Subject: 3.5m Night Log 20200928 From: trudyk@apo.nmsu.edu Date: Tue, 29 Sep 2020 12:36:34 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Monday, September 28, 2020 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- UW08 B.Morris L.Hebb,S.Hawley CU06 J.Sebastian J.Sebastian ACTUAL PROG INSTRUMENT START FINISH -------------------------------------------------------------------- UW08 ECHELLE 19:44 01:10 CU06 ECHELLE 01:10 06:20 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- UW08/R 18:59 01:10 0 0 0 0.4 0.0 5.8 0 0 CU06/R 01:10 06:48 0 0 0 0.5 1.9 3.2 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: T.Rudyk Evening was clear with bad seeing. We had two telescope errors: one by moth, one by poiting. The moth is self-explanitory. The pointing was after a tert rotation from na2 to na1. We ended up about 30" off targets. A correction was issued to the y-tilt on the teriary: 100 arcsec downward. This fixed it well enough. Around 2:40 we had problems with the scope tracking downward in the west showing large oscillations in altitude. PR has been sent. Problem resolved temporarily by slewing to lower altitude and appraching target from below. We were open all night. ------- FAILURE LOG ------- FAILURE MODE TIME PROG INSTR TI/SHU START FINISH DESCRIPTION ---------------------------------------------------------------------- UW06 E T/H 19:44 19:49 moth...suicide by bearing UW06 E T/H 19:49 20:07 bad pointing after tert rotation cu06 E T/H 02:40 03:10 violent oscillations in altitude ---------------- FOCUS LOG --------------- Time Instrument Focus Az El Temp Strc Prim Sec Air filt FWHM -------------------------------------------------------------------------- 20:12 ecamera 660( -302) 116 72 3.4 4.1 5.0 3.7 3.5 ND3 2.89 21:25 ecamera 623( -415) 233 64 2.4 2.4 3.6 2.6 2.6 clear 2.35 22:38 ecamera 538( -526) 2 46 1.6 1.6 2.7 1.8 1.8 clear 2.67 01:17 ecamera 522( -457) -105 66 5.4 3.7 4.5 3.8 4.9 clear 1.52 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 49 30 10 307 (NW) 7764 clear none 17:00 48 30 6 335 (NNW) 8245 clear none 18:00 47 29 8 327 (NNW) 6151 clear none 19:00 41 20 13 73 (ENE) 718 clear none 20:00 38 20 15 88 (E) 764 clear none 21:00 37 20 18 73 (ENE) 565 clear none 22:00 36 20 15 77 (ENE) 629 clear none 23:00 37 21 6 36 (NE) 864 clear none 00:00 41 24 4 299 (WNW) 2573 clear none 01:00 42 24 7 317 (NW) 2434 clear none 02:00 41 24 4 292 (WNW) 2396 clear none 03:00 43 26 6 340 (NNW) 3487 clear none 04:00 44 27 6 349 (N) 3454 clear none 05:00 44 27 1 14 (NNE) 2579 clear none 06:00 42 28 1 330 (NNW) 2072 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: 1.2.4 Current HUB version: v20171231_01 Current TUI version: 2.6.0