| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB230921112 |
|
| T0 |
2:41:32 UTC |
GCN_circulars,Fermi GBM final loc |
| ra |
239.4200° |
Fermi_GBM |
| decl |
-33.4400° |
Fermi_GBM |
| pos_error |
4.92e+00° |
Fermi_GBM |
| T90 |
108.546 s |
Fermi_GBM |
| T90_error |
1.145 s |
Fermi_GBM |
| T90_start |
2:41:34.407 UTC |
Fermi_GBM |
| fluence |
1.02e-05 erg/cm² |
Fermi_GBM |
| fluence_error |
5.54e-08 erg/cm² |
Fermi_GBM |
| T100 |
110.953 s |
|
| GBM_located |
True |
|
| mjd |
60208.112175925926 |
GCN_circulars,Fermi GBM final loc |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB230921112 |
| trigger_name |
bn230921112 |
| ra |
239.4200° |
| decl |
-33.4400° |
| pos_error |
4.92e+00° |
| datum |
2023-09-21 |
| t_trigger |
2:41:32.615 UTC |
| T90 |
108.546 s |
| T90_error |
1.145 s |
| T90_start |
2:41:34.407 UTC |
| fluence |
1.02e-05 erg/cm² |
| fluence_error |
5.54e-08 erg/cm² |
| flux_1024 |
3.74e+00 erg/cm²/s |
| flux_1024_error |
2.87e-01 erg/cm²/s |
| flux_1024_time |
3.96e+01 erg/cm²/s |
| flux_64 |
6.06e+00 erg/cm²/s |
| flux_64_error |
1.32e+00 erg/cm²/s |
| GCN 34754 table |
|---|
| GRB_name |
GRB230921A |
| GCN_number |
34754 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
2:41:32 UTC |
| ra |
239.4000° |
| decl |
-33.4000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 34754
SUBJECT: GRB 230921A: Fermi GBM Final Real-time Localization
DATE: 23/09/21 02:51:55 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely LONG GRB
At 02:41:32 UT on 21 Sep 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230921A (trigger 716956897.615146 / 230921112).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 239.4, Dec = -33.4 (J2000 degrees, equivalent to J2000 15h 57m, -33d 23'), with a statistical uncertainty of 6.9 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/2023/bn230921112/quicklook/glg_skymap_all_bn230921112.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230921112/quicklook/glg_healpix_all_bn230921112.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230921112/quicklook/glg_lc_medres34_bn230921112.gif
|