Subject: 3.5m Night Log 20230829 From: decolib@apo.nmsu.edu Date: Wed, 30 Aug 2023 12:18:32 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Tuesday, August 29, 2023 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- FG01 D.Buzasi D.Buzasi UW01 S.Hawley J.Libby-Roberts,M.Delamer ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- FG01 ECHELLE 19:40 00:55 UW01 ARCTIC 01:10 06:03 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- FG01/R 19:40 01:10 0 0 0 0 0.0 5.5 0 0 UW01/R 01:10 06:28 0 0 0 0 0.5 4.8 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: R.DeColibus Had to reset the mirror covers at checkout. The 3.5m Enclosure Optidew seemed to be reading humidity unusually high after sunset (humidity 90-92%, T ~13 C, DP ~11.8 C). In comparison, the Outside 3.5m Optidew reported H ~78%, T~13 C, DP ~9 C). The dome was open, the TelEx and Press fans were on, the louvers were closed, and the stairwell door was open. It seemed unlikely that the DP would differ that much between the two sensors given their proximity to one another, and the telescope temperature sensors were all well above the dewpoint. I decided to operate on the guidance of the Outside 3.5m Optidew instead. Some intermittent clouds started forming over us around 04:45. We were open all night with no issues. ------- 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 -------------------------------------------------------------------------- 20:22 ecamera 595( 527) 139 63 12.8 13.4 14.3 13.1 13.1 ND2 1.94 21:44 ecamera 427( 311) 188 77 12.8 12.6 13.4 12.6 12.7 ND1 1.53 01:23 arctic 390( 1298) 11 72 11.2 10.9 11.6 10.9 11.1 Semrock 0.98 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 59 50 7 322 (NW) 728 ptly cldy none 17:00 58 51 13 54 (NE) 813 mstly clr humid 18:00 57 51 16 73 (ENE) 657 mstly clr none 19:00 57 50 19 70 (ENE) 560 mstly clr none 20:00 56 50 18 82 (E) 691 mstly clr none 21:00 55 49 24 68 (ENE) 735 mstly clr none 22:00 54 47 24 69 (ENE) 532 clear none 23:00 54 46 25 77 (ENE) 434 clear none 00:00 53 45 22 72 (ENE) 555 clear none 01:00 52 46 22 66 (ENE) 901 clear none 02:00 53 43 18 67 (ENE) 1120 clear none 03:00 55 38 18 67 (ENE) 809 clear none 04:00 55 39 12 67 (ENE) 646 ptly cldy none 05:00 54 38 13 66 (ENE) 632 ptly cldy none 06:00 54 36 13 63 (ENE) 719 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: 3.1.3beta0