| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090630311 |
|
| T0 |
7:27:20.526 UTC |
Fermi_GBM |
| ra |
146.5500° |
Fermi_GBM |
| decl |
-46.5800° |
Fermi_GBM |
| pos_error |
5.12e+00° |
Fermi_GBM |
| T90 |
2.88 s |
Fermi_GBM |
| T90_error |
0.32 s |
Fermi_GBM |
| T90_start |
7:27:20.526 UTC |
Fermi_GBM |
| fluence |
1.08e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
1.25e-08 erg/cm² |
Fermi_GBM |
| T100 |
2.88 s |
|
| GBM_located |
True |
|
| mjd |
55012.31065423611 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090630311 |
| trigger_name |
bn090630311 |
| ra |
146.5500° |
| decl |
-46.5800° |
| pos_error |
5.12e+00° |
| datum |
2009-06-30 |
| t_trigger |
7:27:21.166 UTC |
| T90 |
2.88 s |
| T90_error |
0.32 s |
| T90_start |
7:27:20.526 UTC |
| fluence |
1.08e-06 erg/cm² |
| fluence_error |
1.25e-08 erg/cm² |
| flux_1024 |
6.19e+00 erg/cm²/s |
| flux_1024_error |
2.06e-01 erg/cm²/s |
| flux_1024_time |
-6.40e-02 erg/cm²/s |
| flux_64 |
7.65e+00 erg/cm²/s |
| flux_64_error |
8.27e-01 erg/cm²/s |
| GCN 9598 table |
|---|
| GRB_name |
GRB090630A |
| GCN_number |
9598 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
7:27:21.170 UTC |
| ra |
146.6000° |
| decl |
-46.6000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9598
SUBJECT: GRB 090630: Fermi GBM detection
DATE: 09/06/30 15:11:20 GMT
FROM: Arne Rau at MPE
Arne Rau (MPE) reports on behalf of the Fermi GBM Team:
"At 07:27:21.17 UT on 30 June 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090630 (trigger 268039643 / 090630311).
The on-ground calculated location, using the GBM trigger
data, is RA = 146.6, DEC = -46.6 (J2000 degrees,
equivalent to 09 h 24 m, -46 d 36 '), with an uncertainty
of 5.8 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 75 degrees.
This burst was also detected (although not triggered) by INTEGRAL SPI-ACS.
The GBM light curve consists of a single peak
with a duration (T90) of about 5.1 s (8-1000 keV).
The time-averaged spectrum from T0-1.024 s to T0+4.096 s is
best fit by a power law function with an exponential
high energy cutoff. The power law index is -1.5 +/- 0.1 and
the cutoff energy, parameterized as Epeak, is 79 +/- 13 keV
(chi squared 537 for 475 d.o.f.).
The event fluence (8-1000 keV) in this time interval is
(5.1 +/- 0.7)E-07 erg/cm^2. The 2.048-sec peak photon flux measured
starting from T0+0.003 s in the 8-1000 keV band
is 2.78 +/- 0.05 ph/s/cm^2.
A Band function fits the spectrum equally well (chi squared 535 for 474
d.o.f.)
with Epeak= 71 +/- 24 keV, alpha = -1.5 +/- 0.2 and beta = -2.3 +/- 0.4.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|