| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090306245 |
|
| T0 |
5:52:02.529 UTC |
Fermi_GBM |
| ra |
137.0000° |
Fermi_GBM |
| decl |
57.0000° |
Fermi_GBM |
| pos_error |
6.19e+00° |
Fermi_GBM |
| T90 |
27.904 s |
Fermi_GBM |
| T90_error |
14.857 s |
Fermi_GBM |
| T90_start |
5:52:02.529 UTC |
Fermi_GBM |
| fluence |
1.37e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
3.70e-08 erg/cm² |
Fermi_GBM |
| T100 |
27.904 s |
|
| GBM_located |
True |
|
| mjd |
54896.24447371528 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090306245 |
| trigger_name |
bn090306245 |
| ra |
137.0000° |
| decl |
57.0000° |
| pos_error |
6.19e+00° |
| datum |
2009-03-06 |
| t_trigger |
5:52:05.345 UTC |
| T90 |
27.904 s |
| T90_error |
14.857 s |
| T90_start |
5:52:02.529 UTC |
| fluence |
1.37e-06 erg/cm² |
| fluence_error |
3.70e-08 erg/cm² |
| flux_1024 |
1.72e+00 erg/cm²/s |
| flux_1024_error |
2.18e-01 erg/cm²/s |
| flux_1024_time |
1.92e-01 erg/cm²/s |
| flux_64 |
3.59e+00 erg/cm²/s |
| flux_64_error |
9.80e-01 erg/cm²/s |
| GCN 8960 table |
|---|
| GRB_name |
GRB090306C |
| GCN_number |
8960 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
5:52:05.350 UTC |
| ra |
135.0000° |
| decl |
51.7000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8960
SUBJECT: GRB 090306C: Fermi GBM detection
DATE: 09/03/09 14:59:13 GMT
FROM: Arne Rau at MPE
Arne Rau (MPE) reports on behalf of the Fermi GBM Team:
"At 05:52:05.35 UT on 06 March 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090306C (trigger 258011527 / 090306245).
The on-ground calculated location, using the GBM trigger
data, is RA = 135.0, DEC = +51.7 (J2000 degrees,
equivalent to 09 h 00 m, 51 d 36 '), with an uncertainty
of 5.5 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 14 degrees.
The GBM light curve shows one main peak lasting about 5s followed by a
broader tail
with a total duration (T90) of about 38.8 s (8-1000 keV).
The time-averaged spectrum from T0-4.096 s to T0+6.144 s is
adequately fit by a power law function with an exponential
high energy cutoff at 107 +/- 16 keV and with index -0.58 +/- 0.29
(chi squared 380 for 381 d.o.f.).
The event fluence (8-1000 keV) in this time interval is
(9.0 +/- 2.2)E-07 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+1.024 s in the 8-1000 keV band
is 2.4 +/- 0.1 ph/s/cm^2.
A Band function fits the spectrum equally well (chi squared 378 for 380
d.o.f.)
with Epeak= 87 +/- 25 keV, alpha = -0.32 +/- 0.54 and beta = -2.28 +/-0.43.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|