Date: Tue, 5 Jan 1999 07:15:29 -0700 (MST) From: Russet McMillan Subject: 3.5m Night Log 990104 Apache Point Observatory, Sunspot, NM Monday, January 4th, 1999 3.5-meter Night Observing Log Actual ----------------------------------------------------------------------- ASTRONOMER OBSERVER(S) INSTRUMENT DATE START FINISH ----------------------------------------------------------------------- E.Turner C.Hastings SPIcam 1/4 18:38 19:13 D.Zucker D.Zucker GRIM II 1/4-5 19:33 00:02 W.Offutt R.McMillan,J.Briggs SPIcam 1/5 00:22 04:26 A.Diercks G.Magnier GRIM II 1/5 04:46 05:39 ----------------------------------------------------------------------- INST SCHEDULED WEATH EQUIP OBS DAY NOTUSED I/RS/DN START FINISH D B D B D B USE D B ----------------------------------------------------------------------- PU01/S 18:38 19:23 - 0 - 0 - 0.8 0 - 0 UW07/R 19:23 00:12 - 0 - 0 - 4.8 0 - 0 DDO1/S 00:12 04:31 - 0 - 0 - 4.3 0 - 0 UW08/R 04:31 05:39 - 0 - 0 - 1.1 0 - 0 -------------- Activity Log -------------- 1st Half Observing Specialist: Camron Hastings The telescope was opened at 16:10 to begin cooling. The skies were again clear and no problems to report. Dan Zucker opted to use SPIcam for part of the time during his run, so I took flats for him as well as PU01 during twilight. We switched to GRIM later in his run. 2nd Half Observing Specialist: Russet McMillan Second half was clear. The seeing was extremely variable, ranging from 1.0 to more than 2.0 arcseconds and back. The temperature and windspeed were also very unstable. UW07 ran overtime once again, and since the beginning of the open time was scheduled for trans-neptunian objects while the end of the night was scheduled for GRIM, I didn't think it was worth it to switch to the echelle for less than an hour. So we stayed on the trans-neptunian objects a little longer. This time we were able to observe one of the fainter objects, since the moon had moved away, and we also got some data on the same Centaur asteroid as the previous two nights. John Briggs thinks these data will be very useful in computing orbits. ---Observer Comments--- D.Zucker (UW07): Tonight was extremely productive -- between SPIcam and GRIM I obtained some 1500 images. The telescope and instruments worked well, other than one guided SPIcam image that showed a bit of trailing (possibly due to a tracking jump or mirror hiccup?). Thanks to Camron for his assistance before and during my run, and to Russet for letting me run over with my calibration images. G.Magnier (UW08): Everything went smoothly tonight and we detected at least one of the SNe. FOCUS LOG January 4th 1999 Best Telescope Temp Wind Seeing Time Instrmnt Focus Az El Air/Truss Dir MPH filter FWHM" ---------------------------------------------------------------------- 18:20 SPIcam -110(5865) -120 43 -2.3/-2.8 350 15 g' 1.09" 18:25 Guider 51295(5865) -119 43 -2.3/-2.8 357 21 none 1.23" 20:40 GRIM II -150(6223) -066 13 -1.4/-1.9 016 09 f/5-J 1.52" WEATHER LOG January 4th 1999 Wind Time Temp-F Dewp-F MPH Direction Dust Sky Precip ------------------------------------------------------------------ 16:01 27 -4 7 343 (NNW) clear none 17:01 28 0 5 359 (N) clear none 18:01 28 1 11 358 (N) clear none 19:01 29 1 16 25 (NNE) clear none 20:01 30 2 16 6 (N) clear none 21:01 29 2 19 18 (NNE) clear none 22:01 29 2 11 344 (NNW) clear none 23:01 29 2 12 352 (N) clear none 00:01 30 2 18 17 (NNE) clear none 01:01 34 5 15 348 (NNW) clear none 02:01 30 4 8 0 (N) clear none 03:01 35 8 11 359 (N) clear none 04:01 33 5 12 349 (NNW) clear none 05:01 33 7 14 326 (NW) clear none 06:01 33 8 9 328 (NNW) clear none 07:01 33 7 12 64 (ENE) 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 for the 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: 2.42a Current guide software version: GIm Ctrl v3.0b 15.out - NCH, RM