GALEX MCAT Source Density
The density of NUV and FUV sources in detector coordinates are computed for
3267 'MCAT' merged catalogs. This includes MIS single visit (no subvisits)
The observations are widely spread out over time and over the sky. The exposure
times range from 300 to 1700 seconds. The maps shown below are smoothed with
a 5 by 5 pixel box.
The smoothed NUV source density map appears to have some azimuthal symmetry (why?), which does
not appear to closely match the response map.
The smoothed FUV source density map does not have the same 'ring' patterns as with the NUV sources, and
appears to better match the FUV response map. (Note the unmasked hot spots.)
-tab February 2009