BeppoSAX Data Archive :
The calibration data
Responses and Arfs
The latest responses were released on Sep 1997.
There is one rmf for each of the Narrow field instruments, e.g.
LECS, MECS1, MECS2, MECS3, HPGSPC and PDS.
The arfs for the MECSs and LECS instruments are provided for different
The MECS arfs have been generated for the single units
(MECS1 MECS2 and MECS3), for the three units combined (MECS)
and for the MECS2 and MECS3 combined (MECS23).
The arfs for the three or two combined MECS units should be used
with the MECS1 rmf, and are appropriated to spectra extracted
from an event file where the MECS units are combined
(either 1,2,3 or 2,3).
Offaxis matrices (Release date Feb 1999) for the MECS
are available for 6 14 and 20 arcmins offaxis
for an extraction radius of 3 arcmins.
At HEASARC, the latest responses are available via ftp in the directory
sax/cal/responses/98_11 . An update for the LECS responses for
strong sources is in the directory
Background files, spectra and events, obtained from blank-sky
observations are available for the LECS and MECS.
For the MECS the background spectra and events files are provided
for the single units or for the combined units.
The background event files were accumulated during blank-sky observations
but also during the dark earth observations. The latter are a
good approximation of the instrumental background.
At HEASARC, the latest background spectral files and background events files
are available via ftp in the directory in the
sax/cal/bgd/98_11 . An update for the LECS background file
is availble in the directory
Basic calibration data
The Basic calibration files are necessary when processing the data
with the SAXDAS software package.
The basic calibration files are provided either as
tar files one
for each instrument to be installed with the software or
unique tar file to be installed in the CALDB database
The location of all the above calibration files in the HEASARC ftp area
mirrors the data organization of the SAX-SDC ftp area.
However all the above calibration data (responses background and basic files)
have been also ingested in the HEASARC calibration database dedicated to sax
HEASARC FTP area
. A separate document describes the content of the
BeppoSAX CALDB area
) as available at HEASARC.
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