Subject: 3.5m Night Log 20210528 From: decolib@apo.nmsu.edu Date: Sat, 29 May 2021 12:25:31 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Friday, May 28, 2021 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- UV04 R.Wilson R.Wilson BY01 B.Boizelle B.Boizelle UW12 B.Morris L.Hebb ACTUAL PROG INSTRUMENT START FINISH -------------------------------------------------------------------- UV04 ECHELLE 20:15 01:06 BY01 TSPEC 01:14 02:33 UW12 ECHELLE 02:38 05:22 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- UV04/R 20:13 01:10 0 0 0 0 2.7 2.2 0 0 BY01/R 01:10 02:40 0 0 0 0.3 0.0 1.2 0 0 UW12/R 02:40 05:48 0 0 0 0 0.0 3.1 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: D.DeColibus Severe thunderstorms this afternoon in the counties east of us, but no threat to us; the skies were clear at APO, and stayed that way all night. There was a mishap with the TSpec fill cap being left off the instrument after afternoon checkout; we noticed the boil-off sensor temperature about 10 K above normal around 01:00. I filled the TSpec main tank again as a precautionary measure and we were back on sky and observing by 01:30. None of the other temperature sensors in the instrument warmed by more than 1 K, the vacuum did not seem to be affected, and there was no apparent impact on the instrument or science data. While I did notice some minor ( 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