Re: Undersampling

[<aah@nofs.navy.mil>]

I'm pretty sure that I've mentioned on this list
that my priority was to get accurate photometry for
the UCAC stars; but perhaps it was another group.  Sorry.
However, I think it is almost a perfect marriage
between the UCAC astrometric survey and the TASS
Mark IV capabilities.  (plus, of course, the USNO connection...)
  UCAC  (USNO CCD Astrometric Catalog) uses an 8" telescope
and a 4kx4k Kodak CCD, and is doing a remarkable job
in mapping the southern sky.  They will work up to +20
Dec from Chile, and then move to a northern site to
work downwards with considerable overlap.  The current
plans are to move north early next year, so perhaps the
catalog timeframe is a little sooner than Tom suggests.
  TASS is not an astrometric survey.  Don't worry if
you only get arcsec coordinates; try to get the best
possible photometry instead.
Arne