Date: Thu, 11 Jun 1998 05:07:11 -0600 (MDT) From: Karen Gloria Subject: 3.5-m obslog 980610 WEDNESDAY JUNE 10, 1998 APACHE POINT OBSERVATORY OBSERVING LOG ACTUAL ASTRONOMER OBSERVER(S) INSTRUMENT DATE START FINISH Konigl Mazeh GRIM2 6/10-11 - - Harrison Harrison DIS 6/11 - - INST SCHEDULED OBS WEATH EQUIP DAY NOTUSED I/RS/DN START FINISH D B D B D B USE D B UC11/R 21:52 01:10 - 0 - 3.3 - 0 0 - 0 NM01/R 01:10 04:13 - 0 - 3.1 - 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 not opened tonight, due to rain, clouds, fog and humidity. We had rain until sunset, followed by dense fog. The sky cleared after midnight, but the air remained very humid. The observers were Tzevi Mazeh for UC11 and Tom Harrison for NM01. *The dewpoint sensor was giving anomalously low dewpoint temperatures, so could not be used to reliably gauge the humidity after the sky cleared. I relied on the humidity sensor that shuts off the pressurization fans at greater than 85% humidity, and my nose. Unfortunately, the onsite remote automatic weather station the Forest Service maintains was not posting data at the time. Usually that provides a backup reading. OBSERVER COMMENTS FOCUS LOG JUNE 10 1998 Best Telescope Wind Seeing Time Inst Focus Az El #Temp Dir MPH filter FWHM " - no focus data - #The first temp is air, the second is truss, both in degrees Celsius WEATHER JUNE 10 1998 Wind Time Temp F Dewp. F MPH. Dir. Dust Sky Precip. 16:01 37 37 15 309 (NW) 571 overcast rain 17:01 38 37 20 280 (W) 708 overcast rain 18:01 44 34 16 237 (WSW) 394 overcast lt rain 19:01 40 38 18 187 (S) 420 overcast lt rain 20:01 39 38 19 186 (S) 641 overcast none 21:01 39 39 16 233 (SW) 16 fog none 22:01 40 31 13 265 (W) 150 fog none 23:01 40 32 18 272 (W) 251 fog none 00:01 39 29 27 287 (WNW) 3702 fog none 01:01 38 32 17 302 (WNW) 1232 patchy fog none 02:01 38 31 20 272 (W) 898 patchy fog none 03:01 38 31 17 277 (W) 875 clear none 04:01 38 37 16 277 (W) 3137 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: 2.41a. Current guide software version: GIm Ctrlv3.0b15. -Karen