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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. IceCube-181023A: HAWC follow-up
  2. IceCube-181023A: MASTER Net optical alert and follow up observations
  3. Search for counterparts to IceCube-181023A with IceCube
  4. Fermi-LAT Gamma-ray Observations of IceCube-181023A
  5. GRB 181023A: Swift-BAT refined analysis
  6. GRB 181023A: Swift/UVOT Upper Limits
  7. IceCube-181023A - IceCube observation of a high-energy neutrino candidate event
  8. GRB 181023A: Swift-XRT refined Analysis
  9. GRB 181023A: Enhanced Swift-XRT position
  10. GRB 181023A: KAIT Optical Upper Limit
  11. GRB 181023A: Swift detection of a burst

Advanced

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