Date: Fri, 17 Jan 2003 14:45:20 -0500 (EST)
From: David Schlegel
Subject: Re: Spectro dark currents [was 2.5m obslog 20030115 (MJD 52655)]
Pete-
You can regenerate any of the bias computations from
the raw sdR files.  It would be useful to review the
history on this.  The bias levels must have been lower
in the past for us to set the limits so low.  If you
don't yet have a copy of all the raw data spinning,
you should definitely get it.
Please keep the discussion clear on whether we're talking
about bias levels or dark current (typically in 15 min exposures).
We *always* speak in terms of electrons (not ADU) for
the spectrographs.  The lowest-level routines convert
to electrons as a first step (more or less).
-David