Subject: 3.5m Night Log 20230121 From: cgray@apo.nmsu.edu Date: Sun, 22 Jan 2023 12:03:48 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Saturday, January 21, 2023 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- GS02 D.Gies K.Shepard UW02 P.Yoachim J.Jian NA01 A.Jaskot A.Jaskot ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- GS02 ECHELLE 17:34 21:23 UW02 ARCTIC 21:26 00:04 NA01 KOSMOS 00:18 03:05 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- GS02/R 17:34 21:25 0 0 0 0 3.9 0.0 0 0 UW02/R 21:25 00:10 0 0 0.1 0 2.7 0.0 0 0 NA01/R 00:10 06:55 3.9 0 0 0 2.9 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: C.Gray The night started out clear and beautiful! During UW02, seeing was at the site limit. However, the arctic filter wheel gave a few errors. At 23:07, there was a failure to move from the r filter to g while the instrument was at 115 deg. I tried homing several times and the filter came up as "?" and wouldn't change. I moved arctic to rotation 0 and it was successfully able to home and changed filters. The same problem happened at 23:27 when trying to move between the g and i filter while the instrument was at rotation of 132 deg. I wonder if there were issues because of the temperature; it was about -8 C at the time. And then...the wind. It quickly started gusting and jumped to near 40 mph around 3 am and did not diminish. At 4:40 am, NA01 called it quits. They were looking at faint targets in the direction of the wind and couldn't observe in twilight. ------- FAILURE LOG ------- FAILURE MODE TIME PROG INSTR TI/SHU START FINISH DESCRIPTION ---------------------------------------------------------------------- UW02 arctic I/H 23:07 23:11 Arctic filter wheel lost UW02 arctic I/H 23:27 23:31 Arctic filter wheel lost ---------------- FOCUS LOG --------------- Time Instrument Focus Az El Temp Strc Prim Sec Air filt FWHM -------------------------------------------------------------------------- 18:42 ecamera 524( -771) 241 32 10.0 -5.7 -5.7 -5.8 -7.1 ND1 1.51 20:13 ecamera 491( -896) 300 50 10.0 -7.3 -6.9 -7.5 -7.3 Clear 1.07 22:37 arctic 539( 237) -59 32 10.0 -8.0 -7.5 -8.1 -7.8 sdss-g 0.61 01:30 klow 500( 98) 109 61 10.0 -8.6 -8.0 -8.4 -8.2 -- 1.42 03:31 klow 627( 218) 146 46 10.0 -8.9 -8.4 -8.8 -8.5 -- 1.60 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 8 315 (NW) 274 clear none 17:00 12 319 (NW) 280 clear none 18:00 5 336 (NNW) 302 clear none 19:00 14 349 (N) 316 clear none 20:00 14 345 (NNW) 268 clear none 21:00 10 8 (N) 333 clear none 22:00 4 48 (NE) clear none 23:00 5 348 (NNW) clear humid 00:00 8 341 (NNW) 371 clear humid 01:00 8 1 (N) 356 clear none 02:00 7 345 (NNW) clear humid 03:00 23 12 (NNE) 333 clear none 04:00 29 24 (NNE) 483 clear 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