Date: Fri, 21 May 2004 05:49:59 -0600 (MDT)
From: Jack Dembicky
Subject: 3.5m Night Log 20040520
                        Apache Point Observatory
                        3.5m Telescope Night Log
                        Thursday, May 20, 2004
                                                          ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START FINISH
 --------------------------------------------------------------------
 J.Hennawi       J.Hennawi              DIS            19:20  05:30
  INST        SCHEDULED      WEATH     EQUIP     OBS     DAY  NOT USED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 PU01/R      21:00  04:59   0    0    0    0   7.2  0.8   0    0    0
  note: scheduled times listed include instrument change time
                 ------------- ACTIVITY LOG --------------
 Observing Specialist: J.Dembicky
 Skies were clear tonight and I opened when Joe finished his cals.  I
 focused the telescope and seeing was around 1.3 arc sec (not bad
 considering we had not had the enclosure open until it was time to focus.
 Seeing generally was in the 1-1.5 arc sec range until Midnight when the
 wind direction change, temps dropped, and humidiy climbed.  Seeing went
 bad along with it ranging in the 2-4 arc sec range.
 The NA2 guider ICC locked up around 02:00 and needed to be power cycled
 to bring it back to life.  No science time was lost as the observer
 could hand guide as necessary.
 Wind direction changed a little after 03:00 and the seeing improved to
 1-1.5 arc sec.
                          ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEGDFVO)    TI/SHU   START  FINISH  DESCRIPTION
 -----------------------------------------------------------------------
 PU01  NA2guider   I/S        --:--  --:--  NA2 guider ICC locked up.
                                            Power cycled
                 ---------------- FOCUS LOG ---------------
                                         Air/Truss   Wind
 Time   Instrument   Focus     Az  El    Temp-C    Dir MPH  filt  FWHM
 ---------------------------------------------------------------------
 21:11  DISslit    -175(1427)  70  57    15.0/18.7  260  11  none  1.3
 21:17  NA2gdr    -247(46752)  69  59    15.0/18.4  255  11    R   1.1
                ------------- WEATHER LOG ----------------
                                  Wind                       Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
     ------------------------------------------------------------------
     16:01    72    27     17   227  (SW)     702    Clear    none
     17:01    74    30     15   218  (SW)    1000    Clear    none
     18:01    70    26     17   221  (SW)     825    Clear    none
     19:01    66    20     16   245  (WSW)    597    Clear    none
     20:01    60    15      8   228  (SW)     673    Clear    none
     21:01    59    13     12   236  (SW)     677    Clear    none
     22:01    60    13     13   236  (SW)     470    Clear    none
     23:01    60    12      8   262  (W)      396    Clear    none
     00:01    54    32     15   141  (SE)    1021    Clear    none
     01:01    54    35     12   156  (SSE)   1433    Clear    none
     02:01    52    42     14   172  (S)     1559    Clear    none
     03:01    51    42      4   169  (SSE)   1722    Clear    none
     04:01    54    32      6   200  (SSW)   1032    Clear    none
     05:01    53    25     10   265  (W)      780    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
     Telescope drives operational. Current Remark version: 2.85b
     Current guide software version: guider v4.1b4
     Current TCC version: 2.7.2  Current TUI version: TUI-0.843