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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. Possible radio detection of GRB160703A with the GMRT
  2. GRB160703A: Astrosat CZTI detection
  3. GRB 160703A: 15 GHz upper limits from AMI
  4. GRB 160703A: Keck-I/LRIS Optical Observations
  5. GRB 160703A: Swift/UVOT Detection
  6. GRB 160703A: Swift-XRT afterglow detection
  7. GRB 160703A: MITSuME Ishigakijima Optical Observation
  8. GRB 160703A: MITSuME Akeno Optical Observations
  9. GRB 160703A: Bassano Bresciano Observatory upper limits
  10. Konus-Wind observation of GRB 160703A
  11. GRB 160703A: Swift-BAT refined analysis
  12. GRB 160703A: Zadko observatory - Gingin optical observations
  13. GRB 160703A: 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.
Want to contribute code to GCN?
Get involved on GitHub.

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