| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090426066 |
|
| T0 |
1:35:33.433 UTC |
Fermi_GBM |
| ra |
17.6000° |
Fermi_GBM |
| decl |
-19.2000° |
Fermi_GBM |
| pos_error |
9.09e+00° |
Fermi_GBM |
| T90 |
16.128 s |
Fermi_GBM |
| T90_error |
5.152 s |
Fermi_GBM |
| T90_start |
1:35:33.433 UTC |
Fermi_GBM |
| fluence |
6.77e-07 erg/cm² |
Fermi_GBM |
| fluence_error |
4.37e-08 erg/cm² |
Fermi_GBM |
| T100 |
16.128 s |
|
| GBM_located |
True |
|
| mjd |
54947.06635917824 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090426066 |
| trigger_name |
bn090426066 |
| ra |
17.6000° |
| decl |
-19.2000° |
| pos_error |
9.09e+00° |
| datum |
2009-04-26 |
| t_trigger |
1:35:35.225 UTC |
| T90 |
16.128 s |
| T90_error |
5.152 s |
| T90_start |
1:35:33.433 UTC |
| fluence |
6.77e-07 erg/cm² |
| fluence_error |
4.37e-08 erg/cm² |
| flux_1024 |
2.03e+00 erg/cm²/s |
| flux_1024_error |
1.82e-01 erg/cm²/s |
| flux_1024_time |
-1.79e+00 erg/cm²/s |
| flux_64 |
3.21e+00 erg/cm²/s |
| flux_64_error |
8.62e-01 erg/cm²/s |
| GCN 9299 table |
|---|
| GRB_name |
GRB090426B |
| GCN_number |
9299 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
1:35:35.230 UTC |
| ra |
17.6000° |
| decl |
-19.2000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9299
SUBJECT: GRB 090426B: Fermi GBM detection/observation
DATE: 09/04/29 20:19:46 GMT
FROM: Michael S. Briggs at UAH and MSFC
M. S. Briggs (UAH) reports on behalf of the Fermi GBM Team:
"At 01:35:35.23 UT on 26 April 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090426B (trigger 262402537 / 090426066).
The on-ground calculated location, using the GBM trigger
data, is RA = 17.6, DEC = -19.2 (J2000 degrees,
equivalent to 01 h 10 m, -19 d 12'), with an uncertainty
of 18.1 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 56 degrees.
The GBM light curve shows a peak followed by a tail with a
T90 duration of 3.8 s (8-1000 keV). The time-averaged
spectrum from T0-2.048 s to T0+3.072 s is well fit by a
simple power law function with index -1.60 +/- 0.08.
The event fluence (8-1000 keV) in this time interval is
(5.2 +/- 1.2)E-7 erg/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|