| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB250529457 |
|
| T0 |
10:58:20.477 UTC |
Fermi_GBM |
| ra |
149.1000° |
Fermi_GBM |
| decl |
71.6100° |
Fermi_GBM |
| pos_error |
3.21e+00° |
Fermi_GBM |
| T90 |
49.665 s |
Fermi_GBM |
| T90_error |
2.521 s |
Fermi_GBM |
| T90_start |
10:58:20.477 UTC |
Fermi_GBM |
| fluence |
3.45e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
3.36e-08 erg/cm² |
Fermi_GBM |
| T100 |
49.665 s |
|
| GBM_located |
True |
|
| mjd |
60824.457181446756 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB250529457 |
| trigger_name |
bn250529457 |
| ra |
149.1000° |
| decl |
71.6100° |
| pos_error |
3.21e+00° |
| datum |
2025-05-29 |
| t_trigger |
10:58:24.317 UTC |
| T90 |
49.665 s |
| T90_error |
2.521 s |
| T90_start |
10:58:20.477 UTC |
| fluence |
3.45e-06 erg/cm² |
| fluence_error |
3.36e-08 erg/cm² |
| flux_1024 |
3.36e+00 erg/cm²/s |
| flux_1024_error |
3.44e-01 erg/cm²/s |
| flux_1024_time |
2.30e+00 erg/cm²/s |
| flux_64 |
6.49e+00 erg/cm²/s |
| flux_64_error |
1.93e+00 erg/cm²/s |
| GCN 40571 table |
|---|
| GRB_name |
GRB250529B |
| GCN_number |
40571 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
10:58:24 UTC |
| ra |
149.1000° |
| decl |
71.6000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 40571
SUBJECT: GRB 250529B: Fermi GBM Final Real-time Localization
DATE: 25/05/29 11:08:59 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely LONG GRB
At 10:58:24 UT on 29 May 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250529B (trigger 770209109.316756 / 250529457).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 149.1, Dec = 71.6 (J2000 degrees, equivalent to J2000 09h 56m, 71d 35'), with a statistical uncertainty of 2.9 degrees.
The angle from the Fermi LAT boresight is 121.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250529457/quicklook/glg_skymap_all_bn250529457.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/bn250529457/quicklook/glg_healpix_all_bn250529457.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250529457/quicklook/glg_lc_medres34_bn250529457.gif
|