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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 110818A: Fermi GBM observation
  2. GRB 110818A: Swift/UVOT Upper Limits
  3. GRB 110818A: Enhanced Swift-XRT position
  4. GRB 110818A: Optical afterglow and redshift from VLT/X-shooter
  5. GRB 110818A: Swift-XRT refined Analysis
  6. GRB 110818A, Swift-BAT refined analysis
  7. GRB 110818A: Swift detection of a burst

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Download all Circulars as a .tar.gz archive:
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A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

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