| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
15:46:42 UTC |
GCN_circulars,Fermi GBM final loc |
| ra |
103.8000° |
GCN_circulars,Fermi GBM final loc |
| decl |
-62.2000° |
GCN_circulars,Fermi GBM final loc |
| GBM_located |
True |
|
| mjd |
60781.657430555555 |
GCN_circulars,Fermi GBM final loc |
| GCN 40150 table |
|---|
| GRB_name |
GRB250416B |
| GCN_number |
40150 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
15:46:42 UTC |
| ra |
103.8000° |
| decl |
-62.2000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 40150
SUBJECT: GRB 250416B: Fermi GBM Final Real-time Localization
DATE: 25/04/16 15:57:09 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely LONG GRB
At 15:46:42 UT on 16 Apr 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250416B (trigger 766511207.410564 / 250416657).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 103.8, Dec = -62.2 (J2000 degrees, equivalent to J2000 06h 55m, -62d 12'), with a statistical uncertainty of 1.0 degrees.
The angle from the Fermi LAT boresight is 166.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250416657/quicklook/glg_skymap_all_bn250416657.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250416657/quicklook/glg_healpix_all_bn250416657.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250416657/quicklook/glg_lc_medres34_bn250416657.gif
|