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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 140114A: optical upper limit
  2. GRB 140114A: NOT afterglow observations
  3. GRB 140114A: Continued RATIR Optical and NIR Observations
  4. GRB 140114A: MITSuME Okayama upper limits
  5. GRB 140114A: ROTSE-III Optical Limits
  6. GRB 140114A: Swift-XRT refined Analysis
  7. GRB 140114A: Swift-BAT refined analysis
  8. GRB 140114A: Swift/UVOT Upper Limits
  9. GRB 140114A: KAIT Optical Upper Limit
  10. GRB 140114A: Enhanced Swift-XRT position
  11. GRB 140114A: RATIR Optical and NIR Afterglow Detection
  12. GRB 140114A: P60 Observations
  13. GRB 140114A: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
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Get involved on GitHub.

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