A Look at a Cleaned Tile

["Thomas F. Droege" <droege@fastmail.fm>]

In plotting data from the tile previously posted, I noticed spurious
points common to one time of exposure.  Looking at the 28 exposures I
found 3 that often had points far from the mean.  I removed these three
exposures and the resulting plot is attached.

In previous work, removing bad frames did not improve the distribution. 
I think that this is because Michael's "c) calibration" is more
important.  By using tiles, the catalog calibration problems are reduced
and then one can see the effects of bad nights. 

Tom Droege 
-- 
  Thomas F. Droege
  droege@fastmail.fm

290+36b.png

290+36b.png