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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').

18 results found.

  1. GRB 090530: PAIRITEL NIR Detections
  2. GRB 090515: Swift/BAT spectral lag results
  3. GRB 090515: VLA observations
  4. GRB 090515: Lick Upper Limits
  5. GRB 090515: ROVOR Upper Limit
  6. GRB 090515: MMT/MMIRS NIR Upper Limit
  7. GRB 090515: Swift/UVOT Observations
  8. GRB 090515: Swift-XRT refined analysis
  9. GRB 090515: Enhanced Swift-XRT position
  10. GRB 090515: Swift-BAT refined spectral analysis
  11. GRB 090515: Swift-BAT refined analysis
  12. GRB 090515: Gemini-N upper limit
  13. GRB 090515: WIYN NIR Upper Limit
  14. GRB 090515: Super-LOTIS Upper Limits
  15. GRB 090515: PAIRITEL Upper Limits
  16. GRB 090515: KAIT optical upper limits
  17. GRB 090515: ROTSE-III Optical Limits
  18. GRB 090515: Swift detection of a short burst


Download all Circulars as a .tar.gz archive:
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