Date: Wed, 30 Apr 2003 22:48:12 -0600 (MDT)
From: Craig Loomis
Subject: RE: 2.5m obslog 20030429 (MJD 52759) - IRSC anomaly
  The raw frames suggest that the camera is doing something on purpose.
http://hoggpt.apo.nmsu.edu/irsc/glitch has a few frames, but little else. Go
to observer@hoggpt:irsc/data/$MJD/ if you want to look further...
 - craig
On Wed, 30 Apr 2003, Pete Newman wrote:
> > There was a weird ``spike'' in the cloud camera around 0700.  It is
> > uncertain whether or not this was a real sky event.  Maybe there is
> > an electronics problem or a problem with the chopper wheel.  Perhaps
> > someone should have a look?
>
> The first strange frame seems to be
>
>   http://hoggpt.apo.nmsu.edu/irsc/tonight/cP065800.gif
>
> where the sky level jumps up, apparently uniformly across the whole image
> (though given the flat-fielding applied, it's hard to judge from the GIF
> alone if the image of the tripod is real or put there by the flatting).  The
> next image,
>
>   http://hoggpt.apo.nmsu.edu/irsc/tonight/cP065830.gif
>
> show what looks like pixel structure in the CCD.  Then subsequent images
> seem to return to normal.  Looks to my untrained eye like a funny in the
> camera to me, not anything in the sky.
>
> The movie for last night hasn't been processed yet, should be there by ~11am
> MDT.
>
> --Pete
>
>
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