BeppoSAX Data Archive :
Software for archival data
LECS and MECS : clean events
The MECS and LECS clean event files have been
generated running all the relevant stages (I-IV for the MECS and I-III
for the LECS) of
saxpipe , the main SAXDAS script that controls
the pipeline. These files have all the necessary corrections applied and
can be used for scientific analysis. Spectra, ligthcurves and images can
be extracted reading the clean event file into XSELECT (distributed
with FTOOLS) or in any other software capable to manipulate event files.
To create exposure maps or correct the arrival time of the events at
the barycenter, the user needs to also download the housekeeping files
and to install SAXDAS, which includes software to perform such tasks.
Most of the MECS file in the archive are not merged.
A script mgmecs , that uses SAXDAS tasks, is available
to merge the event files from MECS2, MECS3 and/or MECS1.
More informative guidelines of how to use the clean event files
are available in the
Cookbook (ps file).
The ~20 arcsec systematic error (see
An improvement of BeppoSAX LECS and MECS source positioning accuracy" February 2002 )
that affects LECS and MECS can be corrected in the archived event file using the script
saxposcor.
LECS and MECS : raw events
The MECS raw event files and the Housekeeping have been
generated running the stages I & II of saxpipe/mecspipe , the main SAXDAS
script that controls the pipeline. The stage I merged all the events relative
to the pointed position in one file, instead stage II converts the HK values
in physical values, computes the gain and merged the files.
The LECS raw event files and the Housekeeping have been
generated running the stages I of the saxpipe/lecspipe , the main SAXDAS
script that controls the pipeline. The stage I merged all the events
relative to the pointed position in one file, converts the HK values
in physical values, computes the gain and merged the files.
Before using these files for scientific analysis users needs
to run the stage III and IV of the saxpipe/mecspipe for the MECS and
the stages II and III (with IV optional) of the saxpipe/lecspipe ,
to produce a clean event file.
This requires to download the raw event files, the HK files and the
SAXDAS software. In practice unless there is a need of testing
new calibration data or software modification it is recommanded to
retrieve the clean event files from the archive.
PDS
The PDS event files, Housekeeping and GTIs have been generated running
the stages I & IV of
saxpipe/pdspipe , the main SAXDAS script that controls the pipeline.
The output files are event from all the PDS detectors
selected by rise-time and gain corrected , an Housekeeping file and
several GTI files all the events for both clusters.
To extract spectra and lightcurves from this event file, users
has to run the SAXDAS script pdprocuts .
All the PDS GTI archived files and the event file are necessary
to run the script.
The archived spectra and lightcurves can be used within XSPEC and XRONOS.
If you have any questions concerning
BeppoSAX
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