| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB250416588 |
|
| T0 |
14:06:21 UTC |
GCN_circulars,Fermi GBM final loc |
| ra |
323.8000° |
Fermi_GBM |
| decl |
70.4900° |
Fermi_GBM |
| T90 |
22.784 s |
Fermi_GBM |
| T90_error |
1.056 s |
Fermi_GBM |
| T90_start |
14:06:25.497 UTC |
Fermi_GBM |
| fluence |
3.80e-05 erg/cm² |
Fermi_GBM |
| fluence_error |
6.71e-08 erg/cm² |
Fermi_GBM |
| T100 |
27.281 s |
|
| GBM_located |
True |
|
| mjd |
60781.587743055556 |
GCN_circulars,Fermi GBM final loc |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB250416588 |
| trigger_name |
bn250416588 |
| ra |
323.8000° |
| decl |
70.4900° |
| datum |
2025-04-16 |
| t_trigger |
14:06:21.401 UTC |
| T90 |
22.784 s |
| T90_error |
1.056 s |
| T90_start |
14:06:25.497 UTC |
| fluence |
3.80e-05 erg/cm² |
| fluence_error |
6.71e-08 erg/cm² |
| flux_1024 |
7.79e+00 erg/cm²/s |
| flux_1024_error |
3.19e-01 erg/cm²/s |
| flux_1024_time |
1.41e+01 erg/cm²/s |
| flux_64 |
1.11e+01 erg/cm²/s |
| flux_64_error |
1.31e+00 erg/cm²/s |
| GCN 40149 table |
|---|
| GRB_name |
GRB250416A |
| GCN_number |
40149 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
14:06:21 UTC |
| ra |
323.8000° |
| decl |
70.5000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 40149
SUBJECT: GRB 250416A: Fermi GBM Final Real-time Localization
DATE: 25/04/16 14:17:00 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely LONG GRB
At 14:06:21 UT on 16 Apr 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250416A (trigger 766505186.401302 / 250416588).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 323.8, Dec = 70.5 (J2000 degrees, equivalent to J2000 21h 35m, 70d 30'), with a statistical uncertainty of 1.0 degrees.
The angle from the Fermi LAT boresight is 111.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250416588/quicklook/glg_skymap_all_bn250416588.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/bn250416588/quicklook/glg_healpix_all_bn250416588.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250416588/quicklook/glg_lc_medres34_bn250416588.gif
|
| GCN 40155 table |
|---|
| GRB_name |
GRB250416A |
| GCN_number |
40155 |
| Detection_method |
Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 40155
SUBJECT: Fermi Gamma-ray Burst Monitor trigger 766505186/250416588 (GRB 250416A) is not a GRB
DATE: 25/04/17 04:59:28 GMT
FROM: Lorenzo Scotton at UAH
L. Scotton (UAH) and O. Mukherjee (USRA) report on behalf of
the Fermi Gamma-ray Burst Monitor Team:
"The Fermi Gamma-ray Burst Monitor (GBM) trigger 766505186/250416588 at 14:06:21.40 UT
on 16 April 2025, tentatively classified as a GRB, is in fact not due
to a GRB. This trigger is likely due to distant particles." |