| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB221228204 |
|
| T0 |
4:53:14 UTC |
GCN_circulars,Fermi GBM final loc |
| ra |
290.2100° |
Fermi_GBM |
| decl |
13.8300° |
Fermi_GBM |
| pos_error |
5.24e+00° |
Fermi_GBM |
| T90 |
86.274 s |
Fermi_GBM |
| T90_error |
1.056 s |
Fermi_GBM |
| T90_start |
4:53:15.308 UTC |
Fermi_GBM |
| fluence |
5.85e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
3.56e-08 erg/cm² |
Fermi_GBM |
| T100 |
87.582 s |
|
| GBM_located |
True |
|
| mjd |
59941.20363425926 |
GCN_circulars,Fermi GBM final loc |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB221228204 |
| trigger_name |
bn221228204 |
| ra |
290.2100° |
| decl |
13.8300° |
| pos_error |
5.24e+00° |
| datum |
2022-12-28 |
| t_trigger |
4:53:14.796 UTC |
| T90 |
86.274 s |
| T90_error |
1.056 s |
| T90_start |
4:53:15.308 UTC |
| fluence |
5.85e-06 erg/cm² |
| fluence_error |
3.56e-08 erg/cm² |
| flux_1024 |
2.75e+00 erg/cm²/s |
| flux_1024_error |
2.03e-01 erg/cm²/s |
| flux_1024_time |
1.92e+00 erg/cm²/s |
| flux_64 |
4.59e+00 erg/cm²/s |
| flux_64_error |
9.22e-01 erg/cm²/s |
| GCN 33116 table |
|---|
| GRB_name |
GRB221228A |
| GCN_number |
33116 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
4:53:14 UTC |
| ra |
290.2000° |
| decl |
13.8000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 33116
SUBJECT: GRB 221228A: Fermi GBM Final Real-time Localization
DATE: 22/12/28 05:03:37 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely LONG GRB
At 04:53:14 UT on 28 Dec 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 221228A (trigger 693895999.795578 / 221228204).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 290.2, Dec = 13.8 (J2000 degrees, equivalent to J2000 19h 20m, 13d 48'), with a statistical uncertainty of 5.4 degrees.
The angle from the Fermi LAT boresight is 46.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221228204/quicklook/glg_skymap_all_bn221228204.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221228204/quicklook/glg_healpix_all_bn221228204.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221228204/quicklook/glg_lc_medres34_bn221228204.gif
|