Observers: Kevin Croxall, Jpnathon Brown
Support Astronomer: Michelle Edwards
Telescope Operator: David G.H.


Summary

Full night with MODS1. Cloudy start that then cleared.  However, the clouds
returned causing issues keeping even bright guide stars.

Feige 34
OSU_ASASSIN14ae
OSU_SDSS1029 - only 4/8 images.  Variable cirrus during those 4 exposures.


Details: All times are UTC unless otherwise indicated

MODS1 Calibrations

01:50 - Started instrument calibs
        grpixflats - dual, blue
           MODS hung in the middle of the blue exposure

03:00 - sky has cleared some.  opening up
        fast moving cirrus

03:22 - difficulty getting wavefronts on 12mag star

03:37 - acq Feige 34 seeing ~1.4"
        wavefront sensing off
	still very marginal clouds

04:10 - aquiring OSU_ASASSIN14ae
04:13 - re-collimating
04:20 - re-aquiring OSU_ASASSIN14ae
04:35 - start obs (removed 'q' from the script header)
        seeing ~1.1"
        variable clouds
        red imcs had trouble locking

05:04 - acquire OSU_CHAOS:NGC3627_F1
        quide star too faint for the cirrus
05:11 - aquire OSU_SDSS1029
	good seeing but cirrus coming and going
        seeing ~0.99
05:27 - start obs script
06:27 - guide star generally strong, but occasionally
        vanishes for a few seconds.
06:52 - seeing ~1.0"
        thicker clouds on image 5...
        had to stop exposure due to thicker clouds

08:15 - chiller alarm.
08:23 - acquire OSU_ASASSIN13dn
08:42 - need to re-collimate and re-aquire
        seeing ~1.7-2.1"
        guide star resembles a space-peanut.
        can't hold a 13th mag guide.

08:59 - trying VGS36a with a 12th mag guide.
	nothing visible.  Clouds quite thick.
	got 1 image of VGS36A with varying cloud cover...
	mods_quickreduce reveals....
	

10:22 - closing due to clouds
        grpixflats - red
        grlamps - dual, red, blue
        imflat_r - red SDSS r for acq image flats
        bias3K.cal  - takes 5 3Kx3K unbinned "imaging" bias images in both channels
        bias8K.cal  - takes 5 full-frame, unbinned bias images in both channels
        SDSS1029_grmosflats.cal
        SDSS1029_grmoslamps.cal