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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. 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').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

12 results found.

  1. GRB 090401B: Suzaku WAM observation of the prompt emission
  2. Konus-Wind observation of GRB 090401B
  3. GRB 090401B: Xinglong TNT optical Upper Limit
  4. GRB 090401B: VLA radio upper limit
  5. GRB 090401B: Upper limits of MITSuME optical observation
  6. GRB 090401B: NOT optical observations
  7. GRB 090401B: AGILE refined analysis
  8. GRB 090401B: Swift XRT Refined Analysis
  9. GRB 090401B: Enhanced Swift-XRT position
  10. AGILE Gamma-ray detection of GRB 090401B
  11. GRB 090401B: Swift-BAT refined analysis
  12. GRB 090401B: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

gcn.nasa.gov

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