Dear Suzaku Users,
Having incorporated the latest calibration results, Suzaku XIS team
has developed the XIS RMF generator ftool "xisrmfgen",
which considers secular degradation of the XIS energy resolution to
calculate time-dependent XIS response. Xisrmfgen is currently
being tested on multiple platforms by Suzaku GOF at NASA/GSFC.
Responding to strong demands of the early release and considering its
scientific merits, Suzaku team has decided to make a beta-release of
xisrmfgen (only executable on limited platforms) to interested Suzaku
users, in particular to those planning to present early results at the
December Suzaku conference in Kyoto. Until xisrmfgen is released in
the official ftools package from NASA/GSFC, please obtain the
beta-version from here:
Also, please find that new XIS calibration files
have been released in the HEASARC CALDB on Nov 2, 2006 taking
into account the latest calibration. Please obtain these latest CALDB
files from NASA/GSFC to use xisrmfgen. In particular, the following XIS calibration files are essential to
calculate precise XIS responses using xisrmfgen (NEW), xissimarfgen,
xiscontamicalc and xissim (in HEAsoft 6.1.1):
To obtain these files, see NASA/GSFC
Here are some explanation of the improvements of the new calibration
- xisrmfgen can produce time-dependent XIS RMF taking account of
secular change of the detector responses, particularly spectral
resolution, in combination with ae_xi[0-3]_rmfparam_20061024.fits.
However, the "Spaced-row Charge Injection (SCI)" observations
which started in Sep 2006 are not taken care of, yet.
- The depletion layer thickness of XIS0 has been revised (78.8 -> 68 um)
in ae_xi0_quanteff_20060825.fits, reflecting in-orbit calibration
with Crab nebula to make the spectral index consistent among sensors.
- The optical blocking filter contamination files,
ae_xi[0-3]_contami_20061016.fits, have been significantly improved
to take into account the secular change of the contamination
during the AO-1 period.
- Consequently, xissimarfgen (in HEAsoft 6.1.1) can produce ARFs
taking account of time-dependent contamination using the new
contamination files. Similarly, xiscontamicalc can calculate
the precise amount of contamination, and xissim can incorporate
the contamination in the ray-tracing simulation.
Please try new "xisrmfgen", and report problems or feedbacks to
the Suzaku help desk in Japan (English | Japanese).