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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 060908: Detection of a possible host
  2. VLA observations of GRB 060908
  3. GRB 060908: redshift
  4. GRB 060908, Swift/XRT refined analysis
  5. GRB 060908: Swift/UVOT Observations
  6. GRB 060908: Danish/DFOSC optical observations
  7. GRB 060908, Swift-BAT refined analysis
  8. GRB 060908 - SDSS Pre-burst Observations
  9. GRB 060908: REM optical prompt observation
  10. GRB 060908: PROMPT Detection of a Bright Counterpart
  11. GRB 060908: Swift detection of a burst with a bright optical counterpart

Advanced

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