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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"

22 results found.

  1. GRB 170519A: 15 GHz upper limits from AMI
  2. GRB 170519A: TShAO and AbAO optical observations
  3. GRB 170519A: Mondy optical observations
  4. GRB 170519A: CrAO optical observations
  5. GRB 170519A: ISON/Multa optical observations
  6. GRB 170519A: MITSuME Akeno Optical Observation
  7. GRB 170519A: Watcher optical observations
  8. GRB 170519A: Continued RATIR Optical and NIR Observations
  9. GRB 170519A: MITSuME Okayama Optical Observation
  10. GRB 170519A: NOT optical observations
  11. GRB 170519A: Redshift from GTC/OSIRIS
  12. GRB170519A, Swift-UVOT Detection
  13. GRB 170519A: BOOTES-5/JGT early optical detection
  14. GRB 170519A: KAIT Optical Observations
  15. GRB 170519A: Swift-XRT refined Analysis
  16. GRB 170519A: iTelescope T11 optical observations
  17. GRB 170519A: Swift-BAT refined analysis
  18. GRB 170519A: Weihai optical observations
  19. GRB 170519A: RATIR Optical and NIR Observations
  20. GRB 170519A: optical observations
  21. GRB 170519A: Enhanced Swift-XRT position
  22. GRB 170519A: Swift detection of a burst with an optical counterpart

Advanced

Download all Circulars as a .tar.gz archive:
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