Subject: 3.5m Night Log 20181226 From: cgray@apo.nmsu.edu Date: Thu, 27 Dec 2018 14:09:39 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Wednesday, December 26, 2018 ACTUAL ASTRONOMER OBSERVER(S) INSTRUMENT START FINISH -------------------------------------------------------------------- D.Chojnowski D.Chojnowski ECHELLE --:-- --:-- G.Stringfellow G.Stringfellow TSPEC --:-- --:-- N.Reynolds N.Reynolds TSPEC --:-- --:-- C.Gray C.Gray, S.Kovac Echelle --:-- --:-- INST SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DN START FINISH D B D B D B D B ---------------------------------------------------------------- NM01/R 17:13 18:13 1.0 0.0 0 0 0 0 0 0 CU07/R 18:13 21:12 3.0 0.0 0 0 0 0 0 0 OU05/R 21:12 03:33 0.5 5.8 0 0 0 0 0 0 NM05/O 03:33 06:55 0.0 3.4 0 0 0 0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: C.Gray The night started out very snowy. It was snowing all day and didn't stop until about midnight and we received nearly a foot of snow. Things cleared up after about 2am but then it was just freezing fog until dawn. I reduced and implemented the pointing model that was taken over Christmas: APO 3.5M Pointing Data 2018-11-28T04:46:03.0 T 100 5.0178 0.000 0.0000 IE -77.8122 1.46666 IA +125.1963 2.29404 AN +8.0253 0.60116 AW -18.2428 0.60679 CA -28.7882 1.80329 PZZ1 -37.7245 1.49308 END ============ * use * fit coeff change value sigma 1 IE -2.534 -80.35 2.147 2 IA -3.586 +121.61 3.419 3 AN +1.161 +9.19 0.857 4 AW -0.794 -19.04 0.835 5 CA -5.512 -34.30 2.720 6 PZZ1 -0.191 -37.92 2.154 Sky RMS = 5.79 Popn SD = 6.06 Observation #25 is a very weak outlier candidate. When I checked the DIS red camera after midnight I found that the pressure had increased to 1e-4. I called Bill and he helped make sure I got everything back and running. There must have been a power flicker but I don't recall one so it must have been small. DIS vacuum readings: UT bcam bpump rcam rpump 01:00 9.83-7 6.5E-8 5.08E-6 4.6E-7 07:00 6.58E-7 3.7E-8 1.68E-4 2.E-7 13:00 5.42E-73.10E-8 4.80E-6 3.6E-7 ------- FAILURE LOG ------- PROG INST FAILURE MODE TIME (SEDFNVOG) TI/SHU START FINISH DESCRIPTION ---------------------------------------------------------------------- ---------------- FOCUS LOG --------------- Time Instrument Focus Az El Temp Strc Prim Sec Air filt FWHM -------------------------------------------------------------------------- ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 24 23 17 271 (W) cloudy snow 17:00 23 21 15 269 (W) cloudy snow 18:00 24 23 17 268 (W) cloudy snow 19:00 24 22 23 265 (W) cloudy snow 20:00 24 22 25 268 (W) cloudy snow 21:00 23 22 24 280 (W) cloudy snow 22:00 23 21 19 278 (W) cloudy snow 23:00 22 21 22 294 (WNW) cloudy snow 00:00 22 21 22 293 (WNW) cloudy lt snow 01:00 22 20 21 286 (WNW) cloudy fog 02:00 21 20 22 318 (NW) cloudy fog 03:00 21 19 25 326 (NW) clear fog 04:00 20 18 19 319 (NW) clear humid 05:00 20 17 15 331 (NNW) ptly cldy humid 06:00 19 17 11 316 (NW) ptly cldy humid 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 STATUS Telescope drives operational. Current TCC version: 1.2.4 Current TUI version: 2.6.0