NAME:
  darkadj
 PURPOSE:
  Adjust a superdark CCD calibration frame by a multiplicative constant.
 DESCRIPTION:

  This is a kludge routine that is needed for one of my CCD cameras.  It
    _always_ generates a superdark frame that is too hot when used for
    correcting normal stare-mode images.

 CATEGORY:
  CCD data processing
 CALLING SEQUENCE:
  darkadj,indark,factor
 INPUTS:
  indark - String containing file name of dark image (FITS format) to adjust
  factor - Multiplicative factor for adjustment
               newdark = factor * indark
 OPTIONAL INPUT PARAMETERS:

 KEYWORD INPUT PARAMETERS:

 OUTPUTS:
  The adjusted dark frame is written to the file, indark+'a'
 KEYWORD OUTPUT PARAMETERS:

 COMMON BLOCKS:

 SIDE EFFECTS:

 RESTRICTIONS:

 PROCEDURE:

 MODIFICATION HISTORY:
  Written by Marc W. Buie, Lowell Observatory, 1999 May 12