Date: Fri, 14 Apr 2000 06:59:55 -0600 (MDT)
From: Frank Deglman
Subject: 3.5m Night Log 20000413
                        Thursday, April 13, 2000
                        APACHE POINT OBSERVATORY
                              Observing Log
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)   INSTRUMENT       DATE    START  FINISH
--------------------------------------------------------------------
B.Gillespie     F.Deglman     S/H, Guider     4/10-11  20:55  06:15
                C.Hastings
                J.Davis
                J.Morgan
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
--------------------------------------------------------------------
EN01/S     20:28  05:39   0    0    0    0   1.2  8.0   0    0    0
(note: times listed include instrument change time)
                      -------- ACTIVITY LOG --------
1st Half Observing Specialist: Frank Deglman, Camron Hastings
     Jon Davis and Jeff Morgan completed the installation of the
secondary and testing of the recent renovations. Frank and I opened and
cooled at 20:55. We started testing collimation, among other things,
using the Shack-Hartmman and then proceeded to do pointing models.
2nd Half Observing Specialist: Frank Deglman
The Shack-Hartmann's orientation on the TR1 port was determined by holding
a piece of foam over a given part of the primary and noting where this
corresponded to in an S-H frame.  The device was then rotated CCW 45
degrees so as to have the front of the scope at bottom (and NA2 to the
right).  Next the tilt of the secondary was adjusted.  The Shack-Hartmann
data initially indicated that coma has been virtually eliminated (at 40-50
degrees elevation at least).  Airflow testing seems to show that both the
primary and the tertiary exhibit high-frequency oscillations.
The IDL guider monitor had problems in that the DIMM laptop was set to the
wrong time, roughly one half hour behind reality.  The time axis on the
DIMM plot was just over three hours fast.
An initial pointing model of 32 points was attempted.  Had problems with
some of the stars were saturating with the red and the red+ND2 filters.
Switched to red+ND3.  This gave on the order of a few hundred to several
thousand counts for peak values.  Ran into pointing model problems with
version 2.2.6. and so used 2.2.5.  Next had problems with the NA2 rotator.
It would quit at -270 when it should have gone to -360.  This caused
skipping a few points in the model until Craig fixed the problem.  27
points were gotten.  Later, a more complete 100-point model was run
without incident.
Did an altitude sweep with the S-H device and steadily decreasing the
elevation.  Repeated two points near zenith with a reproducibility of
within 5 arcseconds.  As sky brightened, went to brighter stars with
shorter exposure times.  Had to quit because of morning twilight bringing
the background up too high.  Closed dome at 06:15.
                            OBSERVER COMMENTS
                                FOCUS LOG
                              April 13 2000
                                                  Wind
Time   Inst        Focus     Az  El   Temp*    Dir  MPH  filt   FWHM"
-----------------------------------------------------------------------
	S-H	  +70           ~45
*First temp is air, second temp is telescope superstructure.
                                 WEATHER
                              April 13 2000
                           Wind  Wind
     Time   Temp F Dewp F  MPH   Direction    Dust      Sky      Precip.
     -------------------------------------------------------------------
     17:01    57    16     13   271  (W)      896      clear      none
     18:01    56    15     14   271  (W)      971      clear      none
     19:01    53    15      9   269  (W)     1104      clear      none
     20:01    47    15      9   233  (SW)    1070      clear      none
     21:01    49    14     11   222  (SW)    1059      clear      none
     22:01    49     9     11   186  (S)     1145      clear      none
     23:01    48     8     10   198  (SSW)   1051      clear      none
     00:01    49     8      6   206  (SSW)   1068      clear      none
     01:01    49    11      9   264  (W)     1026      clear      none
     02:01    48     9      9   215  (SW)    1074      clear      none
     03:01    50    11     11   224  (SW)    1221      clear      none
     04:01    50     9     11   240  (WSW)   1173      clear      none
     05:01    48     9     11   198  (SSW)   1471      clear      none
     06:01    48     6     15   217  (SW)    1343      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
> 1 micron per 0.1 cu. ft.
                              TELESCOPE STATUS
     ----------------------------------------------------------------
     Primary, secondary, and tertiary mirrors in place and collimated.
     Primary support system operational.  Mirror ventilation system in
     place.  Telescope drives operational.  Current Remark version:
     2.55b5. Current guide software version: GIm Ctrlv3.0b27.  Current
     TCC version is 2.2.2.
                                   - Frank, Camron