| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB210912522 |
|
| T0 |
12:31:31.476 UTC |
Fermi_GBM |
| ra |
338.2800° |
Fermi_GBM |
| decl |
21.1100° |
Fermi_GBM |
| pos_error |
9.35e+00° |
Fermi_GBM |
| T90 |
2.56 s |
Fermi_GBM |
| T90_error |
5.184 s |
Fermi_GBM |
| T90_start |
12:31:31.476 UTC |
Fermi_GBM |
| fluence |
1.78e-07 erg/cm² |
Fermi_GBM |
| fluence_error |
3.46e-08 erg/cm² |
Fermi_GBM |
| T100 |
2.56 s |
|
| GBM_located |
True |
|
| mjd |
59469.521892083336 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB210912522 |
| trigger_name |
bn210912522 |
| ra |
338.2800° |
| decl |
21.1100° |
| pos_error |
9.35e+00° |
| datum |
2021-09-12 |
| t_trigger |
12:31:34.292 UTC |
| T90 |
2.56 s |
| T90_error |
5.184 s |
| T90_start |
12:31:31.476 UTC |
| fluence |
1.78e-07 erg/cm² |
| fluence_error |
3.46e-08 erg/cm² |
| flux_1024 |
1.55e+00 erg/cm²/s |
| flux_1024_error |
1.87e-01 erg/cm²/s |
| flux_1024_time |
-1.98e+00 erg/cm²/s |
| flux_64 |
3.70e+00 erg/cm²/s |
| flux_64_error |
1.11e+00 erg/cm²/s |
| GCN 30821 table |
|---|
| GRB_name |
GRB210912B |
| GCN_number |
30821 |
| Detection_method |
Fermi GBM final loc |
| t_trigger |
12:31:34 UTC |
| ra |
344.9000° |
| decl |
24.6000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 30821
SUBJECT: GRB 210912B: Fermi GBM Final Real-time Localization
DATE: 21/09/12 12:38:51 GMT
FROM: Fermi GBM Team at MSFC/Fermi-GBM
The Fermi GBM team reports the detection of a likely LONG GRB
At 12:31:34 UT on 12 Sep 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210912B (trigger 653142699.29167 / 210912522).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 344.9, Dec = 24.6 (J2000 degrees, equivalent to J2000 22h 59m, 24d 36'), with a statistical uncertainty of 12.3 degrees.
The angle from the Fermi LAT boresight is 103.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210912522/quicklook/glg_skymap_all_bn210912522.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210912522/quicklook/glg_healpix_all_bn210912522.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210912522/quicklook/glg_lc_medres34_bn210912522.gif
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