Date: Sat, 4 Apr 1998 05:06:40 -0700 (MST)
From: Tia Hoyes
Subject: 3.5m obslog 980403
                         FRIDAY   APRIL  3, 1998
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                    ACTUAL
ASTRONOMER   INSTRUMENT   DATE   START FINISH
York            GRIM2     4/03   17:33 20:30
Cooray      GRIM/SPICAM   4/03   20:30 04:50
 INST        SCHEDULED      OBS      WEATH     EQUIP   DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
UC10/R     18:19 19:49    0   1.5   0    0    0    0    0    0    0
UC03/R     19:49 04:23   2.9  6.2   0    0    0    0    0    0    0
(note: times listed include instrument change time)
                               ACTIVITY LOG
The telescope was opened at 16:50.  Gordon Richards and his group were on hand
for the Adler run.  They were using GRIM2 for Gamma Ray burst observations.
Asantha Cooray continue the observations with GRIM2 and then switched to
SPICAM at 00:30.  This was his first time using SPICAM, and I helped him get
started and he seemed to continue on with no problems.
Comments:The first half of the night was spent on the reported radio/optical
transient of the GRB980329 with GRIM II imaging in K-band down to about 22
magnitudes, to put a limit on the transient K-band magnitude.
The data were taken for the U. of Chicago GRB team.
The second half of the night was spent observing a medium redshift galaxy
cluster field with SPICAM to determine the feasibility of conducting a
weak-lensing project of galaxy clusters with SPICAM at APO.
The seeing was around 1.8" (FWHM) for the SPICAM data.
We didnot encounter any problems during the night, except for few extra
time to familiarize with SPICAM operations.
(* means a trouble report has been issued or appended to)
                               FOCUS LOG
                            APRIL  3, 1998
                Best     Telescope             Wind                 Seeing
Time   Inst     Focus     Az   El   Temp#      Dir  MPH     filter   FWHM "
18:40 GRIM2  -150(6276) 139.8 76.4 4.4/6.29  182.1  12.2      K      0.83
22:15 GRIM2     0(6380) 229.0 53.1 4.1/3.56  177.4  14.5      H      1.49
22:21 GRIM2     0(6384) 229.0 53.1 4.3/3.63  172.2  18.8      K      1.28
01:00 SPICAM   50(6268)  19.3 62.4 3.7/3.80  195.3  16.6      R      1.80
# The first temp is air, the second is truss, both in degrees C.
                                 WEATHER
                             APRIL  3,  1998
                                 Wind
    Time   Temp F Dewp.   MPH.    Dir.       DUST     Sky         Precip.
     16:01    48    14     11   209  (SSW)    318    clear         none
     17:01    45    10     14   198  (SSW)    313    clear         none
     18:01    43    11     11   206  (SSW)    369    clear         none
     19:01    39    10      9   188  (S)      336    clear         none
     20:01    39     9     14   183  (S)      383    clear         none
     21:01    38     9     17   168  (SSE)    374    clear         none
     22:01    39     0     16   184  (S)      355    clear         none
     23:01    40     2     23   191  (S)      398    clear         none
     00:01    39     4     19   198  (SSW)    479    clear         none
     01:01    39     7     18   192  (SSW)    411    clear         none
     02:01    39     7     16   187  (S)      335    clear         none
     03:01    39     2     12   209  (SSW)    421    clear         none
     04:01    38     7     16   200  (SSW)    407    clear         none
     05:01    38    11     11   204  (SSW)    547    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: 2.39
Current guide software version:GIm Ctrlv3.0b11.
-Tia