The HEASARC Calibration Database
Caldb manager: Dr. M. F. CorcoranDescription
The HEASARC's calibration database (CALDB) system stores and indexes datasets associated with the calibration of high energy astronomical instrumentation. The system can be accessed by users and software alike to determine which calibration datasets are available, and which should be used for data reduction and analysis. (Read more...)User Information
- CALDB Location: https://heasarc.gsfc.nasa.gov/FTP/caldb
- Supported Missions: Missions and Instruments which use the HEASARC CALDB.
- Download and Installation Instructions: Get your own copy of the CALDB for any supported mission
- Remote Access to the HEASARC CALDB: The easiest way to access calibration data from the HEASARC
- CALDB Documentation Library to the HEASARC CALDB: CALDB file format definitions, user guides and more. For quick reference, a table listing the CALDB Header Keywords, with brief definitions, is available.
- Cross-Calibration Information This page contains documents regarding efforts at cross-calibration of X-ray and Gamma-ray instruments.
- CALDB Software Find out what HEASOFT software interacts with the CALDB.
- Installing Managing or Creating your own CALDB Download the HEASARC CALDB and update it, or make your own CALDB
- CALDB Personal Who's who at the CALDB (and who was who)
- Need Help? Take a look at the HEASARC Frequently Asked Questions, or use the Feedback page to ask a question.
- CALDB Mirror A mirror of the HEASARC CALDB is available at ftp://cda.cfa.harvard.edu/pub/arcftp/heasarc/caldb/
- The International Astronomical Consortium for High Energy Calibration The IACHEC aims to provide standards for high energy calibration and supervise cross calibration between different missions
The NuSTAR FPM caldb was updated to version 20251215. This release includes a new clock correction file, v219 using a new temperature model. Please see the release notes for more details.
The Chandra CalDB 4.12.3 is now installed in and available from the HEASARC CALDB. Chandra 4.12.3 was released by the CXC on December 16, 2025.
The NuSTAR FPM caldb was updated to version 20251201. This release includes a new clock correction file, v218 using a new temperature model. Please see the release notes for more details. Also released was NuSTAR caldb version 20251110, which included v217 of the clock correction file.
The Swift SC has been updated to version 20251106 to update the clock correction file to v169 ...
Page author: Michael F. Corcoran
Last updated: Monday, 21-Apr-2025 17:48:35 EDT.