The Neil Gehrels Swift Observatory

Swift Calibration Files

This page contains a summary of the Swift Calibration files which are currently in the Swift Calibration Database (CALDB). For each instrument, each table links to the latest CALDB releases, from where individual files can be downloaded as well as the CALDB index file. The tables also link to the current CALDB tar files which users can install on their local machines. Note: The tar files for each of the instruments already include the Swift common calibration products.
Instructions for installing the CALDB for Swift or other missions are available from the CALDB Installation page. Note that the easiest way to access calibration data for Swift or other HEASARC-supported missions is via remote access.

Caldb access for Swift requires an updated version of the caldb.config file 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 Swift CALDB releases
    Latest CALDB release date: 2025-05-15 MIS
    Latest CALDB versions : BAT (20230607), XRT (20240522), UVOT(20240201) and MIS(20250515)

    Latest release of the Swift clock offset to run "barycorr" : 20250515

    BAT Calibration Products

    Item Date Comments
    Current CalDB Release 2023-06-07 See Bad times Bad pixels
    Documentation 2024-03-12 Update documentation on Bad Time and Bad Pixel
    Retrieve TAR file 2024-03-12 Size 22 MB compressed
    		 

    XRT Calibration Products

    Item Date Comments
    Current CalDB Release 2024-05-22 Gain update for WT and PC mode sub 6
    Documentation 2024-06-14 Update of the gain documentation
    Retrieve TAR file 2024-05-22 Size 550 MB compressed

    UVOT Calibration Products

    Item Date Comments
    Current CalDB Release 2024-02-01 New telescope definition files
    Documentation 2024-02-01 Update of the telescope definition files
    Retrieve TAR file 2024-02-01 Size 369 MB compressed
    		 

    Swift Common Calibration Products

    Item Date Comments
    Current CalDB Release 2025-05-15 See release note
    Documentation 2005-07-02  
    Retrieve TAR file 2025-05-15 Size 1.5 MB compressed