From: Russet McMillan
Subject: 3.5m Night Log 19991219
Date: Mon, 20 Dec 1999 06:22:10 -0700 (MST)
Content-Type: TEXT/PLAIN; charset=US-ASCII
                         SUNDAY DECEMBER 19, 1999
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
Duncan            Rebull             Echelle 12/19-20  19:05 00:10
Brown             Brown              Echelle    12/20  00:10 06:03
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
UC01/R     17:58 00:10    -   1.1   -    0    -   5.1   0    -    0
WS01/R     00:10 06:03    0    0    0    0   1.6  4.3   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: Loomis
The beginning of the night was frustrating, weatherwise.  The
telescope was opened at 17:00 MST, and closed at 17:15 due to
threatening clouds.  The sky cleared, but then snowflakes started
falling out of a clear sky.  This lasted for over an hour.  Although
there weren't many, I couldn't open until they stopped.
The telescope was reopened at 19:05 MST.  Louisa Rebull observed for
UC01 with the Echelle.
2nd half observing specialist: McMillan
Second half was clear and cold, with the humidity high enough to frost
the cloud camera but not so high as to endanger the telescope.  The
echelle was in use and behaved well, although there was a systematic
guiding effect most noticeable when the telescope was near the
meridian.  It may be necessary to work some more on the tertiary
tip/tilts for the echelle to improve guiding.  Spicam was used once
more for field identification, which worked very well.
* Late in the morning, one of the enclosure motors began to make a
strange noise while tracking, which became a nasty-sounding rattle
during a slew.  Fortunately, that slew was to the last object of the
night; we continued observing since the enclosure was tracking well,
but this noise should be tracked down immediately.
                            OBSERVER COMMENTS
                                FOCUS LOG
                             DECEMBER 19 1999
						 Wind
Time   Inst        Focus     Az  El   #Temp    Dir  MPH  filt  FWHM "
19:25  Echelle  100(-155)   188  35 -6.1/-4.1   75   21  ND 2   2.2
20:10  Echelle  -50(-340)   201  30 -6.2/-5.5   66   22  clear  2.0
20:25  Echelle  -75(-374)   205  29 -6.2/-5.9   63   19  clear  2.2
21:45  Echelle  +20(-394)   137  42 -6.5/-6.7   73   16  clear  2.2
00:50  Echelle  120(-409)   173  64 -6.2/-7.3  263    6  clear  1.0
02:30  Echelle   80(    )   221  57 -5.8/-6.6  263    7  clear  1.5
#First temp is air, second temp is telescope.
                                 WEATHER
                             DECEMBER 19 1999
                               Wind
     Time   Temp F Dewp F  MPH  Direction    Dust      Sky      Precip.
     16:01    28     6      0   265  (W)      235     cirrus     none
     17:01    25    14     10    71  (ENE)    325    ptly cldy   none
     18:01    22    14     13    84  (E)      918    ptly cldy  flurries
     19:01    21    14     23    66  (ENE)   1215     clear      none
     20:01    21    13     18    73  (ENE)    825     clear      none
     21:01    21    11     16    73  (ENE)   2173     clear      none
     22:01    20    11     15    79  (ENE)   2052     clear      none
     23:01    20    10     13    79  (ENE)    865     clear      none
     00:01    21     9      6    87  (E)      353     clear      none
     01:01    21     8      3   260  (W)      277     clear      none
     02:01    22     8      6   262  (W)      286     clear      none
     03:01    21     9      8   259  (W)      269     clear      none
     04:01    20    11      8   267  (W)      286     clear      none
     05:01    19    11      5   265  (W)      242     clear      none
     06:01    18    11      6   264  (W)      272     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: 2.55b5.
Current guide software version: GIm Ctrlv3.0b27.
- Karen Loomis, Russet McMillan