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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 220715B: VIRT Optical Upper Limit
  2. GRB 220715B: Swift-BAT refined analysis
  3. GRB 220715B: Fermi GBM detection
  4. GRB 220715B: Swift-XRT refined Analysis
  5. GRB 220715B: Swift/UVOT Upper Limits
  6. GRB 220715B: Enhanced Swift-XRT position
  7. GRB 220715B: BOOTES-network optical upper limits
  8. Swift GRB 220715B: Global MASTER-Net observations report
  9. GRB 220715B: Prompt enhanced Swift-XRT position
  10. GRB 220715B: Swift detection of a burst
  11. GRB 220715B: Fermi GBM Final Real-time Localization

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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