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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').

7 results found.

  1. GRB 101117B: GROND Upper limits
  2. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  3. GRB 101117B: Swift-XRT refined analysis
  4. GRB 101117B: Swift-BAT refined analysis
  5. GRB 101117B: Enhanced Swift-XRT position
  6. GRB 101117B: Swift/UVOT Discovery of an Optical Afterglow
  7. GRB 101117B: Swift detection of a burst

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