Skip to main content
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 27887

GRB 200604A: Fermi GBM Final Real-time Localization
2020-06-04T20:10:21Z (4 years ago)
Fermi GBM Team at MSFC/Fermi-GBM <>
The Fermi GBM team reports the detection of a likely LONG GRB

At 20:00:05 UT on 4 Jun 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200604A (trigger 612993610.010234 / 200604833).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 179.5, Dec = -3.9 (J2000 degrees, equivalent to J2000 11h 58m, -3d 53'), with a statistical uncertainty of 10.1 degrees.

The angle from the Fermi LAT boresight is 54.0 degrees.

The skymap can be found here:

The HEALPix FITS file, including the estimated localization systematic, can be found here:

The GBM light curve can be found here:
Looking for U.S. government information and services? Visit