Apache Point Observatory 3.5m Telescope Night Log Tuesday, February 03, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- EN01 B.Ketzeback H. Abbot. A. Townsend, R. McMillan ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- EN01 TSPEC 18:00 19:40 EN01 KOSMOS 20:00 22:00 EN01 NICFPS 22:20 01:00 EN01 SHACK 01:00 02:00 EN01 NA2Guider 02:00 05:00 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- EN01/R 17:47 00:10 0 0 0 0 2.0 4.4 0 0 EN01/R 00:10 06:47 0 1.8 0 0 0.0 4.8 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: H.Abbot, A. Townsend Engineering Tasks accomplished: - Filter and slit change practice - TSpec training - kcam practice with focus checks - No change necessary to kcam gfocus values - NICFPS training - gcam practice and troubleshooting - Shack Hartmann collimation check - Also no change required - Russett tested APOLLO - Pointing model has no change required Filter menu for gcam was blank so we did gmech parameters, and then gcam had vignetting so we did gmech remap which fixed the problem. ARCSAT required a pointing update. We had various network issues all night. Both Amanda and I got kicked off TUI at the same time (~05:15) Seeing was quite good during A-half but degraded while we were doing the pointing model; wind speeds also increased to near the limit and we closed up at 05:00 when wind gusts were about 35 mph and seeing was over 5 arcseconds. ------- 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 -------------------------------------------------------------------------- 18:12 tcamera 446( 1005) -10 57 2.5 4.4 4.4 4.2 2.8 Ks 1.22 19:09 tcamera 461( 965) -20 76 3.6 3.4 3.8 2.9 3.2 Ks 1.05 20:36 kosmos 461( 653) 35 51 3.6 1.8 3.4 2.5 2.7 -- 1.31 21:37 NA2gdr 31515(31515) 10 57 3.2 1.6 3.0 2.3 2.8 Clear 1.40 22:44 NICFPS 603( 1180) -20 55 3.1 1.6 3.0 2.5 2.9 MK-J 0.82 23:17 NA2gdr 49904(49904) -36 53 2.9 1.5 3.0 2.4 2.7 Clear 1.28 01:12 shack 450( 1330) 124 58 2.3 1.1 2.4 1.7 1.8 -- 0.90 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 43 11 9 301 (WNW) 1243 clear none 17:00 39 16 6 291 (WNW) 1534 clear none 18:00 38 9 1 297 (WNW) 1213 clear none 19:00 38 7 21 24 (NNE) 1001 clear none 20:00 40 3 11 338 (NNW) 869 clear none 21:00 37 4 8 360 (N) 890 clear none 22:00 38 6 10 8 (N) 967 clear none 23:00 38 9 13 8 (N) 982 clear none 00:00 38 6 11 1 (N) 1046 clear none 01:00 36 9 18 358 (N) 1075 clear none 02:00 37 9 12 34 (NE) 592 clear none 03:00 32 12 18 55 (NE) 1153 clear none 04:00 29 14 33 65 (ENE) 1797 clear none 05:00 27 17 26 63 (ENE) 1238 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: 3.1.8