Curious Result

[Tom Droege <tdroege2@earthlink.net>]

I have attached the file "tilt.png".  This is the pipeline output 
processing 4 x 4 degree squares taken on even 4 degree boundaries.  The 
telescope is scanning on centers from -4 to +16 in declination covering -6 
to +18 degrees.  There was lots of moon and some clouds, so many of the 
squares were rejected.

You will notice a tilt in the data squares.  It is about 0.1 degree per 
box.  This means that I am off 1/40th of a radian or about 1.5 
degrees.  This is not unexpected.  Now that I have Michael's nice 
make_list.out data I can get it straightened in a couple of observing sessions.

What is curious, is that there seem to be more stars found on the right 
(Higher RA) side of the image than on the left side.

Any one have any ideas as to why??

Tom Droege

tilt.png