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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').

10 results found.

  1. GRB 070707: Swift-XRT follow-up observations
  2. Konus-Wind observation of GRB 070707
  3. GRB 070707: optical afterglow
  4. GRB 070707: object inside XRT error circle
  5. Swift XRT observation of GRB 070707
  6. GRB 070707: VLT observations
  7. INTEGRAL GRB 070707 is a short hard burst
  8. INTEGRAL GRB 070707 is a short hard burst
  9. GRB 070707: A long GRB detected by INTEGRAL
  10. GRB 070707: A long GRB detected by INTEGRAL

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