From: "Noel Camron Hastings"
Subject: 3.5m Night Log 20010422
Date: Mon, 23 Apr 2001 05:31:26 -0600
                        APACHE POINT OBSERVATORY
                        3.5m Telescope Night Log
                        Sunday, April 22nd, 2001
                                                          ACTUAL
 ASTRONOMER    OBSERVER(S)             INSTRUMENT      START  FINISH
 --------------------------------------------------------------------
 M.Strauss     X.Fan, M.Strauss        DIS-Low         18:54  21:13
                                                       21:47  05:32
   INST        SCHEDULED     WEATH     EQUIP     OBS     DAY  NOTUSED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 PU02/R      20:35 05:28    0    0   1.0   0   7.9   0    0    0    0
  note: scheduled times listed include instrument change time
                 ------------- ACTIVITY LOG --------------
 Observing Specialist: Noel Camron Hastings
     High winds greeted us this evening, but not quite high enough to
remain closed. The weather has turned suddenly very cold again. We opened
at 19:44 MDT to begin cooling.
     There was a loss of an hour total (including the image that was
lost) due to the red chip starting to warm on DIS. Evidently the ln2 fill
hose had not been put back on properly after my afternoon checkout. I
removed it, reattached it and started a fill and it worked normally. A
few biases removed any residual charge and we were back on the sky again
in about 30 minutes after discovery.
     The rest of the night went very smoothly and the Princeton team
obtained some very *interesting* data.
         --------------- INSTRUMENT FOCUS LOG ----------------
                                       Air/Truss   Wind
 Time   Instrument   Focus     Az El    Temp-C    Dir MPH  filt   FWHM"
 ----------------------------------------------------------------------
 20:15  DIS Slit   +70(765)   209 53  +3.0/+3.5   319  15  none   1.45"
 20:24  NA2 Gdr   -355(762)   213 52  +2.6/+3.3   314  14   R     1.12"
 00:51  DIS Slit   +50(659)   252 34  -0.8/-0.5    10  13  none   2.14"
 00:54  NA2 Gdr   1000(664)   254 32  -0.9/-0.7   348  23  none   1.96"
              ------------- WEATHER CONDITIONS ------------
                                 Wind                        Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:01    39    13     16   306  (NW)    5752  ptly cldy    none
     17:01    39    13     18   287  (WNW)    934  ptly cldy    none
     18:01    44     9     22   286  (WNW)   1912  ptly cldy    none
     19:01    41     4     15   271  (W)      750  ptly cldy    none
     20:01    37    11     10   284  (WNW)    742  ptly cldy    none
     21:01    35    15     12     5  (N)      296  ptly cldy    none
     22:01    34    16      3     0  (N)      256   cloudy      none
     23:01    33    18     17   348  (NNW)    305  ptly cldy    none
     00:01    32    19      9    12  (NNE)    350  ptly cldy    none
     01:01    31    20     19   354  (N)      339    clear      none
     02:01    31    20      7    19  (NNE)    332    clear      none
     03:01    31    20     15   357  (N)      368    clear      none
     04:01    31    18     23    11  (N)      331    clear      none
     05:01    31    18     25    28  (NNE)    389    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 Ctrlv3.0b27. Current TCC version: 2.5.1
  Current MC version: v1_7_3.