Date: Sat, 10 Apr 1999 06:09:29 -0600 (MDT)
From: Russet McMillan
Subject: 3.5m Night Log 990409
                           FRIDAY APRIL 9, 1999
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
York              Adler              SPIcam     4/9      -     -
Krisciunas   Wyder, Krisciunas       SPIcam     4/9      -     -
Wyder             Wyder              SPIcam   4/9-10     -     -
Miller           Miller               DIS       4/10   03:03 05:15
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
UC12/R     19:24 20:54    -    -    -    -    -    -    0    -    -
UW02/R     20:54 21:54   1.0   -    0    -    0    -    0    0    -
UW03/R     21:54 01:10   3.3   -    0    -    0    -    0    0    -
NM03/S     01:10 05:15   1.9   0    0    0    0   2.2   0    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 remained closed due to dust.  The observers were all
very patient.
2nd half observing specialist: Russet McMillan
Dust levels dropped very slowly during second half, and the telescope
was opened just after 03:00.  The telescope was exposed for a few
hours to dust levels between 2000 and 3000.
The DIS focus was unexpectedly low (reaching -600 during focus changes
on the fly), but eventually climbed as the telescope temperature
stabilized.  Seeing measurements from the guider ranged from 1.2 to
greater than 2 arcseconds.
                            OBSERVER COMMENTS
N.Miller (NM03):
Smooth evening of observing, once the particulates settled down
and we opened. The telescope pointing was accurate and consistent,
and there were no problems with tracking even with sources near
transit. Thanks to Russet for helping make the most of the time
not claimed by weather!
                                FOCUS LOG
                              APRIL 9 1999
						 Wind
Time   Inst        Focus     Az  El   #Temp    Dir  MPH  filt  FWHM "
03:10 slitcam   -450(5678)   50  76  0.1/0.5   271  20    --   ~2.0
05:10 slitcam   -200(5809)  -57  77 -1.3/-1.3  292  24    --   ~1.6
#First temp is air, second temp is telescope.
                                 WEATHER
                              APRIL 9 1999
                               Wind
     Time   Temp F Dewp F  MPH  Direction    Dust      Sky      Precip.
     16:01    51     6     24   259  (W)    16353     cirrus     none
     17:01    50     7     31   270  (W)    28502     cirrus     none
     18:01    49     6     36   260  (W)    17237     cirrus     none
     19:01    46     2     32   269  (W)     8016     cirrus     none
     20:01    42     0     25   259  (W)     9477     cirrus     none
     21:01    40    -1     22   270  (W)     3835     cirrus     none
     22:01    37     1     20   279  (W)     6107     cirrus     none
     23:01    35     5     16   271  (W)     4174     cirrus     none
     00:01    35     4      9   263  (W)     6407     clear      none
     01:01    34     3     16   262  (W)     5123     clear      none
     02:01    33     3     19   262  (W)     4480     clear      none
     03:01    32     1     14   262  (W)     2582     clear      none
     04:01    31     1     12   262  (W)     2416     clear      none
     05:01    30     1     11   264  (W)     1703     clear      none
     06:01    29    -2     17   277  (W)     1695     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.
- Karen Gloria, Russet McMillan