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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"

23 results found.

  1. GRB 161219B: afterglow and SN2016jca optical observations
  2. PESSTO follow-up of GRB 161219B/SN2016jca
  3. GMRT radio detection of GRB 161219B
  4. GRB 161219B: Spectroscopic detection of the associated SN with OSIRIS/GTC
  5. GRB 161219B: UKIRT near-IR afterglow detection
  6. GRB 161219B: POLAR Observation
  7. GRB161219.78 MASTER-Net OT detection
  8. GRB 161219B: Rapid ALMA Observations & Detection
  9. Correction to GCN 20323 "Konus-Wind observation of GRB 161219B"
  10. Konus-Wind observation of GRB 161219B
  11. GRB 161219B: SALT observations
  12. GRB 161219B: VLT/X-shooter redshift
  13. GRB 161219B: MITSuME Akeno Optical Observation
  14. GRB 161219B: VLA Detection
  15. GRB 161219B: ISON/Terskol optical observations
  16. GRB 161219B: Swift-BAT refined analysis
  17. GRB 161219B: Swift/UVOT Detection
  18. GRB 161219B: Watcher optical observations
  19. GRB 161219B: LCO Sutherland observations
  20. GRB 161219B: GROND afterglow observations
  21. GRB 161219B: Swift-XRT refined Analysis
  22. GRB 161219B: Enhanced Swift-XRT position
  23. GRB 161219B: Swift detection of a burst with an optical afterglow

Advanced

Download all Circulars as a .tar.gz archive:
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