Date: Fri, 19 Dec 2008 07:09:47 -0700 (MST) Subject: 3.5m Night Log 20081218 From: "Jack Dembicky" Apache Point Observatory 3.5m Telescope Night Log Thursday, December 18, 2008 ACTUAL ASTRONOMER OBSERVER(S) INSTRUMENT START FINISH ------------------------------------------------------------------- C.Badenes A.Soderberg DIS 18:30 23:50 D.York D.York Echelle 00:00 01:00 D.York D.York DIS 01:00 07:00 INST SCHED(TWILIGHT) WEATH EQUIP OBS DAY NOT USED I/ROW/DN START FINISH D B D B D B USE D B --------------------------------------------------------------------- PU01/R 17:58 00:00 0.5 0 0 0 5.4 0.1 0 0 0 UC03/R 00:00 01:00 0 0 0 0 0 1.0 0 0 0 UC02/R 01:00 06:03 0 0 0 0 0 5.1 0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: J.Dembicky Az Measured 579.6 was 580.0 changed n/c Alt Measured -608.4 was -606.0 changed n/c NA2 shutter appeared stuck closed (or not opening fully) at the start of the night. It unstuck itself a little while later. Later we started seeing the Slitview shutter getting stuck closed (blank images while guiding). Temps were about -4C when this was occuring. Started sticking around 03:35 UT. Didn't see much before that. Rate was about 1 out of 3 frames were blank with a 10s exp time. We saw shutter failures all night, about 30-40% of exp failed. Near the end of the night things improved regarding the shutter not sticking nearly as much (most of the night it was having problems though). PR Submitted. ------- FAILURE LOG ------- PROG INST FAILURE MODE TIME (STEDFNVOG) TI/SHU START FINISH DESCRIPTION ---------------------------------------------------------------------- ---------------- FOCUS LOG --------------- Time Instrument Focus Az El Temp Strc Prim Sec Air filt FWHM ----------------------------------------------------------------------- 18:37 dis-slit -205( -586) -25 49 -3.2 0.0 -0.3 -1.3 -2.6 -- 2.25 19:38 dis-slit 124( -425) -81 68 -3.8 -3.0 -2.8 -3.7 -3.6 -- 1.58 19:40 NA2gdr 428(22428) -81 68 -3.8 -3.0 -2.8 -3.7 -3.6 clear 1.74 00:17 ECHELLE -149(-1335) -51 43 -2.4 -2.3 -2.1 -2.9 -2.4 clear 1.09 01:11 dis-slit -45( -568) -28 54 -2.4 -2.7 -2.5 -3.5 -2.8 -- 1.27 01:16 NA2gdr 2263(24263) -30 53 -2.1 -2.7 -2.3 -3.5 -2.6 clear 1.53 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------- 16:00 31 25 28 267 (W) 3198 cldy humid 17:00 29 25 21 268 (W) 3396 cldy humid 18:00 27 18 24 291 (WNW) 1118 pt. cldy none 19:00 25 18 12 275 (W) 771 clear none 20:00 26 17 13 280 (W) 659 clear none 21:00 25 17 9 299 (WNW) 829 clear none 22:00 31 -1 21 294 (WNW) 210 clear none 23:00 30 0 14 267 (W) 114 clear none 00:00 27 5 11 272 (W) 226 clear none 01:00 28 6 11 269 (W) 170 clear none 02:00 29 1 14 262 (W) 143 lt. cirrus none 03:00 29 1 17 249 (WSW) 129 lt. cirrus none 04:00 31 -5 18 266 (W) 101 lt. cirrus none 05:00 29 3 15 267 (W) 179 lt. cirrus none 06:00 28 3 18 273 (W) 188 cirrus 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 STATUS Telescope drives operational. Current TCC version: 2.9.1 Current TUI version: TUI 1.5.1