To:sot_shift
from: Dan Schwartz
date: 17 Aug 99, 06:00am EDT
Subject: SOT shift report, Shift L26
--------
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Aug_17_1999_L26.txt.

Shift L26
	Start at 229:10:00  GMT
		 = 06:00am 13 Aug EDT
	End	   02:00pm 14 Aug
   
SOT Lead	DAS
Spac/Aspect	RAC
FOT/Sci liason	
HRC		
ACIS 		PPP,MB

(Times will be given in GMT on day 229. In general
times are rough, not precise.)

PLAN
Finish RXJ003033.2+261819 distant cluster observation


EVENTS
Using OBSID 1226.
Manuever to RXJ at 10:00. Acquire 3 stars, 2 fids.

17:09  brief CAPs 286, 290 for ACIS bias measurement, and HRC HV
	on antico shield & HRC-I.

AOS at 18:17

NOTES/ISSUES/PROBLEMS
The 2 stars NOT acquired had magnitudes of 10.2, 10.1 and it
seems the camera often does not track such stars. Rob C will 
plan an observation where a fainter than 10th mag star will 
be turned into a monitor, instead of guide, star, so that we
will get pixel data to help diagnose this situation. Actually, a
series of "experiments" are planned which also toggle the convert
to track function and adjust the faint magnitude threshold to 
minimum, and adjust the exposure time. These are all build into the
next daily load.

The Fid light not acquired had its current turned off as a relic
of the M7 observation. This is because the same fid light set was
used in the next load, so the OFLS did not cycle the fid light 
controller.

It has been arranged that there will be a SSR playback at 230:02:00
to playback the high priority ACIS-S plate focus data, with a 
request for expedited delivery from Madrid, and an expectation of
delivery to CXCDS at 05:00GMT = 1am EDT.

We hear that "there will be a stand-up meeting at 9:00am
every day in the action room. The purpose will be to go over spacecraft
status."

Vacuum monitor at 4 10^-6 torr.
-------------------------------------------------------
Dan Schwartz,	MS #3
das@head-cfa.harvard.edu  
phone: (617)495-7232    FAX:   (617)495-7356
cell phone: (617)512-5627   
pager: 800-759-8352 PIN 1636502
       or e-mail 1636502@skytel.com 
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