Subject: 3.5m Night Log 20250219 From: dembicky@apo.nmsu.edu Date: Thu, 20 Feb 2025 13:31:23 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Wednesday, February 19, 2025 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- CU04 K.McGouldrick K.McGouldrick UW06 C.Orion M.Frissell OU01 G.Jewett G.Jewett ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- CU04 TSPEC 18:01 19:49 UW06 ARCTIC 20:02 00:10 OU01 ARCTIC 00:10 06:13 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- CU04/R 18:01 20:01 0 0 0 0 2.0 0.0 0 0 UW06/R 20:01 00:10 0 0 0 0 4.2 0.0 0 0 OU01/R 00:10 06:32 0 0 0 0 0.5 5.9 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: J.Dembicky ARCTIC started throwing vacuum alerts shortly after I mounted the instrument for the 2nd program, Bill had me swap the ion pump controllers over to the old analog one in hopes it would be able to bring the soft vacuum back into spec. I (actually Conner from SDSS) did the swap at 21:08. It was showing a high load, as expected. I checked 30 mins later but it was still showing high load so I turned ARCTIC analog ion pump controller off @21:46 per Bill's email. I took ARCTIC off the telescope at the end of the night per Bill's request. ------- 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 -------------------------------------------------------------------------- 18:16 tcamera 354( 1166) 243 34 2.8 5.1 4.3 5.8 3.5 Ks 1.27 20:07 arctic 334( 803) 203 67 2.3 1.5 2.6 2.0 2.1 CUVR 0.83 20:10 NA2gdr 35172(35172) 204 67 2.4 1.5 2.7 2.0 2.1 R 0.99 00:18 arctic 349( 803) 156 79 2.8 1.3 2.6 2.2 2.4 BG40 0.74 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 39 9 5 326 (NW) 1438 ptly cldy none 17:00 38 11 7 276 (W) 1516 ptly cldy none 18:00 36 8 4 356 (N) 1536 mstly cldy none 19:00 36 8 7 330 (NNW) 1506 ptly cldy none 20:00 36 11 8 291 (WNW) 1602 mstly clr none 21:00 36 12 8 266 (W) 1996 mstly clr none 22:00 36 13 8 258 (WSW) 2359 clear none 23:00 37 12 15 275 (W) 1362 clear none 00:00 37 9 10 262 (W) 1646 clear none 01:00 37 11 13 248 (WSW) 1474 clear none 02:00 37 12 11 260 (W) 1429 clear none 03:00 36 12 12 237 (WSW) 1986 clear none 04:00 36 13 13 224 (SW) 1912 clear none 05:00 36 12 14 231 (SW) 2012 clear none 06:00 34 12 14 231 (SW) 1875 ptly cldy 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: 3.1.8