[vsnet-grb-info 27816] GRB 210501A: Fermi GBM Final Real-time Localization

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  29919
SUBJECT: GRB 210501A: Fermi GBM Final Real-time Localization
DATE:    21/05/01 05:05:20 GMT
FROM:    Fermi GBM Team at MSFC/Fermi-GBM  <do_not_reply at GIOC.nsstc.nasa.gov>

The Fermi GBM team reports the detection of a likely LONG GRB

At 04:55:00 UT on 1 May 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210501A (trigger 641537705.291634 / 210501205).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 357.8, Dec = -71.3 (J2000 degrees, equivalent to J2000 23h 51m, -71d 17'), with a statistical uncertainty of 11.7 degrees.

The angle from the Fermi LAT boresight is 49.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210501205/quicklook/glg_skymap_all_bn210501205.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210501205/quicklook/glg_healpix_all_bn210501205.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210501205/quicklook/glg_lc_medres34_bn210501205.gif