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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 070509: objects inside XRT error circle
  2. GRB 070509: Swift/UVOT Upper Limits
  3. GRB070509: Swift-XRT Refined Analysis
  4. GRB 070509, Swift-BAT refined analysis
  5. GRB 070509: REM observations
  6. GRB 070509: Swift detection of a burst
  7. GRB 070509: ROTSE-III Optical Limits

Advanced

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