Date: Fri, 25 May 2007 05:38:17 -0600 (MDT)
From: Jack Dembicky
Subject: 3.5m Night Log 20070524
                         Apache Point Observatory
                         3.5m Telescope Night Log
                          Thursday, May 24, 2007
                                                           ACTUAL
  ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
 --------------------------------------------------------------------
 D.York           J.Barentine, D.York    DIS            19:40  00:50
 J.Hughes         J.Hughes               SPIcam         02:00  05:35
   INST     SCHED(TWILIGHT)   WEATH     EQUIP     OBS     DAY  NOT USED
  I/ROW/DN    START FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 CU05/R     21:03   01:00    0    0    0    0    0   4.0   0    0    0
 UW04/R     01:00   04:57    0   1.0   0    0   2.5  0.5   0    0    0
   note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: J.Dembicky
 East wind = poor seeing all night.  Temperature took a nosedive about an
 hour before sunset, causing the humidity to rise.  We observed at the
 edge of closure limits all first half.  Since the primary/secondary were
 warmer than the other temps, and I didn't feel any condesation on the
 outside railing I felt it safe to push the limits a bit.
 The Primary (transverse load cell) was not happy below about 50 deg alt.
 Humidity closed us down for about an hour at the start of 2nd half.  Some
 pesky clouds came in around 03:30 as well, for about an 30 mins.
 No problems tonight.
                       ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
               ---------------- FOCUS LOG ---------------
 Time  Instrument  Focus    Az  El  Temp Strc Prim  Sec  Air  filt FWHM
 ----------------------------------------------------------------------
 20:25 DISslit    -25(223) 106  68   7.7 12.3 11.9  11.7  9.2  --    3.0
 01:15 SPIcam       0(251) -19  56   5.9  6.9  7.6   7.6  6.2   R    1.8
 01:21 NA2gdr -2776(27223) -21  55   5.6  6.8  7.3   7.4  6.2  clear 1.7
 02:17 SPIcam      25(283) -43  49   9.7  7.0  7.2   7.6  8.4   R    1.2
                 ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
 ---------------------------------------------------------------------
     16:00    63    34     11   254  (WSW)   1271    clear     none
     17:00    62    35      9   254  (WSW)   1084    clear     none
     18:00    60    33     11   266    (W)   1184    clear     none
     19:00    57    29      7   233   (SW)   1439    clear     none
     20:00    48    38     14    74  (ENE)    816    clear     none
     21:00    45    39     11    79    (E)    994    clear     none
     22:00    44    41     21    75  (ENE)   1454    clear     none
     23:00    44    41     18    77  (ENE)   2080    clear     none
     00:00    47    34      7   109  (ESE)   2273    clear     none
     01:00    44    38     12    72  (ENE)   1816    clear     none
     02:00    48    31      6   165  (SSE)   1968    clear     none
     03:00    51    31     10   149  (SSE)   1827  Pt. Cldy    none
     04:00    44    38     12   111  (ESE)   2254  Mst. clr    none
     05:00    43    38      8   108  (ESE)   2345    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: 2.9.0
      Current TUI version: TUI 1.3