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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. GRB 140102A: BOOTES-4 early optical observations
  2. GRB 140102A: P60 observations
  3. GRB 130102A: Swift/UVOT Upper Limits
  4. GRB 130102A: P60 Observations
  5. GRB 130102A: Swift-BAT refined analysis
  6. GRB 130102A: MASTER-Net optical observations
  7. GRB 130102A: Swift-XRT refined Analysis
  8. GRB 130102A: Enhanced Swift-XRT position
  9. GRB 130102A: IAC80 I-band observations
  10. GRB 130102A: Swift detection of a burst

Advanced

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