| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090126227 |
|
| T0 |
5:26:20.442 UTC |
Fermi_GBM |
| ra |
189.2000° |
Fermi_GBM |
| decl |
34.1000° |
Fermi_GBM |
| pos_error |
6.78e+00° |
Fermi_GBM |
| T90 |
5.632 s |
Fermi_GBM |
| T90_error |
0.81 s |
Fermi_GBM |
| T90_start |
5:26:20.442 UTC |
Fermi_GBM |
| fluence |
1.10e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
2.02e-08 erg/cm² |
Fermi_GBM |
| T100 |
5.632 s |
|
| GBM_located |
True |
|
| mjd |
54857.22662548611 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090126227 |
| trigger_name |
bn090126227 |
| ra |
189.2000° |
| decl |
34.1000° |
| pos_error |
6.78e+00° |
| datum |
2009-01-26 |
| t_trigger |
5:26:22.234 UTC |
| T90 |
5.632 s |
| T90_error |
0.81 s |
| T90_start |
5:26:20.442 UTC |
| fluence |
1.10e-06 erg/cm² |
| fluence_error |
2.02e-08 erg/cm² |
| flux_1024 |
4.02e+00 erg/cm²/s |
| flux_1024_error |
1.81e-01 erg/cm²/s |
| flux_1024_time |
-3.84e-01 erg/cm²/s |
| flux_64 |
5.52e+00 erg/cm²/s |
| flux_64_error |
7.79e-01 erg/cm²/s |
| GCN 8853 table |
|---|
| GRB_name |
GRB090126B |
| GCN_number |
8853 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
5:26:22.230 UTC |
| ra |
190.5000° |
| decl |
33.2000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8853
SUBJECT: GRB 090126B: Fermi GBM detection
DATE: 09/01/26 16:31:43 GMT
FROM: Andreas von Kienlin at MPE
A. von Kienlin (MPE) reports on behalf of the Fermi GBM Team:
"At 05:26:22.23 UT on 26 January 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090126B (trigger 254640384 / 090126227 ).
The on-ground calculated location, using the GBM trigger
data, is RA = 190.5, DEC = 33.2 (J2000 degrees,
equivalent to 19h 42m, 33d 12'), with an uncertainty
of 4.4 degrees (radius, 1-sigma containment,
statistical only; there is additionally a systematic
error which is currently estimated to be 2 to 3 degrees).
The angle from the Fermi LAT boresight is 18 degrees.
The GBM light curve consists of a single peak
with a duration (T90) of about 10.8 s (8-1000 keV).
The time-averaged spectrum from T0-4.608 s to T0+5.632 s is
best fit by a power law function with an exponential
high energy cutoff. The power law index is -0.99 +/- 0.18 and
the cutoff energy, parameterized as Epeak, is 47.5 +/- 3.4 keV
(chi squared 404.17 for 360 d.o.f.).
The event fluence (8-1000 keV) in this time interval is
(1.25 +/- 0.24)E-06 erg/cm^2. The 1-sec peak photon flux measured
starting from T0-0.512 s in the 8-1000 keV band
is 4.9 +/- 1.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|