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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"

11 results found.

  1. Konus-Wind observation of GRB 141130A
  2. GRB 141130A: Mondy optical observations
  3. GRB 141130A: Mondy optical light curve
  4. GRB 141030A: Nanshan very early optical observations
  5. GRB 141130A: Swift-BAT refined analysis
  6. GRB 141130A: Swift/UVOT Detection
  7. GRB 141130A: Swift-XRT refined Analysis
  8. GRB 141130A: Enhanced Swift-XRT position
  9. GRB 141130A: Nanshan optical observations
  10. GRB 141130A: Mondy optical observations
  11. GRB 141130A: 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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