TITLE:   GCN CIRCULAR
NUMBER:  30015
SUBJECT: GRB 210515A: Fermi GBM Final Real-time Localization
DATE:    21/05/15 13:17:09 GMT
FROM:    Fermi GBM Team at MSFC/Fermi-GBM  <do_not_reply@GIOC.nsstc.nasa.gov>

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

At 13:06:45 UT on 15 May 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210515A (trigger 642776810.702128 / 210515546).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 117.1, Dec = 77.3 (J2000 degrees, equivalent to J2000 07h 48m, 77d 17'), with a statistical uncertainty of 14.6 degrees.

The angle from the Fermi LAT boresight is 24.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210515546/quicklook/glg_skymap_all_bn210515546.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/bn210515546/quicklook/glg_healpix_all_bn210515546.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210515546/quicklook/glg_lc_medres34_bn210515546.gif