Date: 2017 May 24 UT
Observers: Jon Brown, Patrick Vallely
TO:  Steve A.
SA:  Dave T. (on call)

Moon phase:

Summary: Plan is to start with LUCI2 for the OSU_KELT transit, which 
         begins at the end of twilight.

Completed Programs: OSU_KELT/TrES3
                    OSU_ASASSN/AT2017eaw






Calibrations:

Details (All times UT):
----------------------------------

01:50 -- LUCI2 darks for OSU_KELT/TrES3.
         Skies are looking pretty clear, but there are a few dense
         clouds here and there, maybe more moving in from West.

03:30 -- Observing window starts shortly after the object moves
         within elevation limits. We're collimating nearby.
         Dave copied the LMS file over from the LUCI computer (it was
         not in the OBs directory).

04:15 -- Started OSU_KELT/TrES3 eclipse observations. The alignment stars 
         looked well centered. The target and comp were shifted from center
         by a few pixels, but given that the alignment stars all looked fine
         it's not clear that realigning would make any improvements. 
         Initial counts look fine, skies are clear, seeing ~1".

         In retrospect, given the brightness of the targets and the 
         nature of these observations, the alignment stars are essentially 
         irrelevant once the initial alignment is done. 
         In order to reliably center the targets within a couple 
         pixels, it's probably best to do the initial alignment, take the 
         thru-slit image, open the image in ds9, measure the necessary 
         adjustment (using the object itself), and send that to the telescope 
         via the Telescope Services GUI, regardless of how this impacts the 
         alignment stars.
         
05:00 -- Looks like there's some weather that could become problematic
         at some point, but it's still a ways off.

06:00 -- Guide star flux has been reasonably steady, though there has
         been a some dramatic (0.3 mag) dips, and the PSF has been
         somewhat erratic throughout. Seeing has also been somewhat
         erratic, fluctuating between 1-2". 

06:30 -- Wind starting to pick up, occasionally approaching limit.
         Looks like some junk moving overhead on the all sky timelapse.

07:15 -- Finishing this last set of exposures and moving to MODS.
         Wind is starting to become problematic, may have to close.

08:45 -- Had to close for wind before we could start any MODS science,
         but we're back open and going to try again.

09:20 -- Started AT2017eaw.obs. Seeing 1-1.5", sky looks mostly clear,
         but there are a few scarce clouds.

09:50 -- Observing standard bd284211. There was a timeout error on mods1r 
         that caused and INSTCONFIG error. Looking at the dashboard, the 
         CCD readout menu looked hung, so we clicked update, and that
         seemed to resolve it. Seeing seems to really be deteriorating ~2",
         there's definitely some fluff moving through. Also, given the
         seeing and the proximity of the neighboring star, this may not
         be the most reliable flux standard...

10:30 -- Moving to AT2016gxp. There were some issues locating the guide star,
         almost certainly weather related. Clouds are fairly thick, guiding
         is going in and out.

10:50 -- Seeing is quite bad, but the object was marginally visible in the
         acquistion images, so we'll give it a shot.

11:15 -- Clouds getting pretty thick; we're done for the night.