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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"

12 results found.

  1. GRB 141005A: iTelescope.Net T21 Optical Observation
  2. GRB 141005A: Additional P60 imaging and afterglow confirmation
  3. GRB 141005A: GROND observations
  4. Konus-Wind observation of GRB 141005A
  5. GRB 141005A: Swift-XRT refined Analysis
  6. GRB 141005A: Swift/UVOT Upper Limits
  7. GRB 141005A: Swift-BAT refined analysis
  8. GRB 141005A: Fermi GBM Detection
  9. GRB 141005A: Enhanced Swift-XRT position
  10. GRB 141005A: RATIR Optical Observations
  11. GRB 141005A: P60 probable afterglow deteaction
  12. GRB 141005A: 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.
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Get involved on GitHub.

gcn.nasa.gov

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