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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').

14 results found.

  1. GRB 131229A: Suzaku WAM observation of the prompt emission
  2. GRB 131229A: Fermi GBM detection
  3. Konus-Wind observation of GRB 131229A
  4. GRB 131229A: CARMA 3mm observations
  5. GRB 131229A: Magellan upper limit
  6. GRB 131229A: GROND observations
  7. GRB 131229A: Swift-BAT refined analysis
  8. GRB 131229A: Swift-XRT refined Analysis
  9. GRB 131229A: Swift/UVOT Upper Limits
  10. GRB 131229A: Enhanced Swift-XRT position
  11. GRB 131229A: Deep Gemini-South Imaging
  12. GRB 131229A: KAIT Optical Upper Limit
  13. GRB 131229A: P60 nondetection
  14. GRB 131229A: Swift detection of a burst

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