Subject: 3.5m Night Log 20210127 From: cgray@apo.nmsu.edu Date: Thu, 28 Jan 2021 13:08:17 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Wednesday, January 27, 2021 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- EN01 B.Ketzeback C.Gray, R.McMillan ACTUAL PROG INSTRUMENT START FINISH -------------------------------------------------------------------- EN01 DIS 17:40 06:15 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- EN01/W 17:40 06:52 0 0 0 0 0.0 13.2 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: C.Gray agile filter wheel was lost during checkout and had to be reconnected, same with NA2 guider and was likely due to the hub restart. The optidew sensor is reading 100% humidity again, I sent a PR (1813). We checked the focus on DIS and it did not need changing. We were going to try and test if the focus gave the same info while the instrument was upside down but, before we could test, the winds shifted. We went from subarcsecond to over 4" in a matter of min. Once seeing improved a little (and it wasn't great), we ran a pointing model. The clouds were terrible and we lost a few stars but were able to pull through. I wanted to get more info on homing mirrors so Russet walked me through many questions. I added notes into the wiki to make things a little more transparent for myself, including a diagram of what's physically happening (there are still some tweaks that need to be made to it). I took a pointing model but the weather was bad and there were multiple bad stars. I tried to reduce the pointing model but kept running into problems until the whole thing crashed on me and I gave up. ------- 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 -------------------------------------------------------------------------- 20:44 dcamera 576( 460) 159 68 4.0 2.5 3.5 3.2 3.6 -- 1.03 18:27 dcamera 654( 498) 84 75 1.1 1.7 1.4 2.3 1.2 -- 0.92 18:59 dcamera 559( 383) 82 78 0.6 1.3 1.3 1.4 1.1 -- 1.02 19:19 dcamera 521( 341) 51 70 1.4 1.1 1.4 1.2 1.3 -- 1.06 19:37 dcamera 514( 326) 43 72 1.2 1.0 1.4 1.0 1.1 -- 0.90 20:01 dcamera 530( 338) 25 75 0.8 1.0 1.3 1.1 1.4 -- 1.10 21:19 dcamera 416( 147) -44 72 -2.6 -0.7 -0.4 -1.2 -2.1 -- 2.82 23:23 dcamera 518( 224) -69 63 -1.3 -1.3 -1.1 -1.6 -1.5 -- 3.48 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 36 -8 4 256 (WSW) mstly clr none 17:00 36 -10 2 214 (SW) mstly clr none 18:00 33 -12 2 185 (S) mstly clr none 19:00 33 -11 5 187 (S) mstly clr none 20:00 34 -11 5 156 (SSE) mstly clr none 21:00 28 -18 6 106 (ESE) ptly cldy none 22:00 26 -18 11 139 (SE) mstly cldy none 23:00 30 -16 18 128 (SE) mstly cldy none 00:00 32 -15 21 134 (SE) mstly cldy none 01:00 38 -12 20 174 (S) cloudy none 02:00 39 -11 22 177 (S) cloudy none 03:00 36 -12 17 171 (S) cloudy none 04:00 35 -10 24 152 (SSE) cloudy none 05:00 35 -11 24 155 (SSE) cloudy 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: 2.6.0