Apache Point Observatory 3.5m Telescope Night Log Thursday, March 05, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- EN01 B.Ketzeback H.Abbot,A.Townsend ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- EN01 ARCTIC 18:00 20:10 EN01 KOSMOS 20:20 00:00 EN01 ARCTIC 00:10 06:00 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- EN01/W 18:12 00:10 0 0 0 0 2.3 3.7 0 0 EN01/W 00:10 06:16 0 0 0 0 0.0 6.1 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: H.Abbot,A.Townsend We had clouds in and out throughout A-half, and marginally high winds all night long. B-half was photometric! Seein was all over the place though. Engineering tasks completed tonight: - Restarted hub and tcc - Restart dome mac - Restarted axis controllers - Zeroed NA2 Rotator (-0.01) - Fully restarted dataq - KOSMOS slitviewer focus checks, consistent with previous measurements (no change needed) - Training for Harry on engineering and troubleshooting tasks - Multiple throughput measurements on each of SA104-428, G163-50, and SA107-1006 at a range of altitudes ------- 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 -------------------------------------------------------------------------- 19:27 arctic 433( 992) 87 74 7.3 7.8 8.1 7.3 7.2 g 1.58 20:31 kosmos 450( 863) 72 83 6.7 6.9 7.4 6.6 6.6 -- 1.11 23:33 khigh 500( 851) -22 68 5.6 5.4 6.0 5.4 5.6 -- 1.08 01:14 arctic 543( 939) 16 56 4.2 4.1 4.9 4.0 4.2 SDSS_g 1.16 02:23 arctic 517( 885) 53 43 3.4 3.3 4.1 3.2 3.1 SDSS_i 1.27 04:18 arctic 539( 799) 13 57 2.0 1.2 2.7 1.8 1.6 SDSS_i 1.42 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 52 5 20 244 (WSW) 1017 ptly cldy none 17:00 49 5 25 239 (WSW) 800 ptly cldy none 18:00 46 4 12 263 (W) 979 ptly cldy none 19:00 44 6 15 229 (SW) 1774 mstly clr none 20:00 45 6 19 241 (WSW) 1769 ptly cldy none 21:00 44 8 20 243 (WSW) 1001 ptly cldy none 22:00 43 8 20 245 (WSW) 1068 ptly cldy none 23:00 43 7 22 258 (WSW) 1169 mstly clr none 00:00 41 4 22 259 (W) 870 clear none 01:00 41 3 16 261 (W) 830 clear none 02:00 39 4 17 255 (WSW) 842 clear none 03:00 38 7 26 255 (WSW) 1039 clear none 04:00 36 8 19 214 (SW) 942 clear none 05:00 35 11 22 252 (WSW) 1087 clear none 06:00 33 11 20 222 (SW) 908 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