For remembering how to make thumbnail images from .fits files
This is mainly to remember how to call ds9 with the appropriate parameters to get a 3x3 arcsec image. The script assumes that it is called as ./ds9thumb.sh thumbname RA DEC with thumbname being the name of the output file, RA and DEC in degrees, fk5. File is output as png.
Further command line options is available at http://ds9.si.edu/doc/ref/command.html.