RE: New Data Sets (really answers to Rob Creager's question)

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

  Rob asked:

> Can anyone answer the implicit question above?  Is there any functionality
> in Michael's pipeline which will take in a dark/flat adjusted fits image and
> spit out a list of stars?  One that would not depend on any other
> info/config files/etc...?

  The pipeline calls three XVista programs to turn a clean image
into a list of stars:

     - sky:     determine the sky value in the image
     - stars:   find stars in the image
     - phot:    measure instrumental magnitudes of the stars
      
  Before these lists can be compared to catalog (RA, Dec) values,
the coordinates must be converted from (row, col) in pixels
into something close to radians from the center of the field,
using a tangent-plane projection.  Then the catalog (RA, Dec)
values are _also_ converted into radians in a similar fashion ...
and then one can attempt to match them.

                                             Michael Richmond