To:sot_shift
from: Dan Schwartz
date: 04 Nov 99 , 12:00noon EST
Subject: SOT shift report, Shift L104
--------
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Nov_04_1999_L104.txt.

Shift L104. 
	Start at 308:13:00  GMT
		 = 08:00am    04 Nov EST
	End	   12:00 noon 04 Nov
   
SOT Lead	DAS
Spac/Aspect	
FOT/Sci liason	
HRC		
ACIS 		

(Times will be given in GMT on day 308. In general
times are rough, not precise.)

PLAN
Continue running under load p24c. Perform 2 Ksec OBSID 397 of
NGC 4203 imaging on ACIS-S, then 4 Coma cluster observations
imaging on ACIS-I.

EVENTS
Status at LOS, 308:10:59, was as follows:
       PCAD MODE              =       NPNT
       CONTROL LAW FLAG       =       NPNT
       Stars:                 =          5 
       FIDS                   =          3
       RA                     =    194.939 deg
       DEC                    =     27.945 deg
       ROLL                   =     31.396 deg
       Format                 =          2
       OBSID                  =        556

       SIM FA                 =       -467
       SIM TSC                =      74336 (ACIS-S)
       HETG                   =        OUT (81.0 deg)
       LETG                   =        OUT (79.5 deg)
        HRC-S HV is ON
        EPHIN:         A-Leak =   0.2040 mu-a
                       B-Leak =   0.0320 mu-a  

Next Comm expected 19:30 to 20:15


NOTES/ISSUES/PROBLEMS
Quick look data notes:
	Imaging observations of Pictor A (OBSID 345) and HYDRA A
(OBSIDs 575 on ACIS-I and 576 on ACIS-S) look okay. Hydra A clearly
shows the enhanced response of the BI chip S3 where the image 
overlaps to the adjoining front illuminated chip. Capella, OBSID
1420, HRC-S/LETG shows a clear dispersed spectrum, with a 
"streak" across the entire detector, perpendicular to the 
dispersion at zero order. ?. Sirius OBSID 1459, from day 300,
continues NOT to show a dispersed spectrum -- this may be because
the quick look image we get does not show the 2 outer HRC-S
MCPs which contain the low energy spectrum. 



Notes from the 9am status meeting:
The ONLS/OFLS system was down for about an hour to perform 
a Database/Amass backup. Is back up now.
P25 load needs to be rebuilt -- grating operations did not 
schedule as needed due to continuity checking conflicting with 
the FOT request. Products due out at noon, expect review telecon
at 5pm (EST) today. Last upload opportunity will be at 12:40
(GMT) on Saturday.
We flowed over to solid state recorder B due to (marginally) large 
error count in download. We now face losing ~1.5 minutes of
data during the manual changeover from tape recorder B back
to A. In summary, this calls for more careful consideration
of our procedures to reset the pointers, and probably a 
more complicated proceedure which depends on the current
state of the recorders and the times until the next expected
passes.

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