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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').

11 results found.

  1. GRB 230815A: ATCA detection of radio counterpart
  2. GRB 230815A: VLT/HAWK-I near-infrared afterglow detection
  3. GRB 230815A: SOAR/Goodman follow-up imaging
  4. GRB 230815A: Swift-BAT refined analysis
  5. GRB230815A: Swift/UVOT upper limits
  6. GRB 230815A: Swift-XRT refined Analysis
  7. GRB230815A: BOOTES-6/DPRT optical upper limit
  8. GRB 230815A: Fermi GBM detection
  9. Swift GRB 230815A: Global MASTER-Net observations report
  10. GRB 230815A: Enhanced Swift-XRT position
  11. GRB 230815A: Swift detection of a burst


Download all Circulars as a .tar.gz archive:
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