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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"

11 results found.

  1. GRB 210226A: GIT optical upper limit
  2. GRB 210226A: Swift/UVOT Upper Limits
  3. GRB 210226A: Swift-BAT refined analysis
  4. GRB 210226A: Fermi GBM detection
  5. GRB 210226A: KAIT Optical Upper Limit
  6. GRB 210226A: Swift-XRT refined Analysis
  7. Swift GRB 210226A: Global MASTER-Net observations report
  8. GRB 210226A: Burke-Gaffney Observatory optical upper limit
  9. GRB 210226A: Enhanced Swift-XRT position
  10. GRB 210226A: Ondrejov BART/SBT optical limit
  11. GRB 210226A: 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.

gcn.nasa.gov

A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

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