Subject: 3.5m Night Log 20220423 From: decolib@apo.nmsu.edu Date: Sun, 24 Apr 2022 12:54:56 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Saturday, April 23, 2022 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- UV03 A.Verbiscer A.Verbiscer NM08 D.Bizyaev D.Bizyaev AP01 S.Merkowitz R.McMillan ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- UV03 ARCTIC 19:48 01:07 NM08 DIS 01:28 05:10 AP01 APOLLO 05:16 06:15 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- UV03/R 19:48 01:10 0 0 0 0 5.4 0.0 0 0 NM08/D 01:10 05:15 0 0 0 0 1.9 2.1 0 0 AP01/R 05:15 06:15 0 0 0 0 0.0 1.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: D.DeColibus It was dusty in the afternoon (outside counts ~4000-4500), and as soon as we opened the in-dome dust counts were hovering just below the limit (~3800). We ran the fans in reverse configuration, which kept the dust counts in the dome steady. We ended up hovering around 3000 counts both outside and in-dome (with reversed fans) for most of A-half, but at least the humidity never rose above 25%. UW08 was originally scheduled during B-half tonight, but informed us that they could not observe due to circumstances outside of their control. NM08 therefore took the B-half time as a drop-in program and observed with DIS, which performed just fine after the recent maintenance. No other problems tonight, and we closed up at 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 -------------------------------------------------------------------------- 20:19 arctic 603( 1263) 6 72 7.3 8.7 8.8 8.5 8.3 SDSS_r 1.03 21:31 arctic 521( 1102) -43 67 7.5 7.1 7.7 7.1 7.2 SDSS_r 1.37 00:35 arctic 414( 984) 24 34 6.7 6.4 7.0 6.4 6.6 SDSS_r 1.32 02:13 dcamera 554( 881) 284 52 7.1 6.3 6.8 6.3 6.6 -- 1.34 05:18 APOLLO 400( 1604) 58 31 5.5 5.3 6.0 5.3 5.4 530 1.70 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 54 12 21 259 (W) 3156 clear dust 17:00 52 7 18 253 (WSW) 2910 clear dust 18:00 51 7 25 263 (W) 3139 clear dust 19:00 50 9 20 245 (WSW) 3694 clear dust 20:00 45 9 17 259 (W) 4135 clear dust 21:00 45 8 22 243 (WSW) 3684 clear dust 22:00 46 8 19 265 (W) 3179 clear dust 23:00 45 11 15 272 (W) 3143 clear dust 00:00 45 9 13 262 (W) 2986 clear dust 01:00 44 9 12 265 (W) 2932 clear dust 02:00 45 8 14 272 (W) 2441 clear none 03:00 45 10 12 302 (WNW) 2304 clear none 04:00 44 11 10 266 (W) 2357 clear none 05:00 42 12 12 266 (W) 2646 clear none 06:00 42 13 8 266 (W) 2709 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