Re: New data

[Stupendous Man <richmond@a188-l009.rit.edu>]

  Michael Sallman wrote:

> I just received the sample of the new data from Tom.
> 
> There appears to be a problem with images that include the pole.
> I noticed in the *.list files that there were many images taken with
> declination of +88. All (almost all, see below) of them had zeropoints
> and color terms of 99.000.
> In Mjra2761909.list, Mjra2762576.list and Mjra2764697.list there are
> multiple images with declination of +92. They also had zeropoints and
> color terms of 99.000 and most had negative sky values and/or skysig
> value greater than sky value.

  Tom and I have been discussing this issue via E-mail.  I have not
yet had a chance to run these high-Dec images through the pipeline
myself and watch each step of the procedure.  It does not surprise
me that the astrometry routines fail this close to the pole.

  I suggest strongly that any images which are centered closer than,
say, 5 degrees from the pole be set aside for the present time.
I suggest that they NOT be placed into Michael S.'s database.
In my opinion, a database with completely reliable data is much
more useful than one with even a little bogus data.

  Other opinions?
 
                                    Michael Richmond