From: Robert A. Knop Jr. (robert.a.knop@vanderbilt.edu)
Date: Sun Apr 04 2004 - 16:07:04 PDT
On Sun, Apr 04, 2004 at 04:04:37PM -0700, Greg Aldering wrote:
> Let me also remind people that Adam has an HST ISR which discusses the
> number of photoelectrons deposited by CRs. There is a minimum
> deposition, from which we once calculate that any CR will deposit
> enough e- such that it will be as bright or brighter than a SN Ia at
> z ~ 1.2 at maximum. This might prove useful in judging some tough cases.
As an aside to this -- this minimum deposition should *not* be
considered on the images in the subtraction, *only* in the individual
images. Sometimes what happens with coincidences of cosmic rays is that
a small residual is left behind (most of it gets cleaned, but a little
tail is left behind). That's what shows up as a dim candidate.
-Rob
-- --Prof. Robert Knop Department of Physics & Astronomy, Vanderbilt University robert.a.knop@vanderbilt.edu
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