| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB191221802 |
|
| T0 |
19:14:28 UTC |
GCN_circulars,Fermi GBM final loc |
| ra |
40.8300° |
Fermi_GBM |
| decl |
-43.0400° |
Fermi_GBM |
| pos_error |
4.99e+00° |
Fermi_GBM |
| T90 |
2.24 s |
Fermi_GBM |
| T90_error |
0.781 s |
Fermi_GBM |
| T90_start |
19:14:28.780 UTC |
Fermi_GBM |
| fluence |
4.63e-07 erg/cm² |
Fermi_GBM |
| fluence_error |
2.50e-08 erg/cm² |
Fermi_GBM |
| T100 |
3.02 s |
|
| GBM_located |
True |
|
| mjd |
58838.801712962966 |
GCN_circulars,Fermi GBM final loc |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB191221802 |
| trigger_name |
bn191221802 |
| ra |
40.8300° |
| decl |
-43.0400° |
| pos_error |
4.99e+00° |
| datum |
2019-12-21 |
| t_trigger |
19:14:28.844 UTC |
| T90 |
2.24 s |
| T90_error |
0.781 s |
| T90_start |
19:14:28.780 UTC |
| fluence |
4.63e-07 erg/cm² |
| fluence_error |
2.50e-08 erg/cm² |
| flux_1024 |
1.76e+00 erg/cm²/s |
| flux_1024_error |
2.57e-01 erg/cm²/s |
| flux_1024_time |
-6.40e-02 erg/cm²/s |
| flux_64 |
6.38e+00 erg/cm²/s |
| flux_64_error |
1.27e+00 erg/cm²/s |
| GCN 26532 table |
|---|
| GRB_name |
GRB191221A |
| GCN_number |
26532 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
19:14:28 UTC |
| ra |
40.8000° |
| decl |
-43.0000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 26532
SUBJECT: GRB 191221A: Fermi GBM Final Real-time Localization
DATE: 19/12/21 19:24:53 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely SHORT GRB
At 19:14:28 UT on 21 Dec 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 191221A (trigger 598648473.844298 / 191221802).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 40.8, Dec = -43.0 (J2000 degrees, equivalent to J2000 02h 43m, -43d 00'), with a statistical uncertainty of 5.9 degrees.
The angle from the Fermi LAT boresight is 21.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191221802/quicklook/glg_skymap_all_bn191221802.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191221802/quicklook/glg_healpix_all_bn191221802.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn191221802/quicklook/glg_lc_medres34_bn191221802.gif
|