OSU/RC Queue Observing UTC 2011 Sept 22
(civil date 2011 Sept 21/22)
=======================================

Observers: R. Pogge, R. Stoll, S. Chung (OSU)
Observing Assistant: David Gonzalez-Huerta
Support Astronomer : Dave Thompson
Instrumentation    : 

Instrument: LBC

Summary:

MODS1 guiding still inoperative, working with LBC tonight, a combination of
final instrument checkout and OSURC observing blocks as we can.

Night started with heavy clouds, some verga in the distance, but satellite
promises clearing late - Monsoons are back for a last farewell...


Details: 

06:00 - Taking Biases and Darks, since skies are still murky with cloud, a few breaks overhead
        but still not ready to open up


07:00 - Clearing enough to open up, still clouds around.  Problems opening the doors, however...

07:40 - Finally open, Checking pointing and collimation

....  - OSU_monitor N672.  
            Observed during transit; insufficiently precise copointing, so 
            one blue image shows differential field rotation, since this is 
            a very high elevation field.  Dave Thompson suggests this can be 
            ameliorated with minimal overhead (time to take one non-extrafocal 
            image) by revising the focus fields to center on a source with 
            known coordinates so that lbcrangebal can be run near the 
            position of the science field.  1" seeing.  

09:41 - OSU_monitor N628 focus and collimation field.  Converged ok.

09:51 - OSU_monitor N628 science field 
            Seeing 1.1" in r, 0.7" in u
            end of OB collimation has degraded to 1.2" in r.

10:30 - UVa_A and6_4
            collimating on field.  
10:38 - Begin OB.
          Seeing 1.0" in r, 0.8" in u
10:52 - Band of cirrus beginning to roll through, being illuminated by moon.
          Seeing 0.8" in r and g.

11:11 - OSU_monitor N925 focus field
11:34 - OSU_monitor science field.  (Astronomical twilight has just begun.)
11:49 - Clouds thicker, and getting bright.  David decided the telescope 
        needs to be closed, so we stopped OB early.