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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 050315: potential host galaxy
  2. Refined Swift XRT positions for GRB050315, GRB050318 and GRB050319
  3. GRB 050315: Variability Analysis of Swift BAT Time History
  4. GRB 050315, SMARTS optical afterglow decay
  5. GRB 050315: Swift-BAT further refined analysis
  6. GRB 050315, SMARTS optical/IR afterglow observations
  7. GRB 050315 I-band observations
  8. GRB 050315: Absorption redshift
  9. GRB 050315: Optical afterglow identification
  10. Non-detection of GRB050315 in ATCA Radio Observations
  11. GRB 050315: Swift XRT Position
  12. GRB 050315: Early Observations with Swift/UVOT
  13. Swift-BAT detection of GRB 050315

Advanced

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