The Neil Gehrels Swift Observatory

A new release of the XRT Swift calibration data is available for download.

December 5, 2005


An update of XRT calibration data [tagged as XRT (20051201)] is available for download. This update is an addition to the calibration data tagged XRT(20051028) and released with Heasoft 6.0.4 on Nov 28 2005 .

The list of updates in the XRT (20051201) release are available in the release notes at:

The Swift CALDB can be downloaded via the Web at or via anonymous ftp to be installed on the user's machine or local network, or can be accessed remotely.


There is one tar file for each instrument (BAT, XRT and UVOT) and one for miscellaneous common Swift calibration files (MIS). The contents of the latter (MIS) have been already included in the CALDB tar files for each instrument, therefore is not necessary to download the MIS tar file separately.

The CALDB tar files are available from the CALDB Swift Web page at :

or via anonymous ftp at:

The CALDB installation procedure is available at:


It is also possible to access the CALDB remotely without the need to download and install locally this database. The instructions to set up the remote CALDB access are available from:

*** HELP

Please report any problems with the installation procedure to:

and select CALDB under "Choose a mailing list"