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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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.

Lucene Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

26 results found.

  1. GRB 070311, deep optical photometry
  2. GRB 060526: Tautenburg Second Epoch Observations
  3. GRB 060526: Break in X-ray light curve
  4. GRB 060526: RTT150 optical observations
  5. GRB060526, optical observations
  6. GRB 060526: RTT150 optical observations
  7. GRB 060526: Multiple Optical Flares
  8. GRB 060526: RTT150 optical observations
  9. GRB 060526: RTT150 optical observations
  10. GRB 060526: Tautenburg OT observation and light curve fitting
  11. GRB 060526: SMARTS optical/IR afterglow observations
  12. GRB 060526: REM observations
  13. GRB 060526: RTT150 optical observations, afterglow flattening
  14. GRB 060526: Optical Flare
  15. GRB 060526: MDM-2.4m Observations
  16. GRB 060526: Refined analysis of the Swift-BAT burst
  17. GRB 060526: RTT150 optical observations
  18. GRB060526, optical observations
  19. GRB 060526: Magellan Redshift
  20. GRB 060526 Lulin optical observation
  21. GRB 060526: Swift/XRT Team refined analysis
  22. GRB 060526: TNG optical observations
  23. GRB 060526: ROTSE-III Observations of Optical Counterpart
  24. GRB 060526: Watcher Observations
  25. GRB 060526: Continued emission for the Swift burst
  26. GRB 060526: Swift detection of a burst with x-ray and optical afterglow

Advanced

Download all Circulars as a .tar.gz archive:
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