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GCN Circular 31914

Subject
GRB 220418A: Fermi GBM Final Real-time Localization
Date
2022-04-18T16:03:22Z (2 years ago)
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 15:51:58 UT on 18 Apr 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220418A (trigger 671989923.878466 / 220418661).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 334.3, Dec = 62.0 (J2000 degrees, equivalent to J2000 22h 17m, 62d 00'), with a statistical uncertainty of 7.8 degrees.

The angle from the Fermi LAT boresight is 18.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220418661/quicklook/glg_skymap_all_bn220418661.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220418661/quicklook/glg_healpix_all_bn220418661.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220418661/quicklook/glg_lc_medres34_bn220418661.gif
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