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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"

11 results found.

  1. GRB 151112A: GROND photometric redshift and i'-band prediction
  2. GRB 151112A: Swift/UVOT Upper Limits
  3. GRB 151112A: MAXI/GSC detection
  4. GRB 151112A: GROND Detection of the Optical/NIR Afterglow Candidate
  5. GRB 151112A: Swift-XRT refined Analysis
  6. GRB 151112A: Swift-BAT refined analysis
  7. GRB 151112A: Enhanced Swift-XRT position
  8. GRB 151112A: MASTER-NET optical limit
  9. GRB 151112A: initial UVOT observations
  10. GRB 151112A: Swift-XRT observations
  11. GRB 151112A: Swift detection of a burst

Advanced

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