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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.

Advanced Search Examples (click to copy):

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

25 results found.

  1. GRB 140629A: SAO RAS Rc band photometry
  2. GRB 140629A, Optical observations
  3. GRB 140703A: MASTER optical observations
  4. GRB 140629A: MITSuME Akeno Optical observation
  5. GRB 140629A: MASTER-Net preliminary light curve
  6. GRB 140629A: SAO RAS monitoring
  7. GRB 140629A: additional P60 observations
  8. GRB 140629A: Nishi-Harima NIR Observations
  9. Konus-Wind observation of GRB 140629A
  10. GRB 140629A: Swift/UVOT Detection
  11. GRB 140629A: TNG redshift confirmation
  12. GRB 140629A: P60 observations
  13. GRB 140629A: Swift-XRT refined Analysis
  14. GRB 140629A: BTA redshift
  15. GRB 140629A: MITSuME Ishigakijima Optical Observation
  16. GRB 140629A: T100 observations
  17. GRB 140629A: NOT optical observations
  18. GRB 140629A: KWFC z-band photometry
  19. GRB 140629A : Virtual Telescope optical observations
  20. GRB 140629A: RTT150 optical observations
  21. GRB 140629A: Swift-BAT refined analysis
  22. GRB 140629A : Xinglong TNT optical observation
  23. GRB 140629A: Enhanced Swift-XRT position
  24. GRB 140629A: MASTER OT detection
  25. GRB 140629A: Swift detection of a burst with an optical counterpart

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