Subject: 3.5m Night Log 20250716 From: ajt@apo.nmsu.edu Date: Thu, 17 Jul 2025 13:27:03 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Wednesday, July 16, 2025 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- EN02 B.Ketzeback A.Townsend ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- EN02 ECHELLE 23:34 00:39 EN02 ARCTIC 00:45 02:30 EN02 NICFPS 02:45 03:15 EN02 TSPEC 03:30 04:00 EN02 ECHELLE 04:18 05:00 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- EN02/W 20:20 05:59 3.2 0 0 0 0.3 6.1 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: A.Townsend Overcast with ight rain at the start of the night, but it cleared up around 23:00 and we had sub arcsecond seeing again. Motion error alt northwest slewing down at 68.5 alt at about 00:32. Engineering Tasks - New ThAr is very bright! Thanks! - OMEA all sky camera ran all night without dying - gcam flat check at start of night--looks same as yesterday - Wiki documentation updates - Pointing check on ECHELLE--looks good! - Took some on-sky data to compare new to old icc for Gordon's commissioning report - Throughput on two fields (SA110-232 and SA107-1006) before we had clouds come back in - Instruments are focusing at about 200 higher than yesterday, as expected (yay) - Focus comparison ARCTIC to NICFPS to TSPEC to ECHELLE. Mostly agree except NICFPS which is low by about 100. Inst block focus value has been updated but should be checked on sky. - Checked out NICFPS and TSPEC on sky (look good) - Did some initial on sky checks for echtilt script pointing update recommendations. SHOWFILLTIMES ran at end of night. ------- 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 -------------------------------------------------------------------------- 23:44 ecamera 301( 215) -87 59 16.8 17.3 18.1 17.2 16.6 ND2 0.95 00:49 arctic 313( 1282) -20 56 16.0 16.3 16.9 16.0 15.6 SDSS_g 0.87 02:31 arctic 362( 1276) 15 57 15.0 15.1 15.9 15.0 14.6 SDSS_g 0.81 02:58 NICFPS 283( 1592) 12 57 15.1 15.0 15.6 14.8 14.8 MK_Ks 1.15 03:06 NICFPS 280( 1587) 140 56 15.8 15.0 15.5 14.7 14.9 MK_Ks 2.02 03:14 NICFPS 289( 1590) -4 60 15.3 14.9 15.6 14.7 14.8 MK_Ks 1.27 03:38 tcamera 363( 1405) -7 60 15.0 14.7 15.3 14.5 14.6 Ks 1.06 03:49 tcamera 374( 1412) 90 66 15.9 14.7 15.3 14.4 14.8 Ks 0.84 03:57 tcamera 370( 1406) 136 71 15.8 14.7 15.3 14.5 15.0 Ks 0.93 04:37 ecamera 387( 170) 87 62 15.7 14.6 15.2 14.3 14.8 ND4 0.70 04:43 ecamera 388( 182) -44 43 14.0 14.5 15.2 14.2 14.5 ND3 0.83 04:54 ecamera 387( 157) 6 76 14.4 14.4 15.0 14.1 14.3 ND3 0.84 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 71 46 15 218 (SW) 2290 mstly cldy none 17:00 68 45 2 209 (SSW) 2226 mstly cldy none 18:00 65 45 12 92 (E) 1879 mstly cldy none 19:00 64 43 18 127 (SE) 1478 mstly cldy lt rain 20:00 61 43 19 112 (ESE) 928 mstly cldy lt rain 21:00 64 42 6 181 (S) 1704 mstly cldy lt rain 22:00 63 45 9 182 (S) 1839 mstly cldy none 23:00 64 42 10 189 (S) 1882 clear none 00:00 62 43 9 207 (SSW) 1816 clear none 01:00 61 46 3 256 (WSW) 2017 clear none 02:00 60 47 8 319 (NW) 2682 mstly clr none 03:00 60 49 10 322 (NW) 2383 mstly clr none 04:00 61 48 5 332 (NNW) 2049 mstly clr none 05:00 60 48 5 342 (NNW) ptly cldy none 06:00 60 48 7 356 (N) 1842 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