Summary of DSRI JEM-X Monday Meeting: 26th April 2004
	
Instrument Status
	- Basically still good for flight models
	- SB showed results of tests on labl model (original FM-1): successive
		switch ons start at higher gain and show less and less decay.
		FS has been aged by being irradiated, possibly accelerated
		by relatively high lab temperatures. Switching off returns
		instrument to pristine state temporarily, but whole-mission
		aging occurs in just a few hours after switch on. Confirms what
		we've seen with JEM-X2 re-activation.
		Lab model has sharper 22KeV lines than JEM-X1. Gain falls as
		an area is strongly illuminated with Cd source - suggests our
		calibration method may have an inherent weakness.
	- NL worried that relative positions of Xe (low intensity illumination)
		and calibration sources peaks (high intensity) are changing with
		time, so position of Xe peak determined from -COR data must
		be investigated
	- Charging dependent gain problem (CR interactions) could be complicated
		by no local charging caused by grazing incidence cosmic rays
	- JC showed  Xe line analysis in JEM-X1:
		14-18 April long observation. Comparison of RAW, SPAG-corrected 
		and SPAG+anode-corrected detector spectra. Only SPAG corrections
		significantly sharpen peak, showing these are still viable
		corrections and JEM-X1 not harmed by its long rest.
	- Current gain correction technique should be verified by full scale
		Xe line analysis covering all periods of mission
NL: ISWT
	-IBIS has `snakes' in spectra due to silver-doped glue absorption and
		strong K-edge near Cd peak. Each pixel has its own glue blob
		size and silver fluorescence is modulated by mask patter so 
		that Cd photons get counted as source photons - but they're
		working on it.
	-SPI worried about limited telemetry because CR rate will be increasing
		as solar activity decreases, so expect limit to be reached
		in a few months. Comparing SPI background with Oulu neutron
		monitor information, NL suggestions the background is increasing
		faster than CR flux and instrument is becoming more radioactive.
	- Core Program: pressure on gal. centre observations from CP and 
		Russians so other observers aren't getting a chance to look in
		that region, so in future GC obs. in CP and Russian time will
		be more limited. New working group to look into CP future
		interests
SDAST meeting:
	- Imaging and spectral extraction software needs a lot of work. Tim
		Oosterbroek from ESTEC will attend meeting for spectral
		extraction purposes. Nicolas Produit from ISDC will attend since
		he has experience with Pixel Illumination Methods (PIFs) for
		IBIS. Two extra days after meeting to discuss just these
		subjects. Paul Connell wants more detailed description of
		JEM-X instruments.