Three new ASCA SIS Calibration Datasets available via the HEASARC Caldb

["IAN M GEORGE, MAIL CODE 660.2, NASA/GSFC, USA" <GEORGE@LHEAVX.GSFC.NASA.GOV>]

Three new ASCA SIS calibration datasets are now available in the HEASARC 
Calibration Database (ie via anonymous ftp from legacy.gsfc.nasa.gov).
The new datasets are all located in the pre-existing directory:

	/caldb/data/asca/sis/bcf

and consist of the following files:
 sisph2pi_290296.fits	
	- which contains updated coeffs describing the position, time & 
	  non-uniformity dependences for the detector CTI.
	- The 1st extension in this file SUPERCEDES that in the pre-existing 
	  file sisph2pi_140795.fits (and the latter flagged as bad in CIFs). 
	  The 2nd extension is new.
 sisechos_290296.fits
	- a new file providing an approximate detector echo history
 sisrddis_290296.fits
	- a new file providing an approximate RDD history

Further information concerning these files and their use will be 
distributed to GOs by the ASCA GOF. 

Ian M George
HEASARC