Date: Tue, 20 Apr 2004 06:07:33 -0600 (MDT)
From: Jack Dembicky
Subject: 3.5m Night Log 20040419
                          Apache Point Observatory
                          3.5m Telescope Night Log
                           Monday, April 19, 2004
                                                            ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START FINISH
 --------------------------------------------------------------------
 C.Churchill    C.Churchill, B.Lawton   DIS            19:30  05:55
  INST        SCHEDULED      WEATH     EQUIP     OBS     DAY  NOT USED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 NM05/O      20:33  05:31   0    0    0    0   9.0   0    0    0    0
  note: scheduled times listed include instrument change time
                 ------------- ACTIVITY LOG --------------
 Observing Specialist: J.Dembicky
 We opened around 20:35, shortly thereafter the dust started to rise just
 after I got the main instrument focused.  I reversed the airflow with the
 ventalation fans, and of course the focus moved rapidly which caused a
 little more time than usual to get the telescope focused.
 Dust counts remained relatively high, but no spikes so we remained open.
 Seeing improved after midnight, I adjusted focus on the fly using the
 guider.
                          ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEGDFVO)    TI/SHU   START  FINISH  DESCRIPTION
 -----------------------------------------------------------------------
                 ---------------- FOCUS LOG ---------------
                                         Air/Truss   Wind
 Time   Instrument   Focus     Az  El    Temp-C    Dir MPH  filt  FWHM
 ---------------------------------------------------------------------
 20:41  DISslit       0(1211) 222  59    8.4/9.4   269  24  none  1.49
 20:42  NA2gdr   -4639(42360) 223  58    8.2/9.3   265  21    R   1.73
                ------------- WEATHER LOG ----------------
                                  Wind                       Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
     ------------------------------------------------------------------
     16:01    52     9     24   236  (SW)    1478  Pt. Cldy    none
     17:01    55     9     17   240  (WSW)   1670  Pt. Cldy    none
     18:01    53     2     24   260  (W)     2392    Clear     none
     19:01    50     4     16   254  (WSW)   1748    Clear     none
     20:01    46     3     17   246  (WSW)   1834    Clear     none
     21:01    47    -2     19   267  (W)     2959    Clear     none
     22:01    47    -1     22   272  (W)     3177    Clear     none
     23:01    46     4     20   266  (W)     2133    Clear     none
     00:01    45     6     25   277  (W)     2155    Clear     none
     01:01    43     7     22   272  (W)     2280    Clear     none
     02:01    43     5     28   273  (W)     2398    Clear     none
     03:01    42     1     25   293  (WNW)   2111    Clear     none
     04:01    41     5     23   284  (WNW)   2026    Clear     none
     05:01    39     6     19   288  (WNW)   2273    Clear     none
     06:01    38     6     18   291  (WNW)   2630    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-0.842