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GraceDB Overview

The Gravitational-Wave Candidate Event Database (GraceDB) is a service operated by the LIGO Scientific Collaboration. It provides a centralized location for aggregating and retrieving information about candidate gravitational-wave events. GraceDB provides an API for programmatic access, and a client package is available for interacting with the API.


Useful information

  • Information about GW alerts and real-time data products is available in the LIGO/Virgo Public Alert Guide.
  • Real-time status of the LIGO Data Grid (LVK Credentials Required).
  • Need help? Send an email to computing-help@ligo.org, or LIGO/Virgo users can report issues on the GraceDB Gitlab page.

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    Attention {{signoff_instrument}} Operator


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    The following superevents require your signoff:

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    The following events require your sign-off:

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    Events submitted within the last 24 hours:

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    Events older than 24 hours:

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    Please click on the link(s) above and use the form at the top of the page.

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