Skip to main content
New Swift-BAT/GUANO and IceCube Notice Types Available! See news and announcements

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 130609B: Suzaku WAM observation of the prompt emission
  2. GRB 130609B: Theoretical redshift estimation
  3. GRB 130609B: Fermi GBM observation
  4. GRB 130609B, Further Swift-BAT refined analysis
  5. GRB 130609B: GROND observations
  6. GRB 130609B, Swift-BAT refined analysis
  7. GRB 130609B: Swift/UVOT Observations
  8. Konus-Wind observation of GRB 130609B
  9. GRB 130609B: Swift-XRT refined Analysis
  10. GRB 130609B: Enhanced Swift-XRT position
  11. GRB 130609B: Swift detection of a burst with an optical counterpart

Advanced

Download all Circulars as a .tar.gz archive:
Looking for U.S. government information and services? Visit USA.gov