Gravitational Wave
Open Science Center

Discover Gravitational-Wave Observatory Data,
Tutorials, and Software Tools.

Event
Catalog

      The Gravitational-wave Transient Catalog (GWTC) is a cumulative set of
      events detected by LIGO, Virgo, and KAGRA.
    

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Open Data Workshop

      Participants will receive a crash-course in gravitational-wave data
      analysis that includes lectures, software tutorials, and a data challenge.
    

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Tutorials

      Learn with tutorials that will lead you step-by-step through some common
      data analysis tasks.
    

News

O4a Data Release

O4a Open Data Release

The LIGO, Virgo, and KAGRA collaborations have publicly released a new dataset from the first segment of their fourth observing run (O4a) covering Gravitational-Wave (GW) observations from May 24, 2023, to January 16, 2024. The data release currently includes strain data from the two LIGO observatories and also some of their auxiliary channels. The users will also find in our pages the fourth version of the Gravitational Wave Transient Catalog (GWTC 4.0)

GW231123

GW231123 Data Released

Read the notes for the release of the GW231123_135430 event! GW231123 is the merger of the most massive black holes ever observed with gravitational waves. The merger produced a final black hole more than 225 times the mass of our Sun. The signal was observed during the fourth observing run (O4) of the LVK network on November 23, 2023.

OSDF

CVMFS Deprecation Notice

The CVMFS software tool to download gravitational-wave data locally in your machine will be discontinued and replaced by the Open Science Grid's Open Science Data Federation (OSDF) service. If you were using CVMFS before, read our new documentation page to learn how to make the switch to OSDF.