Date: 2021 Mar 17 UTC
LBTO Observer: O. Kuhn
Lead Partner Observer: P. Vallely (OSU)
Other Partner Observers: R. Pogge (OSU)
Telescope Operator: none - John Hill first half, Steve Allanson second half from Tucson

Moon phase: 4d waxing crescent


Summary:

We used MODS all night, observing ASASSN14mu, ASASSN20qj, ASASSN16np
and ASASSN20hx from OSU_ASASSN and J1545 from OSU_EELGs.  

Conditions were clear and the seeing, though initially poor ~2",
tightened up near the beginning of the night and we ended the night
with subarcsecond seeing.

Temperature was very cold at the start of the night so telescope
equilibration was an issue at the start.

Calibrations: 

MODS flux standards GD71 and Feige67.


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

01:50 John opened the enclosure.
01:56 Pointing check

02:05 Flux Standard GD71

Collimated on a bright guide star (R<13). SX FWHM 2.3-arcsec when
collimated. DX slower to collimate.

02:15 acquisition, minor mess-up requiring an abort and restart.

02:22 12-deg twilight

02:31 executing dual grating


OSU_ASASSN/ASASSN14mu

02:47 acquiring ASASSN14mu

There is a bright spot but the galaxy is very extended and "horseshoe
shaped". We centered the bright spot in the slit (mods2r 11 below)
  
03:03 executing science obs

03:22 Seeing was poor at the start but seems to be tightening up
      around the end of the 1st exposure.

      About 1-arcsec @end of 1st exposure, 1.3/1.1-arcsec 0.8-arcsec
      on both, 5 min into 3rd exp
	

04:12 There was a comm glitch for MODS1R which required "red
      expdone". This was after writing the 3rd exposure, 16.. The red
      is now lagging about 100 sec behind the blue MODS1.

04:44 The seeing just dropped to 0.6-arcsec on both sides for a
      moment. On 5th of 6 exposures.


OSU_ASASSN/ASASSN20qj

05:17 acquiring ASASSN20qj, seeing about 1-1.5-arcsec during acquisition

      The SN was easy to see in the acq images. We centroided on it.
  
05:32 starting science observations, started 0.9-arcsec but puffing up
      to 1.5-arcsec at times.


OSU_ASASSN/ASASSN16np

06:41 acquiring ASASSN16np (UT0800 acq script)

      Right side got the wrong guide star - it is much too faint for a
      2 hr observation. Cntl+C'd the acquisition and John will correct
      pointing. Centroided on the nucleus of the galaxy. 

07:03 start science observations, sub-arcsec (~0.75-arcsec) seeing


Flux Standard Feige 67

09:17 acquiring Feige 67

09:28 spectra of Feige 67 (dual grating), subarcsec


OSU_EELGs/J1545

09:42 acquiring J1545 (10UT acq script)

09:58 science observations, about 1.2-arcsec.


OSU_ASASSN/ASASSN20hx

11:07 acquiring ASASSN20hx

11:19 science observations, seeing ~0.8 arcsec

12:05 18-deg twilight

12:29 finished 4th observation 

12:32 12-deg twilight

Closed up.