RE: Focus indication

["Creager, Robert S" <CreagRS@LOUISVILLE.STORTEK.COM>]

For determining FWHM relative to a nights work, would you even need
calibration frames?  I don't know about any of the real reduction pipelines,
but I was thinking of just taking a central box, putting that data into it's
own FITS file, and then running a reduction on that subset.  This will be
substantially quicker than full frame, plus, since the final reduction is
not being run, calibration frames are not needed (I think).

> -----Original Message-----
> From: Chris Albertson [mailto:chrisalbertson90278@yahoo.com]
> Sent: Monday, August 06, 2001 11:35 PM
> Cc: tass@listserv.wwa.com
> Subject: Re: Focus indication
> 
> 
> 
> I think the way to do this is to "simply" run the full data
> reduction pipeline on each image as it is readout.  I
> don't see any reason not to unless you prefer to take your
> dark and flat calibration frames last, after the image frames.
> 
>