IHW_IRIMAG
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 o Images 1-3 should have units of milliJanksys

 o Calibration FITS headers did not have real observation times.  Make 
   sure spurious times did not make it into the labels.

 o Separate calibration files from data files, and uncalibrated data 
   from calibrated.

 o Caveats:
    - Some files are not in flux units and are presumably not calibrated.