01/13/2021 Civil 
Brotherton @ longslit (remote)
Outside Temp(F) -- 8 (Start) 
Outside Humidity(%RH) -- 79 (Start)
Wind Speed(MPH) -- 14 mph (Start)
Wind Direction -- 320 (Start)

Slit width 5 arcsec, set on September 17, 2020 empirically

900l/mm grating, sub-array center column 1050, width 360

Longslit focus set to 310 on instrument.

Seeing= 14.1 pix (0.38 arcsec per pixel) or 5.4 arcsec 

Centered for field, collimation numbers
at Dec 49   HA -01:07
0:00:21.9   -1:03:53.0

Fill LN2 #2 (04:15)

Flat at fixed -6.25 48, dome 15

Index	 	Object		EXP	secz	UT	T-Out 	Notes
------------------------------------------------------------------------------

Mirror checks ok

a001-10		Flat		3		11:52	8	Looks ok

a011-20		CuAr		2		11:58	8	@-100C

a021-30		Bias		0		12:00	8	@-108C

a031-33		HZ44		60	1.01	12:14	7	std
seeing bad...5.4"

Cold, dome laboring...
a034-36		NGC4151		100	1.01	12:20	7	snr=50+

a037-39		Mrk817		400	1.11	12:30	7	snr=70

a040-42		PG1534+580	300	1.11	12:56	7	snr=26+

a043-45		Mrk841		250	1.21	13:15	6	snr=20+

ending in twilight...

mirror looks good