The HEASARC Calibration Database

Caldb manager: Dr. M. F. Corcoran

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:

Supported Missions: Missions and Instruments which use the HEASARC CALDB

    Find out who's using the 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

    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?

CALDB Mirror

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
Latest News

  • NuSTAR CALDB Update (24 Apr 2017)
    The NuSTAR CALibration DataBase was updated on April 24, 2017 (CALDB version 20170419). This updates the NuSTAR clock correction file to version 70, valid through 2017-04-19.
  • HEASOFT 6.21 fixes CALDB Remote Access problems (05 Apr 2017)
    The HEASARC now uses secure (https) connections on all its servers, and unfortunately this breaks virtual file access in CFITSIO. This means that remote access to the HEASARC CALDB is also broken using https or http (which is re-directed to https). Remote access users should download HEASOFT 6.21 and set the $CALDB environment variable to Note that CFITSIO ftp access to the HEASARC servers was broken in versions of HEASOFT prior to HEASOFT 6.21.
  • Hitomi CALDB Data Updated (07 Mar 2017)
    The Hitomi CALDB has been updated for the SGD (update version 20170208), and general spacecraft caldb (update version 20170208), and the Hitomi caldb superindex (update version 20170208).
  • Swift CALDB Data updated (07 Mar 2017)
    A new Swift clock correction file has been added to the Swift SC Caldb (CALDB update version 20170306)
  • +RSS... [What???]

    +Caldb News Archive

    +Caldb Mail Archives

    Page author: Michael F. Corcoran
    Last updated: Wednesday, 05-Apr-2017 15:39:28 EDT.

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    Last modified: Wednesday, 05-Apr-2017 15:39:28 EDT