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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').

4 results found.

  1. IPN triangulation of GRB 230625B (ultra-long)
  2. GRB 230625B: CALET Gamma-Ray Burst Monitor detection
  3. GRB 230625B: AstroSat CZTI detection
  4. GRB 230625B: Swift/BAT-GUANO detection of a long burst

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Download all Circulars as a .tar.gz archive:
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A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

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