CIAO 3.1 Released - 7 July 2004
=================================
The Chandra X-ray Center (CXC) is pleased to announce that version 3.1 of CIAO
("Chandra Interactive Analysis of Observations") and version 2.27 of CALDB are
now available for download from:
http://cxc.harvard.edu/ciao/download/
They are also available from the European mirror site at:
http://ledas-cxc.star.le.ac.uk/ciao/download/
-----------------------------------
CIAO 3.1 contains enhancements to the tool acis_process_events to handle the
time-dependent ACIS gain correction. There are also bug fixes to the Data
Model library, Sherpa, and several CIAO tools.
There is also a new "S-Lang in CIAO" web site (http://cxc.harvard.edu/slang/)
which starts to collect information and documentation about the use of the
S-Lang scripting language as implemented in CIAO. Many improvements and
additions to these "S-Lang in CIAO" web pages will be coming in the next few
months.
For complete information on this release, please see the full Release Notes
(http://cxc.harvard.edu/ciao/releasenotes/) which now contain new paragraphs
"How this affects your data analysis" to help users evaluate the need of
rerunning a processing tool in CIAO following changes in software or
calibration.
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In tandem with CIAO3.1 is the release of the Chandra Calibration Database
CALDB 2.27 which contains essential elements for CIAO version 3.1, including
ACIS T_GAIN time-dependent gain correction files. Release Notes are available
at:
http://cxc.harvard.edu/caldb/downloads/Release_notes/CALDB_v2.27.txt
The new acis_process_events require CALDB2.27 therefore it *must* be
downloaded and installed (or upgraded from an earlier version) to run CIAO 3.1.
Information about CALDB 2.27 and CALDB in general can be found in the newly
redesigned Chandra Calibration Database website at:
http://cxc.harvard.edu/caldb/
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CIAO3.1 is distributed for the following platforms:
Solaris 2.8
Linux Redhat 6.2
Linux Redhat 8
Mac OS X 10.2.8
More details at http://cxc.harvard.edu/ciao/download/platforms.html
-----------------------------------
As always please send questions and requests for enhancements to the CXC
HELPDESK (http://cxc.harvard.edu/helpdesk/)
CIAO3.1 is a collaborative effort between the SAO/CXC Science Data Systems,
the SAO/CXC Data Systems, and MIT/CXC personnel.
Antonella Fruscione (for the CIAO development team)
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