ASTDISP

       Print astronomical and pixel coordinates in a standard format

       This procedure (ASTrometry DISPlay) prints the astronomical and
       pixel coordinates in a standard format.  X,Y must be supplied.  RA,DEC
       may also be supplied, and a data number (DN) may also be
       supplied.   With use of the Coords= keyword, a string containing the
       formatted data can be returned in addition or instead (with /silent)
       of printing.

       ASTDISP, x, y, [Ra, Dec, DN, COORD = , /SILENT ]

       X  - The X pixel coordinate(s), scalar or vector
       Y  - The Y pixel coordinate(s), scalar or vector

       RA -  Right Ascention in *degrees*, scalar or vector
       DEC - DEClination in *degrees*, scalar or vector (if RA is supplied, DEC must also be supplied)
       DN -  Data Number or Flux values
       Each of the inputs X,Y, RA, DEC, DN should have the same number of
               elements

       SILENT    Prevents printing.  Only useful when used with Coords=

       Printed positions in both degrees and sexigesimal format
       All passed variables remain unchanged

       COORDS    Returns the formatted coordinates in a string

       ADSTRING - used to format the RA and Dec

       10-AUG-90 Version 1 written by Eric W. Deutsch
       20-AUG-91 Converted to standard header.  Vectorized Code.  E. Deutsch
       20-NOV-92 Added Coords= and /silent.  E.Deutsch
       Converted to IDL V5.0   W. Landsman   September 1997

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