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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"

11 results found.

  1. GRB 140110A: Second Follow-up Swift-XRT Observation
  2. GRB 140110A: Further Swift-XRT Observation
  3. GRB 140110A: Swift/UVOT retraction of UVOT candidates
  4. IPN Triangulation of GRB 140110A
  5. GRB 140110A: Swift/UVOT Observations
  6. GRB 140110A: Swift XRT observations
  7. GRB 140110A: Reported UVOT OT not GRB afterglow
  8. GRB 140110A: OT detection in Swift/UVOT imaging
  9. GRB 140110A: Fermi GBM observation
  10. GRB 140110A Tiled Swift observations
  11. GRB 140110A: Fermi-LAT detection of a burst

Advanced

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