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46.7 Photometry

The photometry keywords (PHOTFLAM, PHOTZPT, PHOTPLAM, PHOTBS, and PHOTMODE) in the .c0h header are populated by the calwfp task; the header keywords are updated but the data are not changed (see "Converting Counts to Flux or Magnitude" on page 3-15). There are four effects that to be aware of when converting from DN to flux:



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1 For more information about photometric modeling, see WF/PC-1 ISR 93-02.

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