OSU/RC Queue Observing UTC 2011 Sept 24
(civil date 2011 Sept 23/24)
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Observers: R. Pogge, R. Stoll, S. Chung (OSU), D. Berg (UM)
Observing Assistant: David Gonzalez-Huerta
Support Astronomer : Dave Thompson
Instrumentation    : 

Instrument: LBC

Summary:

This is a "technical night".  Support astronomer spent first part of the evening pointing at different elevations with the aim of improving the collimation model of LBC.  At approximately 07:00 (UT), we started science OBs and will continue science OBs until the new collimation model is ready to be tested.  

Details: 

07:00 -- Co-pointing and collimation on OSU_monitor N6946 OB.  Seeing estimate is ~0.6 in red.

07:07 -- Note that N6946 OB has been edited to exclude U-band, and only observe on B and V in the blue channel, for 900 sec per filter (total time = 1800 sec).  

      A little bit of trailing in the first set of images (blue and red). 

      Second set of images are rotated relative to the first set by ~7 deg.  The first set was observed with a position angle of 353 deg, while the second set showed position angle of 360 deg.  Trailing is gone in the second set of images, stars look round. 

      Last red image -- completely unfocused!  The mirror panicked.


08:?? -- Co-pointing and collimation on UVa And22

08:15 -- UVa And22c OB 

      Trailing of stars on images 
      Guide star on red looks very out of focus

09:02 -- Co-pointing and collimation on ND SN09IG

09:15 -- ND SN09IG_1 OB

	    
Remainder of night spent testing the new collimation model.