Date: Sun, 24 Jan 1999 07:29:17 -0700 (MST)
From: Russet McMillan
Subject: 3.5m Night Log 990123
                         SATURDAY JANUARY 23, 1999
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
Levenson     Levenson, Sankrit       GrIm2    1/23-24  18:53  00:10
Diercks      Deutsch, Diercks         DIS       1/24   00:10  05:37
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
JH03/S     18:53 00:10    0    0    0    0   0.3  5.0   0    0    0
DD01/R     00:10 05:37    0    -    0    -   5.5   -    0    0    -
(note: times listed include instrument change time)
                              ACTIVITY LOG
(* means a trouble report has been issued or appended to)
1st half observing specialist: Karen Gloria
The telescope was opened at 17:00 MST.  The air was warmer than the
telescope at the beginning of the night.  I don't know if this was the
cause of the large focus change we observed during the first hour of
observing, but the focus changed by 300 microns at the secondary,
which is a centimeter at the focal plane.  So, although the fwhm
values in the focus log are sub-arcsec, in reality we were often out
of focus, at least at the beginning of the night.
The scripts for dithering GrIm2 caused some confusion with the
observers, and this is because Remark and the MC have different
instrument offset sign conventions (and they are both different from
the TCC, in different ways).
2nd half observing specialist: Russet McMillan
Second half started out with thin high clouds, which persisted with
remarkable consistency through the morning.  The scheduled program,
NM07, was pre-empted by DD01 for spectra of the optical counterpart of
a GRB.  Apparently some useful data were obtained despite the clouds.
All the instruments behaved well, aside from the cloud camera getting
stuck in the north again.
                            OBSERVER COMMENTS
                                FOCUS LOG
                             JANUARY 23 1999
						 Wind
Time   Inst        Focus     Az  El   #Temp    Dir  MPH  filt  FWHM "
18:30  GrIm2  +250(6663)    188  57  5.6/4.8   267   8   2.122  0.79
19:30  GrIm2  + 75(6519)    161  51  5.5/4.9   270  10  K-short 0.78
19:45 guider 62000(6464)    110  66  4.3/4.9   270  10     R    1.5
20:00  GrIm2  - 50(6324)    116  69  3.9/4.8   269  14   2.122  0.97
03:00   DIS   -130(6284)     57  42  6.3/5.5   266   8   none   1.89
#First temp is air, second temp is telescope.
                                 WEATHER
                             JANUARY 23 1999
                               Wind
     Time   Temp F Dewp F  MPH  Direction    Dust      Sky      Precip.
     16:01    45     9     11   304  (NW)             cirrus     none
     17:01    46    11      2   274  (W)              cirrus     none
     18:01    44     9     10   268  (W)              cirrus     none
     19:01    42    11      9   269  (W)              cirrus     none
     20:01    39    12      8   268  (W)              cirrus     none
     21:01    42     8     12   253  (WSW)            cirrus     none
     22:01    43     3     12   267  (W)              cirrus     none
     23:01    43     5     13   265  (W)              cirrus     none
     00:01    42     5     11   241  (WSW)            cirrus     none
     01:01    43     6     14   234  (SW)             cirrus     none
     02:01    43     8     15   240  (WSW)            cirrus     none
     03:01    43     9     12   241  (WSW)            cirrus     none
     04:01    43     9     13   233  (SW)             cirrus     none
     05:01    44     9     15   271  (W)              cirrus     none
     06:01    44     9      9   263  (W)              cirrus     none
     07:01    44     8     14   212  (SSW)            cirrus     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: 2.42a
Current guide software version: GIm Ctrlv3.0b15.
- Karen Gloria, Russet McMillan