Date: Sun, 19 Sep 2004 13:54:36 -0600
From: Dan Long
Subject: Re: 2.5m obslog 20040918 (MJD 53267)
>                        APACHE POINT OBSERVATORY SDSS 2.5M
>
>                                  OBSERVING LOG
>                           Saturday September 18, 2004
>
>                                   (MJD 53267)
>
>---=== OBSERVING TEAM ===---
>
>         Howard Brewington
>         John Barentine
>
>
.
.
.
>---=== PROBLEMS IN DETAIL ===---
>
>
>Hot Columns In Imager Biases
>----------------------------
>
>We noticed tonight in a doghouse bias run that there are persistent hot
>columns in some of the images we're not famliar with:
>
>Dewar 3, chip g'
>Dewar 2, chip g'
>Dewar 1, chip u'
>Dewar 5, chip z'
>
I checked the biases in question from last night, and they have the
same hot columns as were present as far back as April (the oldest
imager bias frames I had handy), so no worries here.
				Cheers,
				  Dan