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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. GRB 140808A/iPTF14eag: AMI 15 GHz detection
  2. Radio upper limit on the GRB 140808A with the GMRT
  3. GRB 140808A / PTFeag: VLA K-band observations
  4. GRB 140808A / iPTF14eag optical follow-up at HCT
  5. GRB 140808A: Confirmation of the Swift-XRT afterglow
  6. Konus-Wind observation of GRB 140808A
  7. GRB 140808A: Swift/UVOT Upper Limits
  8. GRB 140808A: Redshift from the 10.4m GTC telescope
  9. GRB 140808A: Swift-XRT observations
  10. GRB 140808A: Fermi GBM detection
  11. GRB 140808A: optical afterglow candidate iPTF14eag

Advanced

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