Date: Sat, 27 Jun 1998 06:14:22 -0600 (MDT)
From: Tia Hoyes
Subject: 3.5m oblog 980626
                         FRIDAY   JUNE  26, 1998
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                    ACTUAL
ASTRONOMER       OBSERVER          INSTRUMENT   DATE   START FINISH
Strauss          Strauss/Fan           DIS      6/26   19:30 00:58
Zucker           Zucker              SPICAM     6/26   01:15 05:50
 INST        SCHEDULED      OBS      WEATH     EQUIP   DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
PU05/R     21:57 01:10   2.8  0.4   0    0    0    0    0    0    0
UW06/R     01:10 04:16   3.1   0    0    0    0    0    0    0    0
(note: times listed include instrument change time)
                               ACTIVITY LOG
The telescope was open tonight at 20:00. Xiaohui Fan and Michael Strauss
were observing for the first half of the night.
Comments:A beautiful half-night: great weather, and everything worked
flawlessly.
Many thanks to Tia for her usual efficient help.  We should also mention
the superb pointing: we were observing objects from the SDSS first-light
data, and 3/5 of them fell completely within the 1.5" slit, while the
other two were no more than 2" off.  This is due both to the pointing of
the telescope, and the superb astrometric solutions for these data!
                        -Michael
Dan Zucker was available for the second half of the evening.
Comments:We had a productive night, although the initial promise of ~1 arcsec
seeing degenerated to about 1.5 arcsec early on. Minor errors in the
tracking rate manifested themselves as elongated stars in 5 min
unguided exposures, and we lost about 35 min to a period of serious
tracking errors (at first we thought the guider was just misbehaving).
I hope the tracking gets better after the shutdown...
When the tracking was not going crazy, the guider worked wonderfully,
yielding images with nice round stars.
The data transfer rate between APO and UW is painfully slow -- tonight
each image took from 70 to 120 sec to ftp.
(* means a trouble report has been issued or appended to)
                               FOCUS LOG
                             JUNE  26, 1998
                Best     Telescope               Wind                 Seeing
Time   Inst     Focus     Az    El   Temp#      Dir  MPH     filter   FWHM "
20:50  DIS   -300(6744) 82.1  67.3  20.2/23.69 243.0 12.9      IN     1.40
22:15  DIS   -400(6625)162.6  56.1  20.1/21.42 251.7  9.3      IN     1.12
01:15 SPICAM -380(6480)184.7  57.7  18.8/19.38 281.4  5.2      V      0.97
03:30 SPICAM -300(6568) 36.2  47.1  18.9/18.54 356.3  4.3      V      1.01
# The first temp is air, the second is truss, both in degrees C.
                                 WEATHER
                               JUNE  26,  1998
                                 Wind
    Time   Temp F Dewp.   MPH.    Dir.       DUST     Sky         Precip.
     16:01    82    24     23   241  (WSW)    373    clear         none
     17:01    79    20     12   260  (W)      346    clear         none
     18:01    77    18     12   274  (W)      285    clear         none
     19:01    74    20      5   267  (W)      287    clear         none
     20:01    72    21     11   266  (W)      288    clear         none
     21:01    68    24     13   239  (WSW)    373    clear         none
     22:01    69    24     11   227  (SW)     338    clear         none
     23:01    68    24      8   261  (W)      316    clear         none
     00:01    68    23     11   267  (W)      391    clear         none
     01:01    67    22      4   270  (W)      466    clear         none
     02:01    66    19      3   268  (W)      488    clear         none
     03:01    66    18      6   303  (WNW)    391    clear         none
     04:01    65    16      3     5  (N)      414    clear         none
     05:01    65    14      5    12  (NNE)    341    clear         none
     06:01    63    13     11    19  (NNE)    336    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: 2.41a
Current guide software version:GIm Ctrl v3.0b 15.out
-Tia