Apache Point Observatory 3.5m Telescope Night Log Monday, August 31, 2026 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- JH04 N.Oliveros-Gomez N.Oliveros-Gomez UW07 S.Hawley L.Hebb ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- JH04 NICFPS --:-- --:-- UW07 ECHELLE --:-- --:-- PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- JH04/R 19:38 01:10 1.6 3.9 0 0 0.0 0.0 0 0 UW07/R 01:10 06:30 0 5.3 0 0 0.0 0.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: H.Abbot Rain kept us closed for A-half, dust kept us closed for B-half. ARCSAT-user only had Maxim running, had to start the rest before observers could access webpage. Later in the night, arcsat users noted weird pattern in flatfields. I looked at a frame and it appeared to be frost forming. I advised them to increase the running temps, which seemed to fix the issue. May need a quick look-over to see if anything needs attention. Telescope and instruments were well behaved during checkout (barring the ARCTIC LL quad). ------- 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 -------------------------------------------------------------------------- ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 72 39 9 183 (S) 1143 ptly cldy none 17:00 70 38 10 141 (SE) 1146 ptly cldy none 18:00 71 35 7 142 (SE) 1132 ptly cldy none 19:00 69 43 6 119 (ESE) 1520 ptly cldy none 20:00 65 44 13 116 (ESE) 1916 ptly cldy lt rain 21:00 63 47 22 202 (SSW) 2065 mstly cldy rain 22:00 54 32 3 207 (SSW) cloudy rain 23:00 54 31 24 139 (SE) 4406 cloudy rain 00:00 56 31 14 178 (S) 9527 cloudy dust 01:00 55 31 6 216 (SW) 6044 cloudy dust 02:00 59 31 6 302 (WNW) 6238 ptly cldy dust 03:00 59 30 2 212 (SSW) 11430 ptly cldy dust 04:00 60 30 6 186 (S) 34658 ptly cldy dust 05:00 58 30 7 210 (SSW) 23806 clear dust 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: 3.2.2