Date: 2016 June 13 UT
Observers: P. Garnavich,  M. Fausnaugh, J. Zinn
TO:  Geno B.
SA:  Barry R.

Moon phase: 1st quarter + 1 day

Summary: Patchy clouds at sunset that quickly cleared up.  Couldn't
open left shutter, delayed observations until 2 hours after sunset.
Skies were clear all night, moderate seeing near 1.0 arcseconds but
highly variable.

We also investigated an issue in MODS1 red channel while the shutter
was closed (counts are ~0.5 that of MODS2 red channel)--no solutions
as of yet.

Completed Programs (Binocular MODS): OSU_ASASSN/Brutus7545,
UM_Novae/v1974cyg, ND_nher91, ND_nher91_velocity standard (twilight)


Details (All times UT):
----------------------------------
Plan is Binocular MODS all night.

1:15 -- Woke up MODS

2:15 -- Opening up.  Conditions are mostly clear, clouds along
     	horizon.  Left shutter stuck, delaying opening. Also tried to
     	discern cause for the difference in counts between MODS1r and
     	MODS2r, with MODS2r having a factor of two fewer counts
     	compared to MODS2r. This issue does not seem to be present in
     	the sieve images, and neither do the sieve images exhibit
     	evidence of beam blockage. Rick Pogge investigated (via skype)
     	by taking sieve and biases.

4:20 -- Acquiring BRUTUS7545 TDE candidate.

4:44 -- Not all the light was getting in MODS1 finding the bright star. Homing the
     	 AGw seems to have fixed the problem. 

5:38 -- Observing BRUTUS7545. Seeing 0.9". Bright source appears 2" from center. Taking
     	one 15min of the core and two 10min exposure of the offset source.

6:40 -- Acquiring UM_Novae/v1974cyg. Ambiguity with double star on
     	target (which is not resolved in finder).  Centering on left
     	star in mods1r.20160613.0017 (x = 442, y =642 ) and
     	mods2r.20160613.0013 (x = 460, y = 629)
6:57 -- Observing v1974cyg, seeing ~ 1.2 arcseconds

8:05 -- Acquiring BD332642 (standard star)
8:14 -- Observing BD332642, seeing 1.0 arcseconds

8:29 -- Acquiring ND_nher91
8:44 -- Observing ND_nher91, seeing 1.0 arcseconds
10:00-- Seeing is highly variable, raising average to 1.3 arcseconds
10:30-- 18 degree twilight

10:52-- Acquiring nher91_velocity standard
11:08-- 12 degree twilight
11:14-- Observing nher91_velocity standard

11:32-- Closing