From: Subject: 3.5m Night Log 20100809 Date: Tue, 10 Aug 2010 11:37:05 +0000 (UTC) Apache Point Observatory 3.5m Telescope Night Log Monday, August 9, 2010 ACTUAL ASTRONOMER OBSERVER(S) INSTRUMENT START FINISH ------------------------------------------------------------------- M.Klaene R.McMillan SPIcam,Fastcam, 21:00 05:30 SH,DIS INST SCHEDULED WEATH EQUIP OBS NOT USED I/ROW/DN START FINISH D B D B D B D B -------------------------------------------------------------------- EN02/O 20:03 06:15 0 0 0 0 10.2 0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist: R.McMillan A lovely clear night with good seeing throughout. I obtained high-altitude tracking data with both SPIcam and fastcam. Tracking above 85 degrees was bad enough that the star fell off the edge of fastcam, but I kept going without offsets and after transit the star came back into the field. This may affect the usefulness of the dataset, but it was easy to tell that the pointing errors were in the same direction for both instruments. I also obtained some regular-style fastcam data; although there was almost no wind, these data may be useful for testing a new drive algorithm. Next I did an altitude sweep with the Shack-Hartmann from low to high altitude, confirming that our automatic adjustments for sag are reasonably good up until 84 degrees or so, when the prescription changes rapidly. Lastly, I obtained some throughput data with DIS. Spicam 2100 174.3 0500 169.3 ------- 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 -------------------------------------------------------------------------- 21:48 SPICAM 56( 773) 100 75 15.2 17.8 16.7 16.5 16.1 r 0.74 00:21 FASTCAM 125( 1188) 86 73 15.4 15.6 16.0 14.9 15.4 1.00 04:51 dis-slit 125( 470) -98 49 15.3 14.8 15.2 14.3 14.6 - 1.10 ------------- WEATHER LOG ---------------- Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:00 69 45 5 248 (WSW) ptly cldy none 17:00 70 45 11 267 (W) ptly cldy none 18:00 69 42 9 325 (NW) ptly cldy none 19:00 66 45 10 296 (WNW) mstly clr none 20:00 62 45 1 284 (WNW) mstly clr none 21:00 63 44 1 235 (SW) clear none 22:00 59 50 8 89 (E) clear none 23:00 62 46 2 184 (S) clear none 00:00 60 46 1 187 (S) clear none 01:00 60 44 5 183 (S) clear none 02:00 60 45 4 189 (S) mstly clr none 03:00 61 44 6 201 (SSW) clear none 04:00 58 46 5 186 (S) clear none 05:00 60 44 2 226 (SW) clear 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: 2.13.0 Current TUI version: 1.8.0