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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"

7 results found.

  1. GRB 130514B: GROND observations
  2. GRB 130513A: Bassano Bresciano optical upper limit
  3. GRB 130513A: RATIR Optical and NIR Observations
  4. GRB 130513A: Swift/UVOT Upper Limits
  5. GRB 130513A: GROND observations
  6. GRB 130513A: Swift-XRT detection of the afterglow.
  7. GRB 130513A: a long GRB detected by INTEGRAL

Advanced

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