| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB230731986 |
|
| T0 |
23:39:12.337 UTC |
Fermi_GBM |
| ra |
237.3100° |
Fermi_GBM |
| decl |
-58.9100° |
Fermi_GBM |
| pos_error |
6.60e+00° |
Fermi_GBM |
| T90 |
10.496 s |
Fermi_GBM |
| T90_error |
3.566 s |
Fermi_GBM |
| T90_start |
23:39:12.337 UTC |
Fermi_GBM |
| fluence |
1.21e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
6.00e-08 erg/cm² |
Fermi_GBM |
| T100 |
10.496 s |
|
| GBM_located |
True |
|
| mjd |
60156.98555945602 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB230731986 |
| trigger_name |
bn230731986 |
| ra |
237.3100° |
| decl |
-58.9100° |
| pos_error |
6.60e+00° |
| datum |
2023-07-31 |
| t_trigger |
23:39:16.433 UTC |
| T90 |
10.496 s |
| T90_error |
3.566 s |
| T90_start |
23:39:12.337 UTC |
| fluence |
1.21e-06 erg/cm² |
| fluence_error |
6.00e-08 erg/cm² |
| flux_1024 |
2.24e+00 erg/cm²/s |
| flux_1024_error |
3.15e-01 erg/cm²/s |
| flux_1024_time |
-1.15e+00 erg/cm²/s |
| flux_64 |
4.40e+00 erg/cm²/s |
| flux_64_error |
1.34e+00 erg/cm²/s |
| GCN 34305 table |
|---|
| GRB_name |
GRB230731A |
| GCN_number |
34305 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
23:39:16 UTC |
| ra |
237.3000° |
| decl |
-58.9000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 34305
SUBJECT: GRB 230731A: Fermi GBM Final Real-time Localization
DATE: 23/07/31 23:49:46 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely LONG GRB
At 23:39:16 UT on 31 Jul 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230731A (trigger 712539561.432998 / 230731986).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 237.3, Dec = -58.9 (J2000 degrees, equivalent to J2000 15h 49m, -58d 53'), with a statistical uncertainty of 8.3 degrees.
The angle from the Fermi LAT boresight is 111.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230731986/quicklook/glg_skymap_all_bn230731986.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/bn230731986/quicklook/glg_healpix_all_bn230731986.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230731986/quicklook/glg_lc_medres34_bn230731986.gif
|