[Comm2011] commissioning log day 5

[John P. McFarland]

Dear All,

Today, the filtering was removed on one quadrant of the mosaic and the gaps 
left by the shims were taped closed.  The twilight flat template is still 
being refined and we are striving to get a more complete set of twilight 
flats.  This night, we took extensive photometric observations and deep 
observations of two fields.  The illumination correction measurement is 
still in process from the previous photometric observations.

The highlight of the evening was the derivation of PSF anisotropy plots 
confirming the removal of the tilt from the detector plane (attached).  The 
set of 4 PDFs shows that the anisotropy in the PSF for 4 rotator positions 
is relatively constant, indicating no residual tilt!

Cheers,


-=John
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