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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 071028B Swift-BAT detection of a burst
  2. GRB 060123: Gemini spectroscopy of the putative host galaxy
  3. GRB 060123: VLA Radio Observations
  4. GRB 060123: Swift refined analysis of an unusual GRB
  5. Refined XRT Position for GRB 060123
  6. GRB060123: Optical and IR Imaging
  7. GRB 060123: P200 Observations
  8. GRB 060123: Swift detection of a very long, faint burst

Advanced

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