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GCN Circular 30754

GRB 210903B: Fermi GBM Final Localization
2021-09-03T16:37:03Z (3 years ago)
Joshua Wood at MSFC/Fermi-GBM <>
The Fermi GBM team reports the detection of a likely SHORT GRB

At 00:30:46.05 UT on 3 Sep 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210903B (trigger 652321851 / 210903021).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 270.9, Dec = +15.6 (J2000 degrees, equivalent to J2000 18h 03m, +15d 36'), with a statistical uncertainty of 26.1 degrees.

The angle from the Fermi LAT boresight is 66.0 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:
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