Subject: 3.5m Night Log 20210712 From: ajt@apo.nmsu.edu Date: Tue, 13 Jul 2021 12:17:44 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Monday, July 12, 2021 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- NM01 M.Croom C.Churchill,B.Stemock,F.Hasan UW04 P.Yoachim J.Jiang ACTUAL PROG INSTRUMENT START FINISH -------------------------------------------------------------------- NM01 DIS 20:57 01:04 UW04 ARCTIC 02:14 05:51 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- NM01/R 20:22 01:10 0 0.5 0 0 2.6 1.7 0 0 UW04/R 01:10 05:56 1.0 0 0 0 3.8 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: A.Townsend,R.McMillan At the start of the night we had some clouds, high smoke, and fairly high humidity, so we opened about half an hour late. The optical cloud camera froze at 18:07; resetting the router did not fix the problem. 1-micron dust counts steadily rose (possibly due to smoke) so I double-checked them with the handheld dust counter, and then monitored them outside with it once the dust counters shut down due to high humidity--we did have the dome open with dust counts above 3000 and a dewpoint difference of about 3 degrees for a while though. During the instrument change I took the handheld dust counter upstairs and checked there, and the dust count was too high so we closed the dome at the start of B-half. The humidity and dust count both started going down around 02:00, and we opened up at about quarter after 2. The rest of the night went smoothly, although the dust counts are back up around 4000 now after sunrise. ------- FAILURE LOG ------- FAILURE MODE TIME PROG INSTR TI/SHU START FINISH DESCRIPTION ---------------------------------------------------------------------- ---------------- FOCUS LOG --------------- Time Instrument Focus Az El Temp Strc Prim Sec Air filt FWHM -------------------------------------------------------------------------- 21:09 dcamera 726( 1268) 124 67 13.6 16.3 16.1 16.1 14.2 -- 2.07 02:24 arctic 548( 1092) -124 35 13.4 12.2 12.8 12.0 12.8 SDSS_r 1.69 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 64 59 9 219 (SW) 2103 cloudy none 17:00 64 56 12 201 (SSW) 1994 cloudy none 18:00 62 56 1 236 (SW) 2027 cloudy none 19:00 62 56 3 215 (SW) 1964 mstly cldy none 20:00 59 52 8 90 (E) 2410 mstly cldy none 21:00 57 50 10 93 (E) ptly cldy none 22:00 56 48 12 85 (E) 2634 mstly clr none 23:00 56 46 11 88 (E) 2903 mstly clr none 00:00 54 50 10 86 (E) mstly clr humid 01:00 54 49 9 86 (E) mstly clr dust 02:00 54 48 9 88 (E) mstly clr dust 03:00 58 41 11 63 (ENE) 3385 mstly clr none 04:00 57 42 11 81 (E) 3418 mstly clr none 05:00 55 44 7 92 (E) 3757 mstly clr none Note: the wind was coming from the azimuth listed. The convention used is north=0 degrees, east=90 degrees. The dust count is particles > 1u per 0.1 cubic feet. ---------- TELESCOPE SOFTWARE ---------- Current TCC version: 1.4.2 Current HUB version: v20171231_01 Current TUI version: 2.6.0