Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. 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. Konus-Wind detection of GRB 220826A
  2. IceCube-Cascade 220826A: Upper limits from a search for additional neutrino events in IceCube
  3. GRB 220826A: Swift-BAT refined analysis
  4. GRB 220826A: Fermi GBM observation
  5. GRB 220826A: Swift-XRT refined Analysis
  6. GRB 220826A: Lesedi optical afterglow detection
  7. GRB 220826A: Swift/UVOT Detection
  8. GRB 220826A: iTelescope optical afterglow observations
  9. Swift GRB 220826A: Global MASTER-Net observations report
  10. GRB 220826A: Enhanced Swift-XRT position
  11. GRB 220826A: 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