| XMAIN: | Directory containing the software. |
| XACAL: | Directory containing the
background models, the Galactic column density data from Marshall
& Clark (1984) and the collimator response data. |
| XADMX: | Directory containing the
response matrices. |
| XAOBS: | Directory containing the
catalogue files for all the existing FRFs. Files containing
information regarding events detected by the HXRBS on board SMM
are also stored on this directory. |
