Skip to main content
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. 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').

17 results found.

  1. FACT follow-up of ANTARES-Fermi 191011A
  2. ANTARES 191011A: MASTER optical observation befor and after trigger
  3. ANTARES 191011A: AMON + ANTARES Identification of a High-Energy Neutrino + Fermi LAT Coincidence
  4. GRB 191011A: Swift-BAT refined analysis
  5. GRB 191011A: Swift/UVOT Detection
  6. GRB 191011A: RATIR Optical and NIR Observations
  7. GRB 191011A: Fermi GBM observation
  8. GRB 19011A: Optical Afterglow Detection with LCO
  9. GRB 191011A: Swift-XRT refined Analysis
  10. GRB 191011A: MASTER OT retraction.
  11. GRB 191011A: Enhanced Swift-XRT position
  12. GRB 191011A: correction of reported magnitudes
  13. GRB 191011A: BALROG localization (Fermi Trigger 592461363 / GRB 191011192)
  14. GRB 191011A: GROND Detection of the Optical/NIR afterglow
  15. GRB 191011A: VLT X-shooter redshift from RRM Observations
  16. GRB 191011A: Swift detection of a burst with an optical counterpart
  17. GRB 191011A: Fermi GBM Final Real-time Localization

Advanced

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