Date: 2020 July 16 UTC
Observers: Garnavich (ND) & Kuhn (LBTO)
TO: David Gonzalez (Tucson) + Tim Castro (LBT)
SA: Olga Kuhn

Moon phase: dark

Summary:

After clouds and even rain, the skies started to clear around 3 am and
we opened in time to obtain 3 5-min spectra on the bright target,
tic269. We did not have time to observe a spectrophotometric
standard. Calibrations for tic269 were taken in the morning.

There was rain earlier in the day and clouds at sunset. The enclosure
has not yet been opened at midnight. For a while, there were some
stars visible on the all-sky, but around 06UT, they closed in
again. At 3am, it started to clear and there were no clouds overhead
for a while. By about 6:00 am, the all-sky camera showed the sky
covered in clouds again.



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

Earlier in the evening, woke up both MODS and took pairs of sieveSnap
images. modsNc.20200716.0001.fits

07 UT: Waiting for the handover - so far the enclosure has not been
opened and now there appear to be drops of water on the allsky.

07:20 Reconfiguring from LUCI to MODS. 

07:30 The allsky no longer shows droplets, but the sky is still
covered by clouds.


08:18 Tim reports that it is currently raining. Again the allsky shows
droplets.

10:15 The allsky is showing more stars and the satellite and radar
look pretty good.


10:24 We are opening.  

10:42 Having some trouble pointing on SX or trouble focussing. We are
on a star near the tic269 target.

11:00 Pointing correction made. Now collimating.

11:03 acqBinoMODS tic_pa-50.acq
 Seeing ~1.2" on the DIMM and 1.3/1" on the guiders.
Alignment:
 mods1: 
MODS1 Offset Command:
   offsetxy -1.084 10.905 rel

0004 was the confirmatory thru-slit - looked good.

 mods2: 
MODS2 Offset Command:
   offsetxy  3.743  6.799 rel

0004 came up to the left. Gave a nudge 0.246" in dx 

11:14 execBinoMODS tic.obs
Red Channel spectra will be 5-7
Blue Channel spectra 2-4
On 6, seeing was 1.3-1.4", but it is going down to 1.1 - bouncing up and down.

11:37 acqBinoMODS feige110.acq 
We are well into twilight, but will give it a try.

MODS1 - a comm glitch on the PARTNER command, but it did not timeout,
just took a while.

11:41 Some clouds bubbling up on the allsky in the S. We cannot find
the guide star - it is too bright.

11:45 We are closing and taking cals: dual lamps, dual pixflats and 1"
dual slitflats; once we are closed.  I decided to add biases (1K and
8K) and 1K red-only r_sdss imaging flats in case they may be needed
for the acquisition images.
 
* There are four extra mods1r pixflats as mods2r ones. I ran the
command: execBinoMODS grpixflats_m1.txt grpixflats_m2.txt from
/home/modseng/modsScripts/modsCalibs_OT/Dual

The scripts differ only slightly and not so as to cause 4 extra images
on mods1r, so I don't know how they were taken. They could not have
been taken simultaneously with the UG5 blue flats, since the VFLAT
setting was 5, not 10, andit is clear the MODS1 script took longer
than the MODS2 one.

** During the final set of MODS1R slit flats that are taken by the 1"
   slit flat script (grslitflats_1.0_m1.txt in the same directory as
   above), I had an error on the Red GO "Go already in progress". Let
   abort/retry/ignore prompt sit unanswered as the exposures continued
   to be taken. When they were done, aborted the script. There seems
   to be 1 extra mods1r calibration.

13:33 Done: put both MODS to sleep.