| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB250223679 |
|
| T0 |
16:18:16.591 UTC |
Fermi_GBM |
| ra |
262.6200° |
Fermi_GBM |
| decl |
41.0400° |
Fermi_GBM |
| pos_error |
3.92e+00° |
Fermi_GBM |
| T90 |
33.281 s |
Fermi_GBM |
| T90_error |
2.187 s |
Fermi_GBM |
| T90_start |
16:18:16.591 UTC |
Fermi_GBM |
| fluence |
1.78e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
2.33e-08 erg/cm² |
Fermi_GBM |
| T100 |
33.281 s |
|
| GBM_located |
True |
|
| mjd |
60729.67935869213 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB250223679 |
| trigger_name |
bn250223679 |
| ra |
262.6200° |
| decl |
41.0400° |
| pos_error |
3.92e+00° |
| datum |
2025-02-23 |
| t_trigger |
16:18:20.175 UTC |
| T90 |
33.281 s |
| T90_error |
2.187 s |
| T90_start |
16:18:16.591 UTC |
| fluence |
1.78e-06 erg/cm² |
| fluence_error |
2.33e-08 erg/cm² |
| flux_1024 |
2.53e+00 erg/cm²/s |
| flux_1024_error |
1.87e-01 erg/cm²/s |
| flux_1024_time |
1.66e+01 erg/cm²/s |
| flux_64 |
3.50e+00 erg/cm²/s |
| flux_64_error |
9.55e-01 erg/cm²/s |
| GCN 39459 table |
|---|
| GRB_name |
GRB250223C |
| GCN_number |
39459 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
16:18:20 UTC |
| ra |
262.6000° |
| decl |
41.0000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 39459
SUBJECT: GRB 250223C: Fermi GBM Final Real-time Localization
DATE: 25/02/24 17:27:23 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely LONG GRB
At 16:18:20 UT on 23 Feb 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250223C (trigger 762020305.175056 / 250223679).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 262.6, Dec = 41.0 (J2000 degrees, equivalent to J2000 17h 30m, 41d 00'), with a statistical uncertainty of 5.1 degrees.
The angle from the Fermi LAT boresight is 41.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250223679/quicklook/glg_skymap_all_bn250223679.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/bn250223679/quicklook/glg_healpix_all_bn250223679.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250223679/quicklook/glg_lc_medres34_bn250223679.gif
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