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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"

14 results found.

  1. GRB 220706A : NICER detection of re-brightening 1 day after the Swift trigger
  2. GRB 220706A: Swift/UVOT Upper Limits
  3. GRB 220706A: Swift-BAT refined analysis
  4. GRB 220706A: LCO Optical Upper Limits
  5. GRB 220706A: Swift-XRT refined Analysis
  6. GRB 220706A, GROND observations
  7. GRB 220706A: Optical observations from NOT
  8. GRB 220706A: MAXI/GSC detection 84 minutes after the Swift Trigger
  9. GRB 220706A: Nanshan/NEXT optical upper limits
  10. GRB 220706A: Enhanced Swift-XRT position
  11. Swift GRB 220706A: Global MASTER-Net observations report
  12. GRB 220706A: Zadko observatory - Gingin optical observations
  13. GRB 220706A: Prompt enhanced Swift-XRT position
  14. GRB 220706A: 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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