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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 230815A: ATCA detection of radio counterpart
  2. GRB 230815A: VLT/HAWK-I near-infrared afterglow detection
  3. GRB 230815A: SOAR/Goodman follow-up imaging
  4. GRB 230815A: Swift-BAT refined analysis
  5. GRB230815A: Swift/UVOT upper limits
  6. GRB 230815A: Swift-XRT refined Analysis
  7. GRB230815A: BOOTES-6/DPRT optical upper limit
  8. GRB 230815A: Fermi GBM detection
  9. Swift GRB 230815A: Global MASTER-Net observations report
  10. GRB 230815A: Enhanced Swift-XRT position
  11. GRB 230815A: 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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