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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"

13 results found.

  1. GRB 080320 : Faulkes Telescope North Observations
  2. GRB 080320, Swift-BAT refined analysis
  3. GRB 080320: Swift XRT refined analysis
  4. GRB 080320: Early Super-LOTIS Observations
  5. GRB 080320: J detection with FLAMINGOS
  6. GRB 080320: optical limit
  7. GRB 080320: Gemini-N optical afterglow
  8. GRB 080320: SDSS source and Gemini-N observations
  9. GRB 080320: Enhanced Swift-XRT position
  10. GRB 080320: optical limit from IAC80
  11. GRB 080320 - SDSS Pre-Burst Observations
  12. GRB 080320: Swift detection of a burst
  13. GRB 080320: ROTSE-III Optical Limits

Advanced

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