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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. GRB170306A: SALT observations
  2. GRB 170306A: GROND afterglow detection
  3. GRB 170306A, Swift-BAT refined analysis
  4. GRB 170306A: Swift-XRT refined Analysis
  5. GRB 170306A: Swift/UVOT Upper Limits
  6. GRB 170306A: GROND observations
  7. GRB 170306A: LCO Cerro Tololo observations
  8. GRB 170306A: Swift detection of a burst

Advanced

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