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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"

12 results found.

  1. GRB 181123B: ATCA 5/9 GHz rapid-response radio observation
  2. GRB 181123B: Keck further near-infrared imaging
  3. GRB 181123B: Insight-HXMT/HE detection
  4. GRB 181123B: Global MASTER Net optical inspection
  5. GRB 181123B: Swift-BAT lag analysis and search for extended emission
  6. GRB 181123B: Keck near-infrared imaging
  7. GRB 181123B: Gemini-North optical detection
  8. GRB 181123B: Swift/UVOT Upper Limits
  9. GRB 181123B: Swift-XRT refined Analysis
  10. GRB 181123B: Enhanced Swift-XRT position
  11. GRB 181123B: Prompt enhanced Swift-XRT position
  12. GRB 181123B: Swift detection of a short burst

Advanced

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