Date: Sat, 11 Sep 2004 06:15:20 -0600 (MDT)
From: John Barentine
Subject: 3.5m Night Log 200409010
                         Apache Point Observatory
                         3.5m Telescope Night Log
                        Friday, September 10, 2004
                                                          ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START FINISH
 --------------------------------------------------------------------
 D.York          J.Barentine            DIS            20:00  01:02
 J.Hennawi       J.Hennawi              DIS            01:05  06:15
  INST        SCHEDULED      WEATH     EQUIP     OBS     DAY  NOT USED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 UC05/O      20:09  01:00   0    0    0    0   4.8   0    0    0    0
 PU01/R      01:00  05:51   0    0    0    0   2.7  2.2   0    0    0
 note: scheduled times listed include instrument change time
                  ------------- ACTIVITY LOG --------------
 Observing Specialist: J.Barentine
 Opened to cool at 19:50 after a series of DIS cals.  First half was quiet
with average seeing and passing waves of thin cirrus.  After the shift
change, the wind made its way quickly around to the west and we had some
of the best seeing I've ever witnessed.  DIMM reported as low as 0.36
arcsec (!!!) and the NA2 guider bottomed out near 0.60 arcsec as it became
undersampled.  Clouds came in thicker during the latter part of the half
but did not cause us to close.
                      ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEGDFVO)    TI/SHU   START  FINISH  DESCRIPTION
 -----------------------------------------------------------------------
                 ---------------- FOCUS LOG ---------------
                                          Air/Truss   Wind
 Time   Instrument   Focus     Az  El    Temp-C    Dir MPH  filt  FWHM
 ---------------------------------------------------------------------
 20:15 DISslit     -100(1488)  132 45  13.6/17.0  147  8    -     1.07
 20:18 NA2gdr      -1346(29653)133 45  13.7/16.8  148  9    R     0.84
 22:45 NA2gdr      -3188(27811)187 57  12.4/13.1  107  8    R     1.09
 00:12 DISslit     50(1446)    222 49  14.4/13.0  177  2    -     1.28
                ------------- WEATHER LOG ----------------
                                  Wind                       Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
     ------------------------------------------------------------------
     16:01    66    27      6   214  (SW)     458  MstlyClr    none
     17:01    67    28      5   254  (WSW)    509  MstlyClr    none
     18:01    65    27      9   248  (WSW)    487  MstlyClr    none
     19:01    59    25      4   262  (W)      389  MstlyClr    none
     20:01    56    21      8   160  (SSE)    394  MstlyClr    none
     21:01    56    21      7   137  (SE)     552  MstlyClr    none
     22:01    55    22     12   137  (SE)     442  MstlyClr    none
     23:01    55    25      7   121  (ESE)    572  MstlyClr    none
     00:01    57    24      4   127  (SE)     396  MstlyClr    none
     01:01    59    23      1   224  (SW)     438  MstlyClr    none
     02:01    56    24      1   294  (WNW)    437  MstlyClr    none
     03:01    55    27      2   254  (WSW)    430  MstlyClr    none
     04:01    55    27      2   257  (WSW)    423  MstlyClr    none
     05:01    53    26      7   352  (N)      374  MstlyClr    none
     06:01    55    19      5     1  (N)      314  MstlyClr    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 Remark version: 2.85b
     Current TCC version: 2.7.2  Current TUI version: TUI 90b4