Which CALDB version is installed on my system?
The CIAO scripts package contains a tool - check_ciao_caldb - that performs a simple check of the Chandra CALDB installation. Running the tool produces screen output like the following:
unix% check_ciao_caldb CALDB environment variable = /soft/ciao/CALDB which is a link to = /data/CALDB/ciao CALDB version = 4.9.6 release date = 2021-09-21T16:00:00 UTC CALDB query completed successfully.
This information is also stored in the caldb_version.fits file, which is automatically updated each time the CALDB is upgraded on your system. The final row in the file indicates the current version:
unix% dmlist \ $CALDB/docs/chandra/caldb_version/caldb_version.fits"[cols caldb_ver]" \ data,clean | tail -1 4.9.6
In this case, CALDB 4.9.6 is being run. The most recent version of the CALDB may be obtained from the CIAO download page.