Skip to main content
Due to the lapse in federal government funding, NASA is not updating this website. See the Operations FAQ for GCN impacts.
New! Super-Kamiokande JSON Notices and Schema v4.5.0. See news and announcements

GCN Circular 40581

Subject
Fermi Gamma-ray Burst Monitor trigger 770296643/250530470 is not a GRB
Event
GRB 250530B
Date
2025-05-30T14:00:40Z (4 months ago)
Edited On
2025-05-30T15:40:37Z (4 months ago)
From
Peter Veres at University of Alabama in Huntsville <veresp@gmail.com>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov>
Via
Web form
"The Fermi Gamma-ray Burst Monitor (GBM) trigger 770296643/250530470 at 11:17:18.008 UT
on 30 May 2025, tentatively classified as a GRB, is in fact not due to a GRB.
This trigger is likely due a particle event."
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