Re: Bad pixel determination with better software

[Tom Droege <tdroege@veriomail.com>]

To which I say, Amen.

Because of the very large (in sky area) pixels, we are working away from 
where most telescopes operate.  Beware of following folklore.  The "rules" 
you might hear elsewhere may not apply to the tass cameras.  In most cases 
(Arne may be an exception) the sky brightness will dominate the noise from 
other sources.

Meanwhile, I have found an error in the PROM code.  It does not make sense 
as a source for the problems, but it is an error none the less.  An array 
dimensioning error.  Possibly anything can thus happen.

Tom Droege

At 08:45 AM 12/8/00 -0700, you wrote:
>One should note that just because a pixel has a high
>dark current does not normally mean that it is "bad".
>Classically, "bad" means that the pixel either does
>not respond to light, or that it cannot be calibrated
>from a normal exposure.  Don't get too bogged down
>with dark current.  It is fun to look at, and gives
>you some interesting chemistry experiments, but
>usually is unimportant for the kinds of exposures
>and temperatures that the Mark IV sees.
>Arne