Date: Sun, 26 Jul 2009 11:35:28 -0000 (UTC)
Subject: 3.5m Night Log 20090725
From: "Gabrelle Saurage"
                        Apache Point Observatory
                        3.5m Telescope Night Log
                        Saturday, July 25, 2009
                                                           ACTUAL
 ASTRONOMER      OBSERVER(S)             INSTRUMENT     START  FINISH
 ------------------------------------------------------------------
 C.Wu            C.Wu                    DIS            22:20  01:05
 S.Morgan        S.Morgan                DIS            01:06  05:35
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 ----------------------------------------------------------------------
 NM03/O     21:07  01:05    0    0    0    0   2.6  1.4   0    0    0
 JH04/R     01:05  05:13    0    0    0    0   4.1   0    0    0    0
 note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: G.Saurage
Partly cloudy skies on and off first half, clearing somewhat second.
When it was cloudy we investigated some issues with some DIS spectra getting
partially cut off at different rotator angles. This has happened on previous runs
with this program. It seems to be worse with slit wheel A which was a special set up
for first half. So far it also seems to be centered around -35 degrees mount.
Detailed email sent out to appropriate parties.
I switched back to the standard slit wheel for second half and saw a few examples of
the same cutting off but at different rotator angles (at -1 and -2 degrees), but I
would like to test this further before drawing a conclusion.
                       ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
               ---------------- FOCUS LOG ---------------
 Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
 --------------------------------------------------------------------------
 21:04 dis-slit   323(  980) 200  64  19.9 21.5 20.2 20.2 20.2     1.41
                ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     16:00    68    48      1   231   (SW)   1641  ptly cldy   none
     17:00    67    48      8    62  (ENE)   1913  ptly cldy   none
     18:00    75    48      9   245  (WSW)   1519  ptly cldy   none
     19:00    73    45      9   245  (WSW)   1210  ptly cldy   none
     20:00    67    44      5   257  (WSW)   1079  ptly cldy   none
     21:00    68    42      5   256  (WSW)   1078  ptly cldy   none
     22:00    67    44      8   183    (S)   1293  ptly cldy   none
     23:00    67    43     13   182    (S)   1663  ptly cldy   none
     00:00    65    42     13   168  (SSE)   1631  ptly cldy   none
     01:00    63    41     10   138   (SE)   2510  ptly cldy   none
     02:00    64    40      9   184    (S)   2329 mstly clr    none
     03:00    63    40      6   148  (SSE)   2452 mstly clr    none
     04:00    63    39      1   217   (SW)   2304 mstly clr    none
     05:00    60    41     14    74  (ENE)   2099 mstly clr    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: 2.10.0
      Current TUI version: TUI 1.6