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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').

8 results found.

  1. GRB 191024A: Swift-BAT refined analysis
  2. GRB 191024A: Swift/UVOT Upper Limits
  3. GRB 191024A: Afterglow Upper Limits with LCO
  4. GRB 191024A: Swift-XRT refined Analysis
  5. GRB 191024A: VLT/X-shooter optical observations
  6. GRB 191024A: GROND early upper limits
  7. GRB 191024A: Enhanced Swift-XRT position
  8. GRB 191024A: Swift detection of a burst

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