Subject: 3.5m Night Log 20080129
Date: Wed, 30 Jan 2008 08:41:54 -0700 (MST)
From: bketzeba@apo.nmsu.edu (Bill Ketzeback)
                        Apache Point Observatory
                        3.5m Telescope Night Log
                        Tuesday, January 29, 2008
                                                         ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT    START  FINISH
 -------------------------------------------------------------------
 T.Heckman      R.Overzier              DIS           17:00  00:06
 S.Anderson     S.Anderson              SPIcam        00:20  06:30
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 JH06/R     18:28  00:10    0    0    0    0   5.7   0    0    0    0
 UW07/R     00:10  06:04    0    0    0    0   0.6  5.3   0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: B.Ketzeback
 Nice photometric night.
 During afternoon checkout I noticed that the pressure on the echelle
 transfer dewar was unusually high and above what I recalled the
 pressure relief set points to be. I bled some of the pressure off
 manually. At midnight when I did the instrument change I checked
 the pressure again and it was still elevated and I could hear one
 of the relief valves at the camera bleeding pressure. The volume
 in the tank also had dropped from about 3/4 in the afternoon to
 1/2 at midnight. I again manually bleed some pressure. This
 morning I found that the pressure in the dewar was again around
 10psi and the tank was empty ( 1u per 0.1 cubic feet.
                              TELESCOPE STATUS
      Telescope drives operational. Current TCC version: 2.9.1
      Current TUI version: TUI 1.4.4