Chandra Announcement: CXC Announces the Release of Chandra CalDB version 4.11.1
Tingle, Evan
CXC Announces the Release of Chandra CalDB version 4.11.1
This upgrade includes the following items:
ACIS CTI correction files version N0012
- Includes new "warm" corrections for ACIS-S2, S3.
- Retains the same warm corrections for the ACIS-I array.
- New upper limit TEMP_HI for the highest band (188.96 K, or -84.19 C) for all chips.
HRC-S QE Uniformity data sets version N0018 (33 files)
- Replaces the N0017 file set.
- Includes one additional new file effective 2023-09-08.
- 1-2% decrease in net HRC-S QE since June 2023.
PCAD ACA-primary DARK_CURR (dark current) file periodic additions #6.
- Does not affect CIAO users.
For details, please see the CalDB 4.11.1 Release Notes located at:
https://cxc.cfa.harvard.edu/caldb/downloads/Release_notes/CALDB_v4.11.1.html
NOTE: CalDB 4.11.1 is only compatible with CIAO 4.16.0 and later versions; CIAO 4.15.x and earlier versions will generate an error in and termination of acis_process_events due to the new CTI file formats.
See also "How CalDB 4.11.1 Affects Your Analysis" at:
To download and install CalDB 4.11.1 on you system with CIAO 4.16.0, 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 4.16.0 CalDB to version 4.11.1, 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.