The HEASARC Calibration Database

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 Supported Missions: Missions and Instruments which use the HEASARC CALDB Find out who's using the CALDB Remote Access to the HEASARC CALDB The easiest way to access calibration data from the HEASARC CALDB Documentation Library 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 Personnel 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/

Latest News Chandra CALDB 4.11.1 installed at the HEASARC (18 Apr 2024) The Chandra CalDB 4.11.1 is now installed and available at the HEASARC. Chandra 4.11.1 was released by the CXC on April 18, 2023. NuSTAR Caldb Update (16 Apr 2024) The NuSTAR FPM caldb was updated to version 20240405. This release includes a new clock correction file, v180. Please see the release notes for more details. NuSTAR Caldb Update (26 Mar 2024) The NuSTAR FPM caldb was updated to version 20240325. This release includes a new clock correction file, v179. Please see the release notes for more details. Important NuSTAR Caldb Update (21 Mar 2024) The NuSTAR FPM caldb was updated to version 20240311a. This release corrects 13 invalid files which existed in the NuSTAR FPM caldb from Feb. 29, 2024 to Mar. 20, 2024. Please see the release notes for details. +RSS... [What???] +Caldb News Archive +Caldb Mail Archives