Date: Wed, 23 Jun 2010 04:16:50 -0600 (MDT) Subject: 3.5m Night Log 20100622 From: "Jack Dembicky" Apache Point Observatory 3.5m Telescope Night Log Tuesday June 22, 2010 ACTUAL ASTRONOMER OBSERVER(S) INSTRUMENT START FINISH ------------------------------------------------------------------- J.Greene J.Greene TSPEC 19:30 00:15 W.Bhatti W.Bhatti DIS --:-- --:-- PROG SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DN START FINISH D B D B D B D B ------------------------------------------------------------------ PU10/R 20:24 01:10 0 0.8 0 0.7 0 3.3 0 0 JH01/R 01:10 05:47 2.4 2.2 0 0 0 0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: J.Dembicky Spicam temp at start of night 178.2K Spicam temp 173.8K @ 00:30 SPICam temp 172.4 @ 04:15 03:47:29UT, 03:56:33UT, and 04:08:21UT NA2 rotator stopped tracking (status reported stop button). axis stop and init fixed the problem. The rotator angle seemed to be off from where it was a few seconds before (around -145) when it was tracking. I don't know if that was a physical change in rotation or not. After the 3rd error I went up and physically checked the rotator. It appeared that TSPEC is out of balance from about 90-170 deg and -90 to -170 deg, both sides of the instrument being inverted. I didn't see anything physically different with the instrument to cause the sudden balance issue. I recommended rotating the instrument 180 deg to my observer to get the rotator out of the bad spot. PR submitted TUI log dump ------------ 03:47:29 .tcc.0 0 tcc W RotStat=-60.374000,15.330560,4783981683.60000,0x20006801; BadRotStatus; RotDTime=-0.1; RotID=1,0 03:56:33 .tcc.0 0 tcc W RotStat=-55.334167,0.000000,4783982226.85000,0x20006801; BadRotStatus; RotDTime=-0.2; RotID=1,0 04:08:31 .tcc.0 0 tcc W RotStat=-54.159500,0.000000,4783982945.65000,0x20006801; BadRotStatus; RotDTime=-0.2; RotID=1,0 04:08:21 .tcc.0 0 tcc I TCCStatus="TTT","NNN"; TCCPos=-77.618,58.672,-154.075; AxePos=-77.616,58.674,-112.941 04:08:31 .tcc.0 0 tcc I TCCStatus="TTT","NNN"; TCCPos=-77.653,58.638,-154.124; AxePos=-77.651,58.639,-54.160 Dust closed us at 00:15, clouds kept us close the remainder of the night. ------------- FAILURE LOG -------------- PROG INST FAILURE MODE TIME (STEDFNVOG) TI/SHU START FINISH DESCRIPTION ---------------------------------------------------------------------- PU10 T I/H 03:47 04:27 TSPEC out of balance inverted ---------------- FOCUS LOG --------------- Time Instrument Focus Az El Temp Strc Prim Sec Air filt FWHM ----------------------------------------------------------------------- 20:40 TSPEC 150( 1121) -44 70 19.8 21.8 20.8 20.6 20.6 Ks 0.95 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------- 18:00 41 41 16 259 (W) 569 ptly cldy none 19:00 41 41 12 252 (WSW) 537 ptly cldy none 20:00 42 42 10 218 (SW) 651 mstly clr none 21:00 41 41 9 187 (S) 669 mstly clr none 22:00 40 40 2 141 (SE) 706 ptly cldy none 23:00 41 41 5 180 (S) 720 ptly cldy none 00:00 41 41 14 182 (S) 1141 mstly cldy dust 01:00 43 43 16 143 (SE) 6867 cloudy dust 02:00 42 42 11 181 (S) 4486 cloudy dust 03:00 41 41 8 184 (S) 3922 cloudy none 04:00 40 40 3 216 (SW) 2983 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 STATUS Telescope drives operational. Current TCC version: 2.11.1 Current TUI version: 1.7.4