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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. GRB 070129: MDM I-band Detection
  2. GRB 070129: afterglow confirmation
  3. GRB 070129: Swift/UVOT Upper limits
  4. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  5. GRB 070129, Swift-BAT refined analysis of a particularly long
  6. GRB 070129: Xinglong TNT optical Upper Limit
  7. GRB 070129: Swift-XRT Refined Analysis
  8. GRB 070129: VLT observations
  9. GRB 070129: Swift detection of a burst

Advanced

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