| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090202347 |
|
| T0 |
8:19:30.400 UTC |
Fermi_GBM |
| ra |
274.3000° |
Fermi_GBM |
| decl |
-2.0000° |
Fermi_GBM |
| pos_error |
3.14e+00° |
Fermi_GBM |
| T90 |
12.608 s |
Fermi_GBM |
| T90_error |
0.345 s |
Fermi_GBM |
| T90_start |
8:19:30.592 UTC |
Fermi_GBM |
| fluence |
4.95e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
3.10e-08 erg/cm² |
Fermi_GBM |
| T100 |
12.8 s |
|
| GBM_located |
True |
|
| mjd |
54864.34687962963 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090202347 |
| trigger_name |
bn090202347 |
| ra |
274.3000° |
| decl |
-2.0000° |
| pos_error |
3.14e+00° |
| datum |
2009-02-02 |
| t_trigger |
8:19:30.400 UTC |
| T90 |
12.608 s |
| T90_error |
0.345 s |
| T90_start |
8:19:30.592 UTC |
| fluence |
4.95e-06 erg/cm² |
| fluence_error |
3.10e-08 erg/cm² |
| flux_1024 |
5.75e+00 erg/cm²/s |
| flux_1024_error |
2.09e-01 erg/cm²/s |
| flux_1024_time |
8.70e+00 erg/cm²/s |
| flux_64 |
7.28e+00 erg/cm²/s |
| flux_64_error |
8.44e-01 erg/cm²/s |
| GCN 8877 table |
|---|
| GRB_name |
GRB090202A |
| GCN_number |
8877 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
8:19:30.400 UTC |
| ra |
268.9000° |
| decl |
-2.5000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8877
SUBJECT: GRB 090202: Fermi GBM detection
DATE: 09/02/03 10:14:37 GMT
FROM: Andreas von Kienlin at MPE
A. von Kienlin (MPE) reports on behalf of the Fermi GBM Team:
"At 08:19:30.40 UT on 02 February 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090202 (trigger 255255572 / 090202347).
The on-ground calculated location, using the GBM trigger
data, is RA = 268.9, DEC = -2.5 (J2000 degrees,
equivalent to 17h 56m, -02d 30'), with an uncertainty
of 2.3 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 55 degrees.
This burst was also independently detected by INTEGRAL SPI-ACS.
The GBM light curve shows a single peak and a tail
with a duration (T90) of about 66 s (8-1000 keV).
The time-averaged spectrum from T0-1.536 s to T0+15.872 s is
best fit by a power law function with an exponential
high energy cutoff. The power law index is -1.31 +/- 0.06 and
the cutoff energy, parameterized as Epeak, is 570 +/- 170 keV
(chi squared 510.50 for 485 d.o.f.).
The event fluence (8-1000 keV) in this time interval is
(8.65 +/- 0.31)E-06 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+8.704 s in the 8-1000 keV band
is 7.77 +/- 0.41 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|