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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 061019: MITSuME upper limits
  2. GRB 061019: Super-LOTIS upper limit
  3. GRB 061019: SARA upper limit
  4. GRB 061019: dust-scattered X-ray halo detected in Swift/XRT
  5. GRB 061019: Swift/UVOT upper limit
  6. GRB 061019: SMARTS afterglow confirmation
  7. GRB061019: Swift XRT refined analysis
  8. GRB 061019, Swift-BAT refined analysis
  9. GRB 061019: TAROT La Silla observatory optical observations
  10. GRB 061019: REM K-band candidate afterglow
  11. GRB061019: Swift/XRT position
  12. GRB 061019: Swift-BAT detection of a burst

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
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