| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB081125496 |
|
| T0 |
11:53:39 UTC |
GCN_circulars,Fermi GBM Det |
| ra |
42.7000° |
Fermi_GBM |
| decl |
-18.9000° |
Fermi_GBM |
| pos_error |
2.49e+00° |
Fermi_GBM |
| T90 |
9.28 s |
Fermi_GBM |
| T90_error |
0.607 s |
Fermi_GBM |
| T90_start |
11:53:39.515 UTC |
Fermi_GBM |
| fluence |
1.85e-05 erg/cm² |
Fermi_GBM |
| fluence_error |
1.33e-07 erg/cm² |
Fermi_GBM |
| T100 |
9.795 s |
|
| GBM_located |
True |
|
| mjd |
54795.49559027778 |
GCN_circulars,Fermi GBM Det |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB081125496 |
| trigger_name |
bn081125496 |
| ra |
42.7000° |
| decl |
-18.9000° |
| pos_error |
2.49e+00° |
| datum |
2008-11-25 |
| t_trigger |
11:53:39.003 UTC |
| T90 |
9.28 s |
| T90_error |
0.607 s |
| T90_start |
11:53:39.515 UTC |
| fluence |
1.85e-05 erg/cm² |
| fluence_error |
1.33e-07 erg/cm² |
| flux_1024 |
2.32e+01 erg/cm²/s |
| flux_1024_error |
4.35e-01 erg/cm²/s |
| flux_1024_time |
2.11e+00 erg/cm²/s |
| flux_64 |
2.76e+01 erg/cm²/s |
| flux_64_error |
1.91e+00 erg/cm²/s |
| GCN 8553 table |
|---|
| GRB_name |
GRB081125A |
| GCN_number |
8553 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
11:53:39 UTC |
| ra |
42.3000° |
| decl |
-22.4000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8553
SUBJECT: GRB 081125: Fermi GBM detection
DATE: 08/11/26 17:28:43 GMT
FROM: Andreas von Kienlin at MPE
A. von Kienlin (MPE) and E. Bissaldi (MPE)
report on behalf of the Fermi GBM Team:
"At 11:53:39.00 UT on 25 November 2008, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 081125 (trigger 249306820 / 081125496).
The on-ground calculated location, using the GBM trigger
data, is RA = 42.3, DEC = -22.4 (J2000 degrees,
equivalent to 02h 49m, -22d 24'), with an uncertainty
of 1.0 degree (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 126 degrees.
This burst was also independently detected by INTEGRAL SPI-ACS.
This GRB consists of a single peak with T90 (8-1000 keV)
of about 15 s and T50 (8-1000 KeV) of about 4.4 s.
Since this GRB shows strong spectral evolution we fitted
two time intervals:
The time-averaged spectrum from T0 to T0+3.200 s is
best fit by a Band function with Epeak = 221 +/- 16 keV,
alpha = 0.14 +/- 0.09, and beta = -2.34 +/- 0.22
(chi squared 354 for 357 d.o.f.).
The time-averaged spectrum from T0+3.200 s to T0+14.464 s is
best fit by a power law function with an exponential
high energy cutoff. The power law index is -0.27 +/- 0.06
and the cutoff energy, parameterized as Epeak, is 257 +/- 12 keV
(chi squared 360 for 358 d.o.f.)
The event fluence (8-1000 keV) from T0+0.003 s to T0+14.464 s is
(4.91 +/- 0.16)E-05 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+2.176 s in the 8-1000 keV band
is 27.0 +/- 2.7 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|