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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 201027A: MITSuME Akeno optical upper limits
  2. GRB 201027A: Swift-BAT refined analysis
  3. GRB 201027A: Swift/UVOT Upper Limits
  4. GRB 201027A: Swift-XRT refined Analysis
  5. GRB 201027A: 1.5m OSN optical upper limit
  6. GRB 201027A: Enhanced Swift-XRT position
  7. GRB 201027A: Swift detection of a burst

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