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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"

23 results found.

  1. GRB 161108A: continued TSHAO optical observations
  2. GRB 161108A: TSHAO optical observations
  3. GRB 161014A: 15 GHz upper limits from AMI
  4. GRB 161014A: Continued RATIR Optical and NIR Observations
  5. GRB 161014A: VLT/X-shooter redshift confirmation
  6. Konus-Wind observation of GRB 161014A
  7. GRB 161014A: refined analysis of TSHAO optical observations
  8. GRB 161014A: RATIR Optical and NIR Observations
  9. GRB 161014A: Fermi GBM observation
  10. GRB 161014A: Swift-XRT refined Analysis
  11. GRB 161014A: Swift-BAT refined analysis
  12. GRB 161014A: TNG optical observations
  13. GRB 161014A: AROMA-N Optical Observation
  14. GRB 161014A: Continued MITSuME Akeno Optical Observation
  15. GRB 161014A: Swift/UVOT Detection
  16. GRB161014A: NOT optical observations
  17. GRB 161014A: GTC spectroscopy
  18. GRB 161014A: TSHAO optical observations
  19. GRB 161014A: Swift-XRT and UVOT afterglow detection
  20. GRB 161014A: Kanata optical observation
  21. GRB 161014A : Xinglong TNT optical observation
  22. GRB 161014A: MITSuME-Akeno optical observation
  23. GRB 161014A: Swift detection of a burst

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