From: Greg Aldering (aldering@panisse.lbl.gov)
Date: Mon Apr 05 2004 - 20:43:29 PDT
Vitaliy and I looked at whether the zeropoint corrections just sent
by Rob bring our photometry into agreement with that of Adam. Here
is a comparison table
Zorig Zapcor Zcorr ZAdam Diff | Iorig Iapcor Icorr IAdam Diff
----------------------------------------------------------------------------
-076 24.52 0.57 25.09 25.1 0.0 | 25.96 0.59 26.55 26.8 -0.3
-177 24.61 0.81 25.42 25.2 0.2 | 25.52 0.72 26.24 26.65 -0.41
-096 24.90 0.73 25.63 25.5 0.1 |
Look at the "Diff" columns; the corrections look good in Z-band. In
I-band there is still a hint of a systematic (note the I-band magnitude
uncertainties are 0.2-0.3 mag, so this is just a hint).
- G & V
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