Skip to main content
Announcing GCN Classic Migration Survey, End of Legacy Circulars Email. 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').

15 results found.

  1. LIGO/Virgo S190512at: SVOM/GWAC-F60A observations
  2. LIGO/Virgo S190512at: Updated sky localization
  3. LIGO/Virgo S190512at: CALET Observations
  4. LIGO/Virgo S190512at: Insight-HXMT/HE observation
  5. LIGO-Virgo S190512at: AGILE GRID observations
  6. LIGO/Virgo S190512at: Swift/BAT Counterpart Search
  7. LIGO/Virgo S190512at: ANTARES neutrino search
  8. LIGO/Virgo S190512at: Fermi-LAT search for a high-energy gamma-ray counterpart
  9. LIGO/Virgo S190512at: MAXI/GSC Observations
  10. LIGO/Virgo S190512at: Fermi GBM Observations
  11. LIGO/Virgo S190512at Global MASTER-Net observations report
  12. LIGO/Virgo S190512at: INTEGRAL inactive at the time of the event
  13. LIGO-Virgo S190512at: AGILE MCAL observations
  14. LIGO/Virgo S190512at: IceCube Neutrino Search
  15. LIGO/Virgo S190512at: Identification of a GW compact binary merger candidate

Advanced

Download all Circulars as a .tar.gz archive:
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

gcn.nasa.gov

A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

Looking for U.S. government information and services? Visit USA.gov