Date: Sat, 13 Feb 1999 05:57:51 -0700 (MST)
From: Russet McMillan
Subject: 3.5m Night Log 990212
                         FRIDAY FEBRUARY 12, 1999
                          APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
York             Pitluga             DIS        2/12   17:39 19:09
York             Richards            DIS      2/12-13  19:09 05:26
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
UC08/R     17:39  19:09   0    0    0    0   1.3   0   1.3   0    0
UC01/R     19:09  05:26   0    0    0    0   9.7  0.6   0    0    0
(note: times listed include instrument change time)
                              ACTIVITY LOG
(* means a trouble report has been issued or appended to)
Observing specialist: Russet McMillan
A group from WSMR was here during the afternoon in hopes of using
Amber to track a ballon launch.  Although they didn't get to track the
balloons, apparently some valuable progress was made.  They finished
with the telescope at approximately 16:30.
The entire night was clear and essentially problem-free, though a few
oddities were noticed.  Bias images taken with DIS before sunset and
during the brighter portions of twilight showed illumination on the
chip, even with the eyelid (and presumably the shutter) closed.
Gordon Richards reported that this was a distinct change from earlier
in the week, when DIS was used last.
Once the sky was dark, DIS appeared fine aside from some large focus
changes in the early part of the night (despite the fact that the
temperature was fairly steady and the telescope had been open for
hours).  Interestingly, the slit camera also seemed more sensitive to
light, easily acquiring 18th magnitude objects in a shorter time than
normal.
There were a few large pointing corrections, which were saved to the
log file Karen is constructing.
                            OBSERVER COMMENTS
G. Richards (UC01):
Excellent night.
                                FOCUS LOG
                             FEBRUARY 12 1999
						 Wind
Time   Inst        Focus     Az  El   #Temp    Dir  MPH  filt  FWHM "
18:45  DIS      -200(6172)   47  32  3.1/2.6   265    5  Gunn   1.5
19:20  DIS      -170(6025)   11  70  4.2/2.3   250    3  Gunn   1.1
20:20  slitcam     0(6251)   40  55  3.9/2.1   190    1  none    -
21:20  slitcam  -100(6120)   80  60  3.8/1.8   185    6  none    -
#First temp is air, second temp is telescope.
                                 WEATHER
                             FEBRUARY 12 1999
                               Wind
     Time   Temp F Dewp F  MPH  Direction    Dust      Sky      Precip.
     16:01    40    -4      1   248  (WSW)            clear      none
     17:01    41    -4      2   209  (SSW)            clear      none
     18:01    38    -7      0   222  (SW)             clear      none
     19:01    40    -6      0   238  (WSW)            clear      none
     20:01    41    -5      1   227  (SW)             clear      none
     21:01    39    -6      4   189  (S)              clear      none
     22:01    39    -6      5   183  (S)              clear      none
     23:01    39    -5      5   136  (SE)             clear      none
     00:01    39    -6      9   141  (SE)             clear      none
     01:01    40    -5      9   151  (SSE)            clear      none
     02:01    40    -5     12   155  (SSE)            clear      none
     03:01    40    -4     16   153  (SSE)            clear      none
     04:01    41    -4     17   131  (SE)             clear      none
     05:01    41    -4     17   144  (SE)             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
> 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: 2.52
Current guide software version: GIm Ctrlv3.0b17.
- Russet McMillan