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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"

8 results found.

  1. Swift GRB 210818A: Global MASTER-Net observations report
  2. GRB 210818A: Swift-XRT refined Analysis
  3. GRB 210818A: Swift-BAT refined analysis
  4. Konus-Wind detection of GRB 210818A
  5. GRB 210818A: AstroSat CZTI detection
  6. GRB 210818A: AGILE detection
  7. GRB 210818A: Enhanced Swift-XRT position
  8. GRB 210818A: Swift detection of a burst with an optical counterpart

Advanced

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