To:sot_shift
from: Dan Schwartz
date: 5 Sep 99, 04:00am EDT
Subject: SOT shift report, Shift H45
--------
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Sep_04_1999_H45.txt.

Shift H45.
	Start at 248:02:00  GMT
		 = 10:00pm 05 Sep EDT
	End	   04:00am 06 Sep
   
SOT Lead	DAS
Spac/Aspect	
FOT/Sci liason	
HRC		SSM,JHC,GM,MJ,
ACIS 		

(Times will be given in GMT on day 248. In general
times are rough, not precise.)

PLAN
Run under load P11
Finish HRC-S focus plates measurements.
Continue running ACIS event histograms

EVENTS
Start shift in comm. Running OBSID 62436, format 1. Pointing at 
LMC X-1, 5 stars and 3 fid lights.
02:14  Move HRC-S focus to -699.
02:33  Move HRC-S focus to -867
02:50  Move HRC-S focus to -950
03:08  Move HRC-S focus to -1034
03:27  Move HRC-S focus to -1201
03:46  Move HRC-S focus to -1368

On HRC EGSE, best focus looks between -950 and -1034 steps.
-950 is probably slightly in front of focus, and this is 
a better place to be for overall field performance.

04:04	Move HRC-S focus to -950. This will be the position for
the remainder of HRC-S observations in P11.

04:15  LOS.  next comm planned for GMT 10:30 (6:30am EDT).

NOTES/ISSUES/PROBLEMS
The SOT lead should take a look at the tlmCmd window on the ACIS machine,
to verify that the event histograms are running.  You should see
dataTeEvHist scrolling up, i.e., if we are in comm.
Call Paul Plucinsky if this isn't happening.

HRC has moved to the best estimate of focus based on looking at 
the LMC X-1 image size in real time on the EGSE. This is at
-950 motor steps.  A CAP 352A should be executed to offset for the LETG
measurements (we hear they want to be 100 microns in front 
of focus, ie at algebraically larger motor steps).
Then, before moving back to ACIS-I observation of Eta Carinae, OBSID
50, after the radiation belt passage ending 249L20:33,we must
run CAP 352A to return to the best ACIS-I focus position, -536
motor steps.

Note that the single OBSID, 62436, contains all the HRC-S data
from eight  different focus positions during the time 248:01:23
to 04:15, plus a return to -950 motor steps at 04:04.


-------------------------------------------------------
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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