SDAST Monday Meeting #133: 21st March 2007
	
	
	Instrument Status: No particular news. Rev.54 JEM-X2 reactivated in
		preparation for Crab Calibration. No hotspots. Interesting
		gain stablization of JEM-X2 where initially positive and
		negative gain decays cancel out.
	Crab Calibration: SB looked at grey filter values and calculated
		Crab flux and results look good. Also SB seen clear negative
		linear correlation between number of double triggers and
		Vc setting: low Vc gives high double trigger rate. 5 mu sec.
		deadtime has to be added for each double trigger. Strong
		variation in double trigger rate with changing which anode
		segments are active. Highest rate with all segments active,
		lowest with only one active segment. Lower detector area
		gives lower probablity of seeing complete particle track.
	SDAST meeting: Install "pdf" as printer to get .ppt presentations into
		document format. Official documents to be archived in cDMS 
		should be in pdf format.
	ISWT: Wed/Thurs next week. Subjects to be discussed:
		SPI radiation environment; INTEGRAL workshop #7; Dead anodes;
		Extremely bright transients (PK), off-axis pointings, anode
		segment deactivation, trigger disable etc; preparations for
		Mission Extended Operations Review (MEOR).
	Science Results: JC finished mixed burning paper, delivered to A and A.
		JC also seen burst from GRS1741.2853, close to galactic centre.
		However, this burst contaminated light curve of neighbouring
		source 1A 1742-289. In image can clearly see only one of the
		sources flares up, but OSA source extraction (SL's software)
		can't distinguish between the two.
	
	
CAO 16/4/2007