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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"

7 results found.

  1. GRB 171004A: Swift/UVOT Upper Limits
  2. GRB 171004A: Swift-BAT refined analysis
  3. GRB 171004A: Correction to RATIR Astrometry and Photometry
  4. GRB 171004A: Swift-XRT refined Analysis
  5. GRB 171004A: Enhanced Swift-XRT position
  6. GRB 171004A: RATIR Optical and NIR Observations
  7. GRB 171004A: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
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