ACS noise(/depth?) variations - addendum

From: Greg Aldering (aldering@panisse.lbl.gov)
Date: Sun Apr 04 2004 - 14:53:31 PDT

  • Next message: Saul Perlmutter: "We should *first* go through good candidates WITH hosts (much higher priority)."

    In the previous email I neglected to give the spread in the loci - Y
    has a range of 0.7 mag in the new search, but only 0.3 mag in the 2003
    search. That is objects at the same magnitude in the new search have a
    variation in S/N of about a factor of 2. So, the reason this
    observation may matter is that it suggests a rather large variation in
    depth amongst the various images in the new search.

    This should be straightforward to check, and of course Rob may have a
    quick explaination.

    - Greg

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