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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"

12 results found.

  1. GRB 060202: UKIRT/WFCAM K-band and KeckI/LRIS I-band Observation
  2. GRB 060202: PROMPT Observations
  3. GRB 060202: GETS observation
  4. GRB 060202: Gemini-N J, H, K_s observations
  5. GRB 060202 : Kiso B and R band limit
  6. GRB 060202: Near-IR Observation with UKIRT/WFCAM
  7. GRB 060202: Optical Afterglow Candidate from Keck/LRIS
  8. GRB 060202: Refined analysis of the Swift-BAT burst
  9. GRB 060202: Swift/UVOT upper limits
  10. GRB 060202: Swift XRT Team Refined Analysis
  11. GRB 060202 : Lulin R and I band limit
  12. GRB 060202: Swift detection of a burst

Advanced

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