The SAS-2 energy bounds matrix file is in the standard energy bounds matrix FITS format for X-ray astronomy (see the document CAL/GEN/92-002). There are 8 energy channels are defined for the SAS-2 detector.
Brenden Perry (HEASARC)
(see CAL/GEN/92-002, available on-line as postscript and html versions).
No information supllied to the CALDB other than that above.