If you don't have any HRC-I BKGRND files here, and you want them, you
can download the latest versions from the CXC CALDB download page at
http://cxc.harvard.edu/ciao/download/caldb.html

See the file called hrc_bkgrnd_<version>.tar.gz in Table 1. Download this from
the ftp site by clicking on the filename, into your $CALDB directory
(i.e. where your data, docs, and software directories are in this tree.)
"gtar xvfz" that file from that location, and the individual files will
appear here.

DE Graessle, CXC CALDB manager
2010-06-09