| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090620400 |
|
| T0 |
9:36:23.468 UTC |
Fermi_GBM |
| ra |
237.3500° |
Fermi_GBM |
| decl |
61.1500° |
Fermi_GBM |
| pos_error |
2.57e+00° |
Fermi_GBM |
| T90 |
13.568 s |
Fermi_GBM |
| T90_error |
0.724 s |
Fermi_GBM |
| T90_start |
9:36:23.980 UTC |
Fermi_GBM |
| fluence |
1.33e-05 erg/cm² |
Fermi_GBM |
| fluence_error |
4.27e-08 erg/cm² |
Fermi_GBM |
| T100 |
14.08 s |
|
| GBM_located |
True |
|
| mjd |
55002.40027162037 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090620400 |
| trigger_name |
bn090620400 |
| ra |
237.3500° |
| decl |
61.1500° |
| pos_error |
2.57e+00° |
| datum |
2009-06-20 |
| t_trigger |
9:36:23.468 UTC |
| T90 |
13.568 s |
| T90_error |
0.724 s |
| T90_start |
9:36:23.980 UTC |
| fluence |
1.33e-05 erg/cm² |
| fluence_error |
4.27e-08 erg/cm² |
| flux_1024 |
1.54e+01 erg/cm²/s |
| flux_1024_error |
2.85e-01 erg/cm²/s |
| flux_1024_time |
4.03e+00 erg/cm²/s |
| flux_64 |
1.91e+01 erg/cm²/s |
| flux_64_error |
1.30e+00 erg/cm²/s |
| GCN 9554 table |
|---|
| GRB_name |
GRB090620A |
| GCN_number |
9554 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
9:36:23.470 UTC |
| ra |
237.4000° |
| decl |
61.2000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9554
SUBJECT: GRB 090620: Fermi GBM detecion
DATE: 09/06/22 15:11:42 GMT
FROM: Arne Rau at MPE
Arne Rau (MPE) reports on behalf of the Fermi GBM Team:
"At 09:36:23.47 UT on 20 June 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090620 (trigger 267183385 / 090620400).
The on-ground calculated location, using the GBM trigger
data, is RA = 237.4 deg, DEC = 61.2 deg (J2000 degrees,
equivalent to 15 h 50 m, 61 d 12 '), with an uncertainty
of 1.0 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 60 degrees.
This burst was also independently detected by INTEGRAL SPI-ACS.
The GBM light curve shows a single peak
with a duration (T90) of about 16.5 s (8-1000 keV).
The time-averaged spectrum from T0-0.003 s to T0+16.640 s is
best fit by a Band function with Epeak = 156 +/- 6 keV,
alpha = -0.40 +/- 0.04, and beta = -2.44 +/- 0.10
(chi squared 576 for 532 d.o.f.).
The event fluence (8-1000 keV) in this time interval is
(6.6 +/- 0.2)E-06 erg/cm^2. The 1.024-sec peak photon flux measured
starting from T0+4.352 s in the 8-1000 keV band
is 7.0 +/- 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|