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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 150428A: late-time radio observations
  2. Konus-Wind observation of GRB 150428A
  3. GRB 150428A: Swift/UVOT Upper Limits
  4. GRB 150428A: MASTER-net early optical observation
  5. GRB 150428A: Swift-XRT refined Analysis
  6. GRB 150428A: Swift-BAT refined analysis
  7. GRB 150428A: Danish1.56m optical observations
  8. GRB 150428A: RATIR optical observations
  9. GRB 150428A: P60 observations
  10. GRB 150428A: Enhanced Swift-XRT position
  11. GRB 150428A: GROND Dark Burst Host Candidate
  12. GRB 150428A: Swift detection of a burst

Advanced

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