VOEvent is the International Virtual Observatory Alliance standard for describing transient celestial events. Comet is an implementation of the VOEvent Transport Protocol, which provides a mechanism for fast and reliable distribution of VOEvents to the community. Comet enables you to subscribe to and act upon real-time streams of ongoing events, to use filters to select only events relevant to your science case and to publish your own events to the global VOEvent backbone.

Comet is developed by John Swinbank as part of the LOFAR Transients Key Project. It is indexed by the Astrophysics Source Code Library as ascl:1404.008. If you make use of Comet in published research, please cite Swinbank (2014).

Released versions of Comet are available for download, while the latest development version can be obtained from the GitHub repository.

Feedback is always welcome. For bug reports and feature requests, please use the issue tracker.