| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090524346 |
|
| T0 |
8:17:56.230 UTC |
GCN_circulars,Fermi GBM Det |
| ra |
329.5000° |
Fermi_GBM |
| decl |
-67.4000° |
Fermi_GBM |
| pos_error |
2.69e+00° |
Fermi_GBM |
| T90 |
54.337 s |
Fermi_GBM |
| T90_error |
0.87 s |
Fermi_GBM |
| T90_start |
8:17:57.130 UTC |
Fermi_GBM |
| fluence |
1.66e-05 erg/cm² |
Fermi_GBM |
| fluence_error |
6.07e-08 erg/cm² |
Fermi_GBM |
| T100 |
55.237 s |
|
| GBM_located |
True |
|
| mjd |
54975.34578969907 |
GCN_circulars,Fermi GBM Det |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090524346 |
| trigger_name |
bn090524346 |
| ra |
329.5000° |
| decl |
-67.4000° |
| pos_error |
2.69e+00° |
| datum |
2009-05-24 |
| t_trigger |
8:17:56.234 UTC |
| T90 |
54.337 s |
| T90_error |
0.87 s |
| T90_start |
8:17:57.130 UTC |
| fluence |
1.66e-05 erg/cm² |
| fluence_error |
6.07e-08 erg/cm² |
| flux_1024 |
1.30e+01 erg/cm²/s |
| flux_1024_error |
2.18e-01 erg/cm²/s |
| flux_1024_time |
5.06e+00 erg/cm²/s |
| flux_64 |
1.45e+01 erg/cm²/s |
| flux_64_error |
9.29e-01 erg/cm²/s |
| GCN 9424 table |
|---|
| GRB_name |
GRB090524A |
| GCN_number |
9424 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
8:17:56.230 UTC |
| ra |
329.5000° |
| decl |
-67.4000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9424
SUBJECT: GRB 090524: Fermi GBM detection
DATE: 09/05/26 15:20:47 GMT
FROM: Andreas von Kienlin at MPE
A. von Kienlin (MPE) report on behalf of the Fermi GBM Team:
"At 08:17:56.23 UT on 24 May 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090524 (trigger 264845878 / 090524346).
The on-ground calculated location, using the GBM trigger
data, is RA = 329.5, DEC = -67.4 (J2000 degrees,
equivalent to 21h 58m, 67d 24'), with an uncertainty
of 1.3 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 63 degrees.
This burst was also independently detected by INTEGRAL SPI-ACS.
The GBM light curve consists of two main pulses
with a duration (T90) of about 72 s (8-1000 keV).
The time-averaged spectrum from T0+0.003 s to T0+71.681 s is
best fit by a Band function with Epeak = 82.6 +/- 6.3 keV,
alpha = -1.00 +/- 0.08, and beta = -2.30 +/- 0.09
(chi squared 959 for 840 d.o.f.).
The event fluence (8-1000 keV) in this time interval is
(1.85 +/- 0.15)E-05 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+5.120 s in the 8-1000 keV band
is 14.1 +/- 1.4 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|