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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 070208: MARGE Optical Observations
  2. GRB 070208: Swift XRT refined analysis
  3. GRB 070208: RAPTOR detection of early afterglow onset
  4. GRB070208: Absorption and emission redshift from Gemini
  5. GRB 070208: MDM Optical Decay
  6. GRB 070208, Swift-BAT refined analysis
  7. GRB 070208: Early IR detection and afterglow astrometry
  8. GRB 070208: Afterglow confirmation from P60
  9. GRB 070208: ROTSE-III Optical Limits
  10. GRB 070208: MDM Observations
  11. GRB 070208: 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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