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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"

8 results found.

  1. GRB 190103B: Swift/UVOT Upper Limits
  2. GRB 190103B: CALET Gamma-Ray Burst Monitor detection
  3. Konus-Wind observation of GRB 190103B
  4. GRB 190103B: Bassano Bresciano observatory upper limit
  5. GRB 190103B: Swift-BAT refined analysis
  6. GRB 190103B: Swift-XRT refined Analysis
  7. GRB 190103B: Enhanced Swift-XRT position
  8. GRB 190103B: 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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