Re: AB i' zp uncertainty

From: Robert A. Knop Jr. (robert.a.knop@vanderbilt.edu)
Date: Tue Nov 05 2002 - 10:45:28 PST

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    On Tue, Nov 05, 2002 at 10:39:45AM -0800, Michael Wood-Vasey wrote:

    > Rob may have more opinions about this, but I think we're pretty
    > confident that we're right to within a couple tenths of a magnitude.

    That's about what I'd say-- maybe even to 0.1 mag. However, there is a
    systematic error, with all of our magnitudues probably 0.2 too dim, since
    the subtraction software doesn't do an aperture correction. (1FWHM
    radius aperture.)

    -Rob

    -- 
    --Prof. Robert Knop
      Department of Physics & Astronomy, Vanderbilt University
      robert.a.knop@vanderbilt.edu
    


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