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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"

10 results found.

  1. GRB190305A: MASTER Global Robotic Net optical observation
  2. GRB 190305A: Swift-XRT afterglow detection
  3. GRB 190305A: CALET Gamma-Ray Burst Monitor detection
  4. Konus-Wind observation of GRB 190305A
  5. IPN Triangulation of GRB 190305A
  6. GRB 190305A: Swift-XRT observations
  7. GRB 190305A: Insight-HXMT/HE detection
  8. GRB 190305A: MAXI/GSC detection
  9. GRB 190305A: Tiled Swift observations
  10. GRB 190305A: AGILE/MCAL detection of a burst

Advanced

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