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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 150211A: ROTSE-III Upper Optical Limit
  2. Konus-Wind observation of GRB 150211A
  3. GRB 150211A iTelescope observation
  4. GRB 150211A: Swift/UVOT Upper Limits
  5. GRB 150211A: Swift-BAT refined analysis
  6. GRB 150211A: KAIT Optical Upper Limit
  7. GRB 150211A: Mondy optical upper limit
  8. GRB 150211A: Swift-XRT refined Analysis
  9. GRB 150211A: RATIR Optical and NIR Observations
  10. GRB 150211A: No afterglow detection in the Swift/UVOT initial observation
  11. GRB 150211A: Swift-XRT observations
  12. GRB 150211A: Swift detection of a burst
  13. GRB 150211A: MASTER early optical observations

Advanced

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