public static void main(java.lang.String args)
Usage: java skyview.util.PixelCoords file x y
where file is the name of the FITS file and
x and y are the pixel coordinates for
which the celestial J2000 coordinates are desired.
Note that the pixel coordinates for an NxM image
run from 0 to N and 0 to M. The standard definition
used within FITS for coordinates (e.g., in the CRPIX
values) would range from 1/2 to N+1/2 and 1/2 to M+1/2.