Date: Tue, 19 Jun 2007 11:16:53 -0000 (UTC)
Subject: 3.5m Night Log 20070618
From: "Gabrelle Saurage"
                         Apache Point Observatory
                         3.5m Telescope Night Log
                          Monday, June 18, 2007
                                                           ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT      START  FINISH
 -------------------------------------------------------------------
 T.Murphy       R.McMillan              Apollo          20:05 21:33
 M.Strauss      M.Stauss,E.Aubourg      DIS             21:36 04:55
  INST     SCHED(TWILIGHT)   WEATH     EQUIP     OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 UW16/O     20:23  21:32    0    0    0    0    0   0.8  0.39   0    0
 PU08/R     21:32  04:51    0    0   0.6   0   4.8  1.5   0    0    0
   note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
Observing Specialists: G.Saurage, J.Davenport
Echelle ThAr lamp looks normal. Thanks to day staff for replacing bulb.
AZ Velocity Scales:
Checkout – 578.4, 582.6, Avg 580.5
Midnight – 570.9, 573.8, Avg 572.4
Morning – 572.8, 576.3, Avg 574.6
Apollo reported good signal tonight.
Images were beginning to look very asymmetric in the Alt direction during
second half. It didn’t seem to be tracking or guiding poorly, but the
effect seemed accentuated towards the end of the night.
We tried adjusting the Az velocity scale values after doing a velocity
scale measurement in the morning but may have at the same time messed up
the current values in the init file. So we had to revert to a previous
version of the file just to clear a Motor 2 overcurrent in the Az drive
(Thanks for the help Mark!).
After the last science integration of the night we ran the velocity scales
again for both axes:
Az – 577.9, 580.0, Avg 578.9
Alt - -629.3, -632.9, Avg -631.1
                       ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
  PU08    D         T/S       03:45  04:25   Az motor 2 overcurrent
               ---------------- FOCUS LOG ---------------
Time  Instrument  Focus    Az  El  Temp Strc Prim  Sec  Air  filt FWHM
 -----------------------------------------------------------------
21:40 DISslit     45(575)-108  76  18.9 19.3 18.4  19.1 18.8  --  1.0
21:40 DISslit    -63(436) -74  46  18.1 17.5 17.0  17.6 17.8  --  1.5
                ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     16:00    71    22     14   301  (WNW)    408    clear     none
     17:00    72    24      7   266    (W)    384    clear     none
     18:00    72    24      1   210  (SSW)    354    clear     none
     19:00    69    20      8   263    (W)    406    clear     none
     20:00    67    20      6   302  (WNW)    348    clear     none
     21:00    66    19      6   296  (WNW)    367    clear     none
     22:00    66    17      3   310   (NW)    377    clear     none
     23:00    66    18      4   288  (WNW)    337    clear     none
     00:00    65    19      4   179    (S)    389    clear     none
     01:00    64    18      1   181    (S)    623    clear     none
     02:00    65    18      3   258  (WSW)    566 mstly clr    none
     03:00    66    18      1   251  (WSW)    510    clear     none
     04:00    66    18      1   228   (SW)    635    clear     none
     05:00    64    18      1   255  (WSW)    734    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 TCC version: 2.9.0
      Current TUI version: TUI 1.3