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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"

10 results found.

  1. GRB 190719C: VLT/X-shooter spectroscopic redshift of the host galaxy
  2. GRB 190719C: optical afterglow confirmation
  3. GRB 190719C: Fermi GBM detection
  4. GRB 190719C: Swift-BAT refined analysis
  5. GRB 190719C: Swift/UVOT Upper Limits
  6. GRB 190719C: Swift-XRT light-curve fit
  7. GRB 190719C: Swift-XRT refined Analysis
  8. GRB 190719C: NOT candidate optical afterglow and host
  9. GRB 190719C: Swift detection of a burst
  10. GRB 190719C: Fermi GBM Final Real-time Localization

Advanced

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