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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 090113, the review of the sky area in plate archives
  2. GRB 090113: LOAO Detection Limits in R, I, z, Y-band
  3. GRB 090113: Swift UVOT upper limits
  4. GRB 090113: GROND Upper Limits
  5. GRB 090113: Swift-XRT refined analysis
  6. GRB 090113: Observations from NOT
  7. GRB 090113: Enhanced Swift-XRT position
  8. GRB 090113: Swift-BAT refined analysis
  9. GRB 090113: ROTSE-III Optical Limits
  10. GRB090113: XRT position
  11. GRB 090113: Swift detection of a burst

Advanced

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