Date: Sat, 27 Oct 2001 06:42:45 -0600 (MDT)
From: Jack Dembicky
Subject: 3.5m Night Log 20011026
                         APACHE POINT OBSERVATORY
                         3.5m Telescope Night Log
                        Friday, October 26th, 2001
                                                           ACTUAL
 ASTRONOMER    OBSERVER(S)             INSTRUMENT      START  FINISH
 -------------------------------------------------------------------
 M.Strauss     X.Fan,V.Narayanan       DIS-Low         18:35   06:18
   INST        SCHEDULED     WEATH     EQUIP     OBS     DAY  NOTUSED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 PU02/R      19:12  06:23   0    0    0    0   3.4  7.8   0    0    0
 note: scheduled times listed include instrument change time
                  ------------- ACTIVITY LOG --------------
 Observing Specialist: Jack Dembicky
I started cooling the enclosure (fans and louvers) at 17:00.  Louvers were
closed for DIS checkout at 17:40 but fans were left on.  I opened the
enclosure around 19:05 when the observers finished taking their cals and
flats.  Seeing was mediocre at best around 1.5 arc sec.  We re-focused
about an hour later and the best we could manage was again about 1.5 arc
sec.  The seeing improved for about 30 mins around 23:00 but rapidly grew
worse in the 1.7-3.0 arc sec range and very variable.  The guider had a
hard time locking onto stars with such poor seeing but we managed.  Sloan
also reported deplorable seeing as well.
The seeing improved to sub arc sec at times (off the guider) after the
wind changed direction at 02:00.  The rest of the night saw seeing 1.5 arc
sec or better depending on the elevation of the telescope.  By around 4:30
the seeing once again started deteriorating back to around 2.5 arc by the
end of the night.
Everything ran smoothly hardware wise tonight other than a minor glitch in
the NA2 guider during checkout that was quickly resolved by Craig and
Myself.
               ---------------- FOCUS LOG ---------------
                                        Air/Truss   Wind
 Time   Instrument   Focus     Az  El    Temp-C    Dir MPH  filt   FWHM
 ----------------------------------------------------------------------
 19:05  DISslit     -330(411) 109  62    7.3/11.9   78  16  none   1.52
 19:18  NA2gdr    -635(56364) 112  64    7.0/10.9   79  18   R     1.63
 20:25  DISslit     -130(515) 106  48    6.3/7.8    84  11  none   1.53
 20:32  NA2gdr    -878(56121) 108  49    6.5/7.7    87  12   R     1.46
 22:40  DISslit      -70(484) 145  51    5.2/5.9    75  15  none   1.59
 22:44  NA2gdr     2000(5900) 146  52    5.2/5.9    76  17  none   2.12
 00:52  DISslit       90(595) 190  58    6.6/5.3    84   5  none   1.67
 00:52  NA2gdr    -754(56245) 190  58    6.6/5.3    84   5  none   2.05
              --------------- WEATHER LOG ----------------
                                 Wind                        Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:01    61    22      9   210  (SSW)    818  Cirrus      none
     17:01    57    23      5   245  (WSW)    609 Lt. Cirrus   none
     18:01    52    22      0   154  (SSE)   1206   Clear      none
     19:01    45    22     14    77  (ENE)   1010   Clear      none
     20:01    43    25     11    84  (E)      854   Clear      none
     21:01    44    23     12    87  (E)      756   Clear      none
     22:01    43    24     16    76  (ENE)    765   Clear      none
     23:01    41    30     15    77  (ENE)    891 Lt. Cirrus   none
     00:01    43    28      7    84  (E)      807   Clear      none
     01:01    45    25      1   105  (ESE)    701   Clear      none
     02:01    49    23      4   208  (SSW)    728   Clear      none
     03:01    49    24      5   185  (S)      705   Clear      none
     04:01    49    25      5   180  (S)      755   Clear      none
     05:01    48    24      7   181  (S)      755   Clear      none
     06:01    47    26      4   180  (S)      756   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
   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 Ctrlv4.1b2. Current TCC version: 2.5.5
   Current MC version: v1_7_3.