Subject: 3.5m Night Log 20250917 From: mcroom@apo.nmsu.edu Date: Thu, 18 Sep 2025 13:16:58 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Wednesday, September 17, 2025 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- JH01 P.McCreery K.Schlaufman,P.McCreery OU01 G.Jewett G.Jewett AP01 S.Merkowitz R.McMillan,T.Sutherland ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- JH01 ECHELLE 20:15 01:04 OU01 ARCTIC 01:11 05:31 AP01 APOLLO 05:38 06:35 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- JH01/R 19:15 01:10 1.0 0 0 0 4.9 0.0 0 0 OU01/R 01:10 05:41 0 0 0 0 2.4 2.1 0 0 AP01/R 05:41 06:41 0 0.1 0 0 0.0 0.9 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: M.Croom Reset the all-sky (USB unplug/plug) multiple times. Weather delayed the opening for an hour, and we remained open until the final 6 minutes when clouds interfered with APOLLO. All three programs got data. OU01 ended their exposure series a few minutes ahead of schedule, allowing APOLLO a little head start. No adjustments were made in the program allocations reported here. A-Half observer's TUI disconnected (using masOS-26); but he regained connection right away. No telescope or instrument issues. Let me say in parting: thank you all for letting me be a part of the team. It has been the most wonderful and enriching experience - more than I ever hoped for when I embarked into my "retirement" endeavors. Seeing first-hand a wide variety of astronomy projects has been rewarding, but you people - those that are involved with the weekly and day-by-day operations at APO - have truly made this so incredibly special for me. I'll always cherish these times. Until we meet again, Mark ------- 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 -------------------------------------------------------------------------- 20:20 ecamera 503( 362) 139 82 12.5 16.2 15.7 16.2 13.5 Clear 0.90 21:42 ecamera 325( 68) 240 77 11.7 13.8 13.6 13.2 12.2 Clear 1.19 01:18 arctic 392( 1130) 15 53 12.0 11.4 11.9 11.3 11.8 BG40A1 1.00 05:45 APOLLO 442( 1846) 97 48 11.0 10.9 11.5 10.9 11.0 530 1.50 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 63 52 10 226 (SW) mstly cldy none 17:00 54 46 11 82 (E) cloudy none 18:00 55 48 1 234 (SW) mstly cldy none 19:00 52 47 9 107 (ESE) mstly cldy humid 20:00 54 46 12 144 (SE) mstly clr none 21:00 54 46 8 180 (S) ptly cldy none 22:00 53 46 6 128 (SE) mstly clr none 23:00 54 45 12 183 (S) mstly clr none 00:00 53 46 6 174 (S) ptly cldy none 01:00 54 45 10 184 (S) ptly cldy none 02:00 53 45 5 181 (S) ptly cldy none 03:00 53 46 6 198 (SSW) ptly cldy none 04:00 53 46 6 204 (SSW) ptly cldy none 05:00 53 47 5 253 (WSW) ptly cldy none 06:00 53 47 3 260 (W) 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