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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 100213B: Detection of Fading Optical Afterglow
  2. GRB 100213B: Mondy optical observations
  3. GRB
  4. GRB 100213B: GRT Optical Observation
  5. GRB 100213B: Enhanced Swift-XRT position
  6. GRB 100213B: Gemini-N Observations
  7. GRB 100213B: Swift/UVOT Upper Limits
  8. GRB 100213B: PAIRITEL NIR Upper Limits
  9. GRB 100213B: Swift-BAT refined analysis
  10. GRB 100213B: Swift XRT refined analysis
  11. GRB 100213A: Swift XRT refined analysis
  12. GRB 100213B: NOT optical observations
  13. GRB 100213B: Swift detection of a burst

Advanced

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