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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').

6 results found.

  1. GRB 080515: NIR magnitude correction
  2. GRB 080515: KPNO 4m NIR afterglow detection
  3. GRB 080515: Swift-XRT position and analysis
  4. Konus-Wind observation of GRB 080513
  5. GRB 080515, Swift-BAT refined analysis
  6. GRB 080515: Swift detection of a burst

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