Date: Sun, 26 Oct 1997 06:22:24 -0700 (MST) From: Charles Corson Subject: 3.5m obslog 971025 SATURDAY OCTOBER 25, 1997 APACHE POINT OBSERVATORY OBSERVING LOG ACTUAL ASTRONOMER INSTRUMENT DATE START FINISH Holden DIS 10/25 --- --- Rockosi Spicam 10/26 00:45 6:20 INST SCHEDULED OBS WEATH EQUIP DAY NOTUSED I/RS/DN START FINISH D B D B D B USE D B UC02/R 19:42 23:47 0.5 0 3.6 0 0 0 0 0 0 UC04/R 23:47 04:53 0.7 2.9 0.5 0 1.0 0 0 0 0 (note: times listed include instrument change time) ACTIVITY LOG (* means a trouble report has been issued or appended to) The telescope was opened briefly at the beginning of the night, long enough to focus, but was soon closed due to high humidity. Brad Holden did not observe due to the weather, once the humidity lessened, the wind gusts of 40mph kept us from opening. Connie Rockosi was the UC04 observer, using Spicam, and was able to open at 00:45. Roughly 20% of her time was lost due to dome drive failure and subsequent azimuth drive velocity problem. After both drives were recovered and checked out, observing finally was underway with good weather conditions, but very poor seeing. The poor seeing improved only marginally as quick checks with the guider confirmed. Connie had reasonable success, some drift scanning, but the seeing did impact her observations. Otherwise, it was a good run. FOCUS LOG OCTOBER 25 1997 Best Telescope Wind Seeing Time Inst Focus Az El #Temp Dir MPH filter FWHM " 20:00 DIS -275(5871) 70 37 -6.9/-0.9 345 18 r 3.8 20:15 Guider 58000(5824) 69 37 -7.2/-2.4 20 20 r 3.1 02:10 SPI -150(5806) 222 50 -4.1/-5.1 42 11 r' 2.2 #The first temp is air, the second is truss, both in degrees Celsius WEATHER OCTOBER 15 1997 Wind Time Temp F Dewp. F MPH. Dir. Dust Sky Precip. 16:01 26 12 9 314 (NW) 176 clear none 17:01 24 14 8 321 (NW) 259 prtly cldy none 18:01 22 12 18 328 (NNW) 310 prtly cldy none 19:01 21 14 8 333 (NNW) 283 prlty cldy none 20:01 20 14 15 348 (NNW) 246 clear none 21:01 19 15 19 355 (N) 215 clear none 22:01 19 16 26 1 (N) 214 clear none 23:01 19 14 17 18 (NNE) 363 clear none 00:01 19 11 31 17 (NNE) 399 clear none 01:01 21 3 22 57 (NE) 161 clear none 01:01 24 4 5 15 (NNE) 189 clear none 02:01 23 6 8 39 (NE) 111 clear none 03:01 20 8 6 2 (N) 126 clear none 04:01 23 8 10 52 (NE) 87 clear none 05:01 23 9 24 41 (NE) 80 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 > 1 micron per 0.1 cu. ft. TELESCOPE STATUS Primary, secondary, and tertiary mirrors in place and collimated. Primary support system operational. Mirror ventilation system in place. Telescope drives operational. Current Remark version: 2.36. Current guide software version: GIm Ctrlv3.0b11. Charles