IXPE Calibration FilesThis page contains a summary of the IXPE Calibration files which are currently in the Calibration Database (CALDB). The table links to the latest CALDB tar file and users can download it to install the IXPE CALDB locally. Instructions for installing the CALDB for IXPE or other missions are available from the CALDB Installation page. The easiest way to access calibration data for IXPE or other HEASARC-supported missions is via remote access, which allows direct access the current HEASARC CALDB without having to install any calibration data locally. Caldb access for IXPE requires the latest version of the caldb.config file (updated 20220314 or later) which is available at https://heasarc.gsfc.nasa.gov/FTP/caldb/software/tools. Please replace your current $CALDBCONFIG file with this updated version.
HISTORY of IXPE CALDB releases
Latest NewsThe IXPE Caldb has been updated for the GPD (version 20260112). Please see the release notes for details. Downloads are available from the IXPE Calibration page. Users can also access the HEASARC IXPE caldb via remote access. The results of the IXPE Cycle 3 peer review, held 12-18 Nov 2025, have been approved. The list of recommended targets, and targets sorted by Right Ascension are now available. The due date for IXPE Cycle 3 proposal submission is Sept 11, 2025. Proposals should be submitted via the HEASARC's ARK Remote Proposal System (RPS). For more information about this cycle, please visit the IXPE Cycle 3 Guide for Proposals Page. IXPE's Detector Unit 2 (DU2) is operating in an anomalous but stable and functional state since 14 April 2025. The detector response has changed and the data processing is being adjusted. The spectral response has been corrected. The response for polarimetry and background filtering are being recalibrated. The data for observations after 10 May 2025 are being made available with DU2 event data removed. After the processing adjustments are completed and tested, new data sets will be released to HEASARC with DU2 included. HEASoft 6.35 has been released and contains updates to the IXPE software tools. Please see the release notes for more details. The HEASoft 6.35.1 patch release contains an update to the extractor tool that is important for IXPE users. Downloads are available from the HEASoft page. IXPE users are recommended to use the latest version of HEASoft for their analysis. |
- HEASARC Director: Vacant
- NASA Official: Ryan Smallcomb
- Web Curator: J.D. Myers
- Last Modified: 14-Mar-2025