| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB250321908 |
|
| T0 |
21:47:35.152 UTC |
Fermi_GBM |
| ra |
89.3500° |
Fermi_GBM |
| decl |
-28.4800° |
Fermi_GBM |
| pos_error |
5.33e+00° |
Fermi_GBM |
| T90 |
8.96 s |
Fermi_GBM |
| T90_error |
1.619 s |
Fermi_GBM |
| T90_start |
21:47:35.152 UTC |
Fermi_GBM |
| fluence |
8.90e-07 erg/cm² |
Fermi_GBM |
| fluence_error |
3.30e-08 erg/cm² |
Fermi_GBM |
| T100 |
8.96 s |
|
| GBM_located |
True |
|
| mjd |
60755.90804574074 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB250321908 |
| trigger_name |
bn250321908 |
| ra |
89.3500° |
| decl |
-28.4800° |
| pos_error |
5.33e+00° |
| datum |
2025-03-21 |
| t_trigger |
21:47:36.176 UTC |
| T90 |
8.96 s |
| T90_error |
1.619 s |
| T90_start |
21:47:35.152 UTC |
| fluence |
8.90e-07 erg/cm² |
| fluence_error |
3.30e-08 erg/cm² |
| flux_1024 |
1.89e+00 erg/cm²/s |
| flux_1024_error |
1.93e-01 erg/cm²/s |
| flux_1024_time |
-3.84e-01 erg/cm²/s |
| flux_64 |
3.81e+00 erg/cm²/s |
| flux_64_error |
1.02e+00 erg/cm²/s |
| GCN 39825 table |
|---|
| GRB_name |
GRB250321C |
| GCN_number |
39825 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
21:47:36 UTC |
| ra |
89.3000° |
| decl |
-28.5000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 39825
SUBJECT: GRB 250321C: Fermi GBM Final Real-time Localization
DATE: 25/03/21 21:57:57 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely LONG GRB
At 21:47:36 UT on 21 Mar 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250321C (trigger 764286461.175894 / 250321908).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 89.3, Dec = -28.5 (J2000 degrees, equivalent to J2000 05h 57m, -28d 30'), with a statistical uncertainty of 5.0 degrees.
The angle from the Fermi LAT boresight is 53.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250321908/quicklook/glg_skymap_all_bn250321908.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/bn250321908/quicklook/glg_healpix_all_bn250321908.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250321908/quicklook/glg_lc_medres34_bn250321908.gif
|