geometric distortion

From: Alex Conley (aconley@panisse.lbl.gov)
Date: Thu Apr 10 2003 - 10:48:42 PDT

  • Next message: Robert A. Knop Jr.: "Re: geometric distortion"

    Hey, did you correct your point-source photometry for the geometric
    distortion of WFPC2? Since the SNe were close to the center, the
    correction should be pretty minimal, but if you didn't do it, it would
    probably be worth quoting limits on the effect.

    The best (or at least newest) attempt to figure out the distortion
    solution is Anderson and King : 2003PASP..115..113A, but
    you might also look at Casertano and Wiggs, HST Instrument Science
    Report WFPC2 2001-10. In fact, I probably should have tried to see
    if the transformations work now that Anderson and Kings report is out,
    but it's a little late in the game for that.

    Alex

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