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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"

13 results found.

  1. GRB 110106B, radio observations
  2. GRB 110106B: MASTER optical observations
  3. GRB 110106B: early optical and near-IR observations
  4. GRB 110106B: MASTER early optical observations
  5. GRB 110106B: Fermi GBM detection
  6. GRB 110106B: Swift-XRT refined Analysis
  7. GRB 110106B: Gemini-North / WHT detection of a fading afterglow
  8. GRB 110106B Gemini-N galaxy redshift
  9. GRB 110106B: Liverpool Telescope observations
  10. GRB 110106B: WHT candidate afterglow
  11. GRB 110106B: Swift-BAT refined analysis
  12. GRB 110106B: Enhanced Swift-XRT position
  13. GRB 110106B: Swift detection of a burst

Advanced

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