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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"

9 results found.

  1. Radio observation of GRB 080520 with ATCA
  2. GRB 080520: VLT host detection
  3. GRB 080520, Swift-BAT refined analysis
  4. GRB080520: Swift/UVOT observations
  5. GRB 080520: VLT redshift
  6. GRB 080520, GROND observations
  7. GRB 080520: Enhanced Swift-XRT position
  8. GRB 080520: Swift XRT Refined Analysis
  9. GRB 080520: Swift detection of a burst with optical afterglow

Advanced

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