Subject: 3.5m Night Log 20240915 From: dembicky@apo.nmsu.edu Date: Mon, 16 Sep 2024 13:00:13 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Sunday, September 15, 2024 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- AP02 S.Merkowitz R.McMillan JH02 S.Li S.Li NM01 A.Conly A.Conly, N.Chanover ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- AP02 APOLLO --:-- --:-- JH02 ECHELLE 22:00 00:00 NM01 ECHELLE 02:10 06:40 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- AP02/R 19:12 21:30 0 2.3 0 0 0.0 0.0 0 0 JH02/R 21:30 01:10 0 1.7 0 0 0.0 2.0 0 0 NM01/R 01:10 06:40 0 0.8 0 0 1.7 3.0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: J.Dembicky Clouds at the start of the night with precipitation nearby on radar. We did not open for APOLLO but did more obs spec training. 121 got a fiducial error in az on test slew. I also saw a few slips in Alt during test slews but they cleared We finally opened, after the nearby threat of rain subsided around 22:00. Clouds formed over us once again around 00:00. We stayed open but the clouds were too thick to get anything useful. The observer used the time for cals. The sky started to improve again around 01:30 and we went back on sky around 02:00. Telescope NA2 rotator was zero'ed at the start of the night for mounting DIFFIT today. Teertiary will need to be moved during the daytime to NA2. No problems tonight ------- 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 -------------------------------------------------------------------------- 22:15 ecamera 513( 493) 77 77 13.2 14.6 16.0 14.4 13.5 ND1 1.40 02:24 ecamera 328( 234) 134 43 12.4 12.6 13.2 12.6 12.6 ND1 1.67 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 63 45 7 113 (ESE) 1062 cloudy none 17:00 65 45 5 179 (S) 956 cloudy none 18:00 64 43 5 198 (SSW) 855 cloudy none 19:00 63 37 1 203 (SSW) 755 cloudy none 20:00 61 39 12 128 (SE) 879 mstly cldy none 21:00 57 43 13 104 (ESE) 907 ptly cldy none 22:00 56 42 14 101 (E) 815 mstly clr none 23:00 55 41 14 82 (E) 1000 ptly cldy none 00:00 55 41 13 111 (ESE) 895 cloudy none 01:00 57 41 15 119 (ESE) 739 ptly cldy none 02:00 56 37 17 126 (SE) 817 ptly cldy none 03:00 54 36 15 119 (ESE) 829 ptly cldy none 04:00 54 35 12 115 (ESE) 851 ptly cldy none 05:00 55 34 18 133 (SE) 770 mstly clr none 06:00 56 34 14 133 (SE) 826 mstly clr 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: 3.1.5