| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB250208211 |
|
| T0 |
5:03:59 UTC |
GCN_circulars,Fermi GBM final loc |
| ra |
191.4000° |
Fermi_GBM |
| decl |
-11.8200° |
Fermi_GBM |
| pos_error |
5.68e+00° |
Fermi_GBM |
| T90 |
52.225 s |
Fermi_GBM |
| T90_error |
1.145 s |
Fermi_GBM |
| T90_start |
5:04:01.094 UTC |
Fermi_GBM |
| fluence |
6.21e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
2.70e-08 erg/cm² |
Fermi_GBM |
| T100 |
54.319 s |
|
| GBM_located |
True |
|
| mjd |
60714.21109953704 |
GCN_circulars,Fermi GBM final loc |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB250208211 |
| trigger_name |
bn250208211 |
| ra |
191.4000° |
| decl |
-11.8200° |
| pos_error |
5.68e+00° |
| datum |
2025-02-08 |
| t_trigger |
5:03:59.558 UTC |
| T90 |
52.225 s |
| T90_error |
1.145 s |
| T90_start |
5:04:01.094 UTC |
| fluence |
6.21e-06 erg/cm² |
| fluence_error |
2.70e-08 erg/cm² |
| flux_1024 |
3.13e+00 erg/cm²/s |
| flux_1024_error |
2.02e-01 erg/cm²/s |
| flux_1024_time |
2.69e+01 erg/cm²/s |
| flux_64 |
4.75e+00 erg/cm²/s |
| flux_64_error |
8.97e-01 erg/cm²/s |
| GCN 39225 table |
|---|
| GRB_name |
GRB250208A |
| GCN_number |
39225 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
5:03:59 UTC |
| ra |
191.4000° |
| decl |
-11.8000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 39225
SUBJECT: GRB 250208A: Fermi GBM Final Real-time Localization
DATE: 25/02/08 05:14:47 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely LONG GRB
At 05:03:59 UT on 8 Feb 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250208A (trigger 760683844.557836 / 250208211).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 191.4, Dec = -11.8 (J2000 degrees, equivalent to J2000 12h 45m, -11d 48'), with a statistical uncertainty of 6.8 degrees.
The angle from the Fermi LAT boresight is 39.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250208211/quicklook/glg_skymap_all_bn250208211.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/bn250208211/quicklook/glg_healpix_all_bn250208211.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250208211/quicklook/glg_lc_medres34_bn250208211.gif
|