| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090330279 |
|
| T0 |
6:41:29.360 UTC |
Fermi_GBM |
| ra |
160.2000° |
Fermi_GBM |
| decl |
-8.2000° |
Fermi_GBM |
| pos_error |
3.04e+00° |
Fermi_GBM |
| T90 |
75.265 s |
Fermi_GBM |
| T90_error |
1.379 s |
Fermi_GBM |
| T90_start |
6:41:29.360 UTC |
Fermi_GBM |
| fluence |
1.37e-05 erg/cm² |
Fermi_GBM |
| fluence_error |
4.89e-08 erg/cm² |
Fermi_GBM |
| T100 |
75.265 s |
|
| GBM_located |
True |
|
| mjd |
54920.27881203704 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090330279 |
| trigger_name |
bn090330279 |
| ra |
160.2000° |
| decl |
-8.2000° |
| pos_error |
3.04e+00° |
| datum |
2009-03-30 |
| t_trigger |
6:42:22.097 UTC |
| T90 |
75.265 s |
| T90_error |
1.379 s |
| T90_start |
6:41:29.360 UTC |
| fluence |
1.37e-05 erg/cm² |
| fluence_error |
4.89e-08 erg/cm² |
| flux_1024 |
5.93e+00 erg/cm²/s |
| flux_1024_error |
2.50e-01 erg/cm²/s |
| flux_1024_time |
1.25e+01 erg/cm²/s |
| flux_64 |
7.63e+00 erg/cm²/s |
| flux_64_error |
1.10e+00 erg/cm²/s |
| GCN 9055 table |
|---|
| GRB_name |
GRB090330A |
| GCN_number |
9055 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
6:42:22.100 UTC |
| ra |
159.2000° |
| decl |
-7.7000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9055
SUBJECT: GRB 090330: Fermi GBM detection
DATE: 09/03/30 15:59:50 GMT
FROM: Andreas von Kienlin at MPE
A. von Kienlin (MPE) reports on behalf of the Fermi GBM Team:
"At 06:42:22.10 UT on 30 March 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090330 (trigger 260088144 / 090330279).
The on-ground calculated location, using the GBM trigger
data, is RA = 159.2, DEC = -7.7 (J2000 degrees,
equivalent to 10h 37m, -07d 42'), with an uncertainty
of 2.1 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 50 degrees.
The GBM light curve consists of a slowly rising pulse
with a duration (T90) of about 80 s (8-1000 keV).
The time-averaged spectrum from T0-2.048 s to T0+24.576 s is
well fit by a power law function with an exponential
high energy cutoff. The power law index is -1.01 +/- 0.04 and
the cutoff energy, parameterized as Epeak, is 261 +/- 18 keV
(chi squared 606 for 609 d.o.f.).
The event fluence (8-1000 keV) in this time interval is
(1.14 +/- 0.03)E-05 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+12.288 s in the 8-1000 keV band
is 6.8 +/- 0.3 ph/s/cm^2.
A Band function fits the spectrum equally well
(chi squared 605 for 608 d.o.f.) with Epeak= 246 +/- 25 keV,
alpha = -0.99 +/- 0.05 and beta = -2.68 +/- 0.55.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|