| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB250522918 |
|
| T0 |
22:01:59 UTC |
GCN_circulars,Fermi GBM final loc |
| ra |
37.2900° |
Fermi_GBM |
| decl |
-5.4400° |
Fermi_GBM |
| pos_error |
1.04e+01° |
Fermi_GBM |
| T90 |
0.256 s |
Fermi_GBM |
| T90_error |
1.159 s |
Fermi_GBM |
| T90_start |
22:01:59.716 UTC |
Fermi_GBM |
| fluence |
3.99e-07 erg/cm² |
Fermi_GBM |
| fluence_error |
7.12e-09 erg/cm² |
Fermi_GBM |
| T100 |
0.972 s |
|
| GBM_located |
True |
|
| mjd |
60817.91804398148 |
GCN_circulars,Fermi GBM final loc |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB250522918 |
| trigger_name |
bn250522918 |
| ra |
37.2900° |
| decl |
-5.4400° |
| pos_error |
1.04e+01° |
| datum |
2025-05-22 |
| t_trigger |
22:01:59.780 UTC |
| T90 |
0.256 s |
| T90_error |
1.159 s |
| T90_start |
22:01:59.716 UTC |
| fluence |
3.99e-07 erg/cm² |
| fluence_error |
7.12e-09 erg/cm² |
| flux_1024 |
1.36e+00 erg/cm²/s |
| flux_1024_error |
1.81e-01 erg/cm²/s |
| flux_1024_time |
-4.48e-01 erg/cm²/s |
| flux_64 |
5.82e+00 erg/cm²/s |
| flux_64_error |
8.36e-01 erg/cm²/s |
| GCN 40529 table |
|---|
| GRB_name |
GRB250522A |
| GCN_number |
40529 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
22:01:59 UTC |
| ra |
37.3000° |
| decl |
-5.4000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 40529
SUBJECT: GRB 250522A: Fermi GBM Final Real-time Localization
DATE: 25/05/22 22:12:30 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely SHORT GRB
At 22:01:59 UT on 22 May 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250522A (trigger 769644124.77991 / 250522918).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 37.3, Dec = -5.4 (J2000 degrees, equivalent to J2000 02h 29m, -5d 24'), with a statistical uncertainty of 16.9 degrees.
The angle from the Fermi LAT boresight is 60.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250522918/quicklook/glg_skymap_all_bn250522918.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/bn250522918/quicklook/glg_healpix_all_bn250522918.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250522918/quicklook/glg_lc_medres34_bn250522918.gif
|