Extinction prior bias

From: Greg Aldering (aldering@panisse.lbl.gov)
Date: Thu May 22 2003 - 16:36:14 PDT

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    Hi Rob,

    With the current fits, can you tell us how much of a bias was
    introduced by using the Riess prior? You say in the figure
    caption that a bias is apparent, so you must know what it is.

    Note that I am finding that our low-extinction technique also
    has a bias, ranging from 0.02 to 0.04 mag between high and low
    redshifts. Adding the cut on color error actually helps, leading
    to the lower bias, because now extincted SNe can't sneak in
    as easily. This all has to be checked, which is why I haven't
    mentioned it earlier.

    Other than this, and the items from earlier today which you have
    now fixed, I don't see other problems.

    - Greg

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