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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').

17 results found.

  1. GRB 090812: Skynet/PROMPT and GORT Observations
  2. GRB 090812: Konus-Wind and Swift/BAT joint spectral analysis
  3. GRB 090812: Suzaku WAM observation of the prompt emission
  4. VLA radio non-detection of GRB 090812
  5. GRB 090812: WIRO NIR upper limit
  6. GRB 090812: Faulkes Telescope South Continued Optical Monitoring
  7. GRB 090812: RAPTOR detections during the burst
  8. GRB 090812: Swift XRT refined analysis
  9. GRB 090812, RIMOTS optical upper limits
  10. GRB 090812 Swift-BAT Refined Analysis
  11. GRB090812: Swift/UVOT observations
  12. GRB 090812: GROND Observations of the Optical/NIR Afterglow
  13. GRB 090812: Enhanced Swift-XRT position
  14. GRB 090812 VLT redshift
  15. GRB 090812: Liverpool Telescope afterglow confirmation
  16. GRB 090812: P60 Confirmation of Optical Afterglow
  17. GRB 090812: Swift detection of a burst with an optical counterpart

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