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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 220430A: Nanshan/NEXT optical upper limit
  2. GRB 220430A: Nanshan/HMT optical upper limit
  3. GRB 220430A: GIT optical upper limits
  4. GRB 220430A: AstroSat CZTI detection
  5. GRB 220430A: Swift-BAT refined analysis
  6. GRB 220430A: CAHA 2.2m telescope optical limit
  7. GRB 220430A: Swift-XRT refined Analysis
  8. Swift GRB 220430A: Global MASTER-Net observations report
  9. GRB 220430A: GRANDMA observations
  10. GRB 220430A: Mondy and AbAO optical upper limits
  11. GRB 220430A: AGILE detection
  12. GRB 220430A: MeerLICHT optical upper limits
  13. GRB 220430A: Enhanced Swift-XRT position
  14. GRB 220430A: Swift detection of a burst or Swift J0630.4+0932

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.

gcn.nasa.gov

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