From:
Subject: 3.5m Night Log 20100822
Date: Mon, 23 Aug 2010 12:30:59 +0000 (UTC)
                        Apache Point Observatory
                        3.5m Telescope Night Log
                         Sunday August 22, 2010
                                                         ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT    START  FINISH
 -------------------------------------------------------------------
 S.Kent         B.Willet,B.Yanny        DIS           21:00  00:22
 J.Coughlin     J.Coughlin              SPIcam        00:34  06:15
  PROG        SCHEDULED      WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ------------------------------------------------------------------
 UC04/R     19:49  00:30    0   1.2   0    0    0   3.5   0    0
 NM02/R     00:30  06:23    0    0    0   0.2  0.7  5.0   0    0
   note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: R.McMillan
SPIcam temp 174.2K @ 18:30
Spicam temp 169.6K @ 06:15
 Although it was safe to open in twilight, some clouds prevented us
 from focusing until full dark, so I counted that time as lost to
 weather.  Clouds continued to come and go during first half, causing
 occasional guiding problems but not really preventing observations.
 Second half the clouds went away, and seeing was subarcsecond at
 least part of the time, but the observer was working defocused so I
 couldn't track the seeing.  A tracking slip of two arcminutes,
 apparently due to a suicidal moth on the azimuth drive disk, cost a
 few minutes of recovery time.  Later, when the target went through
 transit near 85 degrees, tracking was poor again, but this was the
 known issue at high altitude which we are continuing to
 investigate.  The observer was ready to cope with this expected
 situation and was able to work through it.
                ------------- FAILURE LOG --------------
  PROG   INST   FAILURE MODE     TIME
      (STEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
 NM02     S          T/H      01:13  01:23   tracked over moth
               ---------------- FOCUS LOG ---------------
 Time  Instrument  Focus    Az  El  Temp Strc Prim  Sec  Air  filt FWHM
 -----------------------------------------------------------------------
 20:57 dis-slit    41(  585) 264  44  17.4 18.8 18.2 18.1 18.0   - 1.50
                 ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     16:00    68    53     11   203  (SSW)    657  ptly cldy   none
     17:00    68    52      4   229   (SW)    686 mstly cldy   none
     18:00    66    51     10   221   (SW)    615 mstly cldy   none
     19:00    64    51      4   216   (SW)    752  ptly cldy   none
     20:00    63    51      7   186    (S)    763  ptly cldy   none
     21:00    63    52      6   182    (S)    740  ptly cldy   none
     22:00    63    50      7   175    (S)    701 mstly clr    none
     23:00    63    49     11   145   (SE)    760 mstly clr    none
     00:00    62    52     13   146   (SE)    840    clear     none
     01:00    62    52     13   145   (SE)   1002    clear     none
     02:00    60    52      5   117  (ESE)   1141    clear     none
     03:00    60    52     10   139   (SE)   1001    clear     none
     04:00    59    52      9   183    (S)    946    clear     none
     05:00    61    51      9   198  (SSW)    855    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 > 1u per 0.1 cubic feet.
                              TELESCOPE STATUS
      Telescope drives operational. Current TCC version: 2.13.0
      Current TUI version: 1.8.1