Chandra Announcement: Chandra CalDB version 4.9.8 released

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Tara Gokas

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Jun 16, 2022, 4:08:19 PMJun 16
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Chandra CalDB version 4.9.8 released to the public

The CXC announces the public release of Chandra CalDB version 4.9.8. This upgrade includes the following items:

* HRC-I/Grating angle corrections
* HRC-S QEU file set upgrade version N0016
* PCAD ALIGN updates version N0010, a new 18-file set with effective dates 2013-2021 (used in standard data processing, not CIAO)

For details, please see the CalDB 4.9.8 Release Notes located at:
https://cxc.cfa.harvard.edu/caldb/downloads/Release_notes/CALDB_v4.9.8.html

See also "How CalDB 4.9.8 Affects Your Analysis" at
https://cxc.cfa.harvard.edu/ciao/releasenotes/ciao_4.14_release.html#HowCALDB4.9.8AffectsYourAnalysis

To download and install CalDB 4.9.8 on you system with CIAO 4.14, using the preferred Conda package, see the following link:
https://cxc.cfa.harvard.edu/ciao/download/index.html

Alternatively, to use the ciao-install script to install or upgrade your CIAO 4.14 CalDB to version 4.9.8, please see the following link:
https://cxc.cfa.harvard.edu/ciao/download/ciao_install.html

Manual download and installation instructions are also available at http://cxc.harvard.edu/caldb/downloads/

Users who do not wish to download the full CalDB, but would rather access it via the web for their specific observations only, may use the CIAO contributed script "download_obsid_caldb". Note that the web-accessible CalDB may take a day or two to be upgraded to this latest CalDB release.

As always, please send questions and requests for enhancements to the CXC HelpDesk (http://cxc.harvard.edu/helpdesk/).
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