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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. GRB 210807A: continued Assy, AbAO and Mondy observations
  2. GRB 210807A: Tautenburg observations
  3. GRB 210807A: Detection by GRBAlpha
  4. GRB 210807A: Swift-BAT refined analysis
  5. GRB 210807A: Swift/UVOT Detection
  6. GRB 210807A: Swift-XRT refined Analysis
  7. GRB 210807A: correction to the GCN Circ. #30614 Assy optical observations
  8. Swift GRB 210807A: Global MASTER-Net observations report
  9. GRB 210807A: Enhanced Swift-XRT position
  10. GRB 210807A: BOOTES-5/JGT optical afterglow detection
  11. GRB 210807A: Swift detection of a burst with an optical counterpart

Advanced

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