| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB230425230 |
|
| T0 |
5:30:39 UTC |
GCN_circulars,Fermi GBM final loc |
| ra |
150.6800° |
Fermi_GBM |
| decl |
-33.8700° |
Fermi_GBM |
| T90 |
0.528 s |
Fermi_GBM |
| T90_error |
0.74 s |
Fermi_GBM |
| T90_start |
5:30:39.344 UTC |
Fermi_GBM |
| fluence |
7.93e-08 erg/cm² |
Fermi_GBM |
| fluence_error |
2.00e-08 erg/cm² |
Fermi_GBM |
| T100 |
0.872 s |
|
| GBM_located |
True |
|
| mjd |
60059.22961805556 |
GCN_circulars,Fermi GBM final loc |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB230425230 |
| trigger_name |
bn230425230 |
| ra |
150.6800° |
| decl |
-33.8700° |
| datum |
2023-04-25 |
| t_trigger |
5:30:39.360 UTC |
| T90 |
0.528 s |
| T90_error |
0.74 s |
| T90_start |
5:30:39.344 UTC |
| fluence |
7.93e-08 erg/cm² |
| fluence_error |
2.00e-08 erg/cm² |
| flux_1024 |
9.03e-01 erg/cm²/s |
| flux_1024_error |
2.02e-01 erg/cm²/s |
| flux_1024_time |
-6.40e-02 erg/cm²/s |
| flux_64 |
5.73e+00 erg/cm²/s |
| flux_64_error |
8.52e-01 erg/cm²/s |
| GCN 33682 table |
|---|
| GRB_name |
GRB230425A |
| GCN_number |
33682 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
5:30:39 UTC |
| ra |
150.7000° |
| decl |
-33.9000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 33682
SUBJECT: GRB 230425A: Fermi GBM Final Real-time Localization
DATE: 23/04/25 14:30:19 GMT
FROM: Joe Mangan at IJCLab
The Fermi GBM team reports the detection of a likely SHORT GRB
At 05:30:39 UT on 25 Apr 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230425A (trigger 704093444 / 230425230).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 150.7 Dec = -33.9 (J2000 degrees, equivalent to J2000 10h 02m, 33d 54'), with a statistical uncertainty of 11.5 degrees.
The angle from the Fermi LAT boresight is 74 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230425230/quicklook/glg_skymap_all_bn230425230.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/bn230425230/quicklook/glg_healpix_all_bn230425230.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230425230/quicklook/glg_lc_medres34_bn230425230.gif |