2017-02-25
==========

CDK20N
Moore Observatory

John Kielkopf


Sloan g' r' i' z' filter set



Caldwell 40
-----------

Files c40_g.fits, c40_r.fits, and c40_i.fits are sums of exposures of 100
seconds each.  The files were coadded with swarp and the file sizes are not all
the same as a consequence. 

The color image uses 

i -> red
r -> green
g -> blue

and is on a linear scale stretched to show the galaxy well. Gaussian smoothing
has been applied using a 1.5 pixel radius function to reduce background noise. 
The image has been processed to remove hot pixel artifacts as well.  It s not on
the original pixel scale of the fits science images.