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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"

13 results found.

  1. GRB 260208B: refined analysis of the EP-FXT observation
  2. GRB 260208B: AstroSat CZTI detection of a bright long burst
  3. GRB 260208B: Swift-XRT observations
  4. GRB 260208B: COLIBRÍ optical observations
  5. GRB 260208B: EP-FXT observation
  6. GRB 260208B: SVOM/VT optical candidate
  7. GRB 260208B: Swift ToO observations
  8. GRB 260208B: SVOM/GRM observation of a bright burst
  9. GRB 260208B: Fermi GBM Detection
  10. LAT GRB 260208B: Global MASTER-Net observations report
  11. GRB 260208B: Fermi-LAT detection
  12. GRB 260208B: BALROG localization (Fermi Trigger 792237169 / GRB 260208412)
  13. GRB 260208B: Fermi GBM Final Real-time Localization

Advanced

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