These data are for the MP2 cathode. This cathode has a slightly larger spot size than MP1 and was *NOT* used for the bulk of AXAF calibration. For an explaination of the experiment see MP1 index.
We processed these data using versions 1998-02-26 of HRIFIT and 1998-05-13 of LEXTRCT; we used sumb.gap for de-gapping corrections. The FITS files record these version numbers. Accept nothing less.