of the Hubble Space Telescope Guide Star Catalog objects in a FITS or IRAF image and lists their sky and image positions. World coordinate system (WCS) information must be present in the image header to describe, in a standard way, the relationship between sky coordinates and image pixels. This information is used by the program to find the region in the sky to search and to transform right ascension and declination sky coordinate pairs to image coordinate (X,Y) pairs. Output is sent to a file called filename.gsc and to standard output if the -v flag is set. The minimum command line is
imgsc FITS or IRAF filename
The same effect can be obtained by running
imcat -c gsc FITS or IRAF filename

Command Line Arguments


List the 10 brightest HST Guide Stars in an image
List the HST Guide Stars in an image into a file
Plot HST Guide Stars over an image using SAOimage

Last updated 30 July 2002 by Doug Mink dmink@cfa.harvard.edu

Telescope Data Center