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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"

8 results found.

  1. GRB 140226A/iPTF14yb: Mondy optical observations
  2. GRB 140226A/iPTF14yb: 1.23m CAHA observations
  3. GRB 140226A/iPTF14yb: Swift/UVOT Observations
  4. GRB 140226A/iPTF14yb: Mondy optical observations
  5. GRB 140226A/iPTF14yb: RATIR Optical and NIR Observations
  6. GRB 140226A / iPTF14yb: Swift-XRT confirms a fading X-ray source
  7. Konus-Wind observation of GRB 140226A
  8. IPN triangulation of GRB 140226A, a possible GRB counterpart to iPTF14yb

Advanced

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