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About
The Swift Mission UK involvement Instruments
GRBs before Swift GRBs in the Swift era Non-GRB science with Swift GRB research at Leicester
Spacecraft status Swift in the press Swift Videos
Support
Helpdesk TOO requests Guest Investigator program Target visibility checker Search transient database
Data Access
Overview Quick Look GCN Notices Download obs data Search obs catalogue The 2SXPS catalogue The LSXPS catalogue
Data Analysis
Data analysis overview Swift software
Build XRT products
BAT data analysis guide XRT data analysis guide XRT digest UVOT data analysis guide
Data Products
GRBs Full dataset Swift XRT products for GRBs XRT positions XRT light curves XRT spectra XRT GRB catalogue XRT GRB images Burst analyser Prompt data GRB field info XRT prompt analysis External triggers Einstein Probe follow up SVOM follow up Neutrino follow up Gravitational Wave follow up
Publications
Publication index Published papers Submitted papers XRT instrument papers ATels GCNs Conferences
Links
Databases NED Simbad GCN circulars archive GRB data table Software & Tools Swift Software (HEASoft) Xanadu WebPIMMS Institutional Swift Sites GSFC PSU OAB SSDC MSSL University of Leicester

Help

Build Swift-XRT products.

Version 1.10 of the Python API has been released as part of swifttools v3.0. Users are advised to update, and see the Release notes.
On 2022 August 5 we added some new options for spectral fitting to this service.

The www.swift.ac.uk website and all related services will be offline on Tuesday 27^th January 2026, from 9:00 am UT for up to three hours. This is for routine but essential maintenance. Any running processing will be terminated at this point; to balance minimising the service interruption with the risk of killing jobs, user-requested job submission will be disabled at 00:00 UT on the 27^th. We apologise for any inconvenience.

On-demand services are currently offline.
The on-demand processing is temporarily offline due to a software problem. We will restore it as soon as possible.