Many deep catalogs are derived from old film-based "all sky surveys", mainly the Palomar POSS surveys. These were done on glass film plates, and there are some defects in the emulsions that get detected by automated scanning procedures. I'm not sure why these plate defects would be listed in the resulting catalog.
-John ----- Original Message ---- > From: klauslms <[EMAIL PROTECTED]> > To: [email protected] > Sent: Sunday, August 17, 2008 5:02:57 PM > Subject: [skychart-discussion] catgen-problem > > Hello group! > If I to try (re-) built some galaxy-catalogs for CDC like UGC or > ESO-LV or Eso (B)with catgen 1.3 I never get satisfying results, > because of a plate defekt. > What does that mean and what reason may it have? > Kind regards > Charlyms > > > ------------------------------------ > > Yahoo! Groups Links > > >
