Subject: 3.5m Night Log 20250213 From: cgray@apo.nmsu.edu Date: Fri, 14 Feb 2025 12:27:33 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Thursday, February 13, 2025 PROG PI ASTRONOMER OBSERVER(S) -------------------------------------------------------------------- EN01 B.Ketzeback C.Gray, R.McMillan, A.Townsand ON-SKY PROG INSTRUMENT START FINISH -------------------------------------------------------------------- EN01 Echelle 18:00 20:25 EN01 Kosmos 20:25 22:53 EN01 Kosmos 01:51 04:00 PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DTN START FINISH D B D B D B D B ----------------------------------------------------------------- EN01/R 17:56 06:38 0 5.5 0 0 1.1 6.1 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: C.Gray, R.McMillan The night started out with light clouds and good seeing and I thought I might grab some Venus data while I waited for the telescope to thermalize. While things started out nice, the humidity spiked and clouds came roaring in. I had to keep fighting the clouds to use kcam. I had to close several times due to humidity and radar popping up over us, though, it never actually rained. Things started clearing up during B half (more of a large sucker hole) and we were able to get on sky again for a few more hours before dust hame blowing in around 4:30 and we had to close again. Dust was peaking near 13K when I called it at 5:30 and were not able to reopen. slit ---Gfocus---Plate Scale khigh 1150 0.35 kosmos 1350 0.37 klow 1700 0.33 Instrument blocks were done for khigh, kosmos, and klow. Given the weather, I was only able to do the grid, not the ring. There was very little change to plate scale and rotation angle for each slit. I was able to test each new inst block on sky and all looked good. When I fudged RA/Dec of targets to see how they centered, each star came perfectly to the boresight. The kosmos cheat sheet has been updated with the new numbers. Happy Valentine's Day! ------- 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 -------------------------------------------------------------------------- 18:06 ecamera 622( -17) -32 64 0.8 1.3 1.7 2.0 0.8 ND3 0.85 22:02 kosmos 350( 678) -97 68 1.6 0.7 1.4 1.3 1.4 -- 0.88 02:53 khigh 375( 710) 193 69 2.5 0.8 1.7 1.5 1.8 -- 1.47 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 37 24 12 190 (S) 2351 mstly clr none 17:00 39 24 14 195 (SSW) 2824 mstly clr none 18:00 33 24 13 187 (S) 2944 mstly clr none 19:00 34 25 13 217 (SW) 1511 mstly clr none 20:00 34 27 16 204 (SSW) ptly cldy humid 21:00 34 28 15 253 (WSW) mstly cldy humid 22:00 35 30 16 232 (SW) cloudy humid 23:00 35 29 19 218 (SW) mstly cldy humid 00:00 35 28 20 202 (SSW) ptly cldy none 01:00 35 25 20 204 (SSW) ptly cldy none 02:00 36 24 23 208 (SSW) 1558 ptly cldy none 03:00 36 21 24 199 (SSW) 3044 ptly cldy none 04:00 35 20 25 208 (SSW) 5623 mstly cldy dust 05:00 35 20 22 181 (S) 12532 mstly cldy dust 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: 3.1.8