From: Russet McMillan Subject: 3.5m Night Log 20010424 Date: Wed, 25 Apr 2001 06:03:23 -0600 (MDT) APACHE POINT OBSERVATORY 3.5m Telescope Night Log Tuesday, April 24th, 2001 ACTUAL ASTRONOMER OBSERVER(S) INSTRUMENT START FINISH -------------------------------------------------------------------- S.Anderson S.Anderson,B.Williams DIS-Low 20:05 00:55 C.Gronwall C.Gronwall DIS-Med 00:08 05:05 INST SCHEDULED WEATH EQUIP OBS DAY NOTUSED I/RO/DN START FINISH D B D B D B USE D B -------------------------------------------------------------------- UW01/R 20:37 01:00 0 0 0 0 4.1 0.3 0 0 0 JH01/R 01:00 05:25 0.3 0 0.1 0 4.0 0 0 0 0 note: scheduled times listed include instrument change time ------------- ACTIVITY LOG -------------- Observing Specialist 1st Half: Jack Dembicky Opened louvers and turned on telescope cooling fans at 17:15 under clear blue skies. Closed louvers to do DIS cal checkout at 18:45. Opened enclosure and louvers at 19:45. I focused the instrument for the observers at 20:05 and turned the instrument over to them at 20:20. We had pretty mediocre seeing in the 1.5 - 2.0 arc sec range for the first half of the night but it seemed to improved somewhat by midnight. Observing Specialist 2nd Half: Russet McMillan Cirrus started moving in around the beginning of first half, but when we were able to get a guide star the seeing ranged from good to moderate, around 0.8-1.3 arcsec. There was some sign of windshake, but for the most part the seeing was dependent on airmass. We've been having some trouble with noise on the DIS slitviewer the past few nights which seems related to the cooler drive level, so I took a few minutes between the two programs to change the default temperature. This helped, although it didn't completely eliminate the problem. There was an additional delay at the start of second half because the Mac at the JHU end was apparently unable to connect to the internet at all. Rather than spend a lot of time troubleshooting the Mac, I guided the observer through the basics of observing from a MCnode, and everything went smoothly once she got going. Clouds thickened around 0500, and the observer quit a few minutes early because few photons were getting through. --------------- INSTRUMENT FOCUS LOG ---------------- Air/Truss Wind Time Instrument Focus Az El Temp-C Dir MPH filt FWHM" ---------------------------------------------------------------------- 20:10 DIS-slit -100(824) 50 72 6.1/9.8 75 22 none 1.55 20:14 NA2gdr 2486(59536) 50 72 6.1/9.6 89 15 red 1.39 01:50 DISslit 50(795) 264 72 5.3/4.1 118 3 - 1.33 ------------- WEATHER CONDITIONS ------------ Wind Precip.or Time Temp F Dewp F MPH Direction Dust Sky Conditions ------------------------------------------------------------------ 16:01 57 15 14 248 (WSW) 573 Clear none 17:01 59 16 15 241 (WSW) 646 Clear none 18:01 56 17 16 204 (SSW) 597 Clear none 19:01 49 16 8 111 (ESE) 576 Clear none 20:01 44 17 11 82 (E) 587 Clear none 21:01 41 16 16 81 (E) 593 Clear none 22:01 39 16 15 73 (ENE) 636 Clear none 23:01 39 14 13 75 (ENE) 728 Clear none 00:01 39 14 12 79 (ENE) 639 Clear none 01:01 41 14 9 81 (E) 704 cirrus none 02:01 41 14 2 113 (ESE) 748 cirrus none 03:01 43 14 10 128 (SE) 675 cirrus none 04:01 42 14 8 110 (ESE) 754 ptly cldy none 05:01 43 12 9 110 (ESE) 766 ptly cldy 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 Primary, secondary, and tertiary mirrors in place and collimated. Primary support system operational. Mirror ventilation system in place. Telescope drives operational. Current Remark version: 2.62. Current guide software version: GIm Ctrlv3.0b27. Current TCC version: 2.5.1 Current MC version: v1_7_3.