Date: Wed, 25 Mar 1998 05:50:20 -0700 (MST) From: Tia Hoyes Subject: 3.5m obslog 980324 TUESDAY MARCH 24, 1998 APACHE POINT OBSERVATORY OBSERVING LOG ACTUAL ASTRONOMER INSTRUMENT DATE START FINISH Rodgers DIS 3/24 17:45 20:46 Fan DIS 3/24 20:46 06:00 INST SCHEDULED OBS WEATH EQUIP DAY NOTUSED I/RS/DN START FINISH D B D B D B USE D B UW03/R 19:40 20:40 1.0 0 0 0 0 0 0 0 0 PU02/S 20:40 04:38 7.7 0.3 0 0 0 0 0 0 0 (note: times listed include instrument change time) ACTIVITY LOG The telescope was opened at 18:50. Bernadette Rodgers was the first observer. We observed the HAEBE monitoring program. While I was focusing, I noticed the focus frames looked strange. I went up to the observing level and l found the eyelid to be stuck half way open. I opened and closed the covers and reopened the eyelid, and it was fine for the rest of the evening. Comments:Had a good run tonight. The only problem of note was at the start of the evening the eyelid had slipped partly closed, which caused a couple focus sequences to come up blank before Tia realized the problem. This cost us about 20 minutes (luckily it was during twilight). Other than that, the pointing was good and DIS performed well, no complaints! (I do, however, concur with other's comments on the poor response of the red chip.) I was able to get 41 total minutes of exposure in 12 images in about 70 minutes elapsed time- that's pretty efficient. Thanks Tia! Michael Strauss and Xiaohui Fan were on site to observe for the PU02 program. The GUIDER MAC crashed again, and I tried restarting it, but had to call Craig Loomis to actually fix the problem with communication to the GUIDER. (He mentioned he did not know specifically what was wrong) After it was fixed, it worked great for the rest of the evening(except when we were trying to guide on a sparce field). Comments:It was clear most of the night, and things went pretty smoothly. We were plagued by bad seeing though, sometimes as big as 2". And there were some clouds came from nowhere and covered the mountain for an hour and then disappeared. There was one high galacitc latitude field that guider couldn't find a bright enough star to guide on, and we moved the object along the slit a little bit to allow a brighter star entering the guider field, then things were ok. This is the last of our 3.5 nights run. We didn't lose any time due to weather: two of the nights being mostly photometric, and the other two with some clouds but still observable. It has been a quite good run, thanks Tia for all the help! (* means a trouble report has been issued or appended to) FOCUS LOG MARCH 24, 1998 Best Telescope Wind Seeing Time Inst Focus Az El Temp# Dir MPH filter FWHM " 20:50 DIS -100(6504) 108.9 45.4 8.8/10.65 267.1 19.9 IN 1.65 21:00 GUIDER 52000 111.3 47.0 9.4/10.41 269.7 21.7 empty 1.60 00:20 DIS -50(6389) 171.1 74.6 8.6/9.02 263.2 23.1 IN 1.59 # The first temp is air, the second is truss, both in degrees C. WEATHER MARCH 24, 1998 Wind Time Temp F Dewp. MPH. Dir. DUST Sky Precip. 16:01 55 14 14 250 (WSW) 228 clear none 17:01 56 15 14 266 (W) 231 clear none 18:01 53 15 22 268 (W) 277 clear none 19:01 51 16 13 253 (WSW) 284 clear none 20:01 51 17 14 257 (WSW) 341 clear none 21:01 48 19 16 269 (W) 265 clear none 22:01 48 21 15 270 (W) 228 clear none 23:01 48 20 15 259 (W) 287 clear none 00:01 48 18 26 268 (W) 321 clear none 01:01 47 15 26 266 (W) 369 partly cloudy none 02:01 46 14 16 285 (WNW) 321 partly cloudy none 03:01 45 14 13 277 (W) 412 clear none 04:01 44 16 21 283 (WNW) 433 clear none 05:01 44 14 13 283 (WNW) 415 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: 2.39 Current guide software version:GIm Ctrlv3.0b11. -Tia