| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB081118876 |
|
| T0 |
21:00:53.530 UTC |
GCN_circulars,Fermi GBM Det |
| ra |
54.6000° |
Fermi_GBM |
| decl |
-43.3000° |
Fermi_GBM |
| pos_error |
3.24e+00° |
Fermi_GBM |
| T90 |
20.736 s |
Fermi_GBM |
| T90_error |
1.379 s |
Fermi_GBM |
| T90_start |
21:00:53.792 UTC |
Fermi_GBM |
| fluence |
4.94e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
4.43e-08 erg/cm² |
Fermi_GBM |
| T100 |
20.998 s |
|
| GBM_located |
True |
|
| mjd |
54788.87561956018 |
GCN_circulars,Fermi GBM Det |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB081118876 |
| trigger_name |
bn081118876 |
| ra |
54.6000° |
| decl |
-43.3000° |
| pos_error |
3.24e+00° |
| datum |
2008-11-18 |
| t_trigger |
21:00:53.536 UTC |
| T90 |
20.736 s |
| T90_error |
1.379 s |
| T90_start |
21:00:53.792 UTC |
| fluence |
4.94e-06 erg/cm² |
| fluence_error |
4.43e-08 erg/cm² |
| flux_1024 |
7.29e+00 erg/cm²/s |
| flux_1024_error |
1.86e-01 erg/cm²/s |
| flux_1024_time |
7.36e+00 erg/cm²/s |
| flux_64 |
9.58e+00 erg/cm²/s |
| flux_64_error |
8.79e-01 erg/cm²/s |
| GCN 8550 table |
|---|
| GRB_name |
GRB081118B |
| GCN_number |
8550 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
21:00:53.530 UTC |
| ra |
54.0000° |
| decl |
-50.4000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8550
SUBJECT: GRB 081118: Fermi GBM detection.
DATE: 08/11/24 18:06:29 GMT
FROM: Narayana Bhat at U Alabama/Huntsville/GBM
P. N. Bhat (UAH), R. D. Preece (UAH) and A.J. van der Horst (NASA/ORAU)
report on behalf of the Fermi GBM Team:
At 21:00:53.53 UT on 18 November 2008, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 081118B (trigger 248734854 / 081118876).
The on-ground calculated location, using the GBM trigger
data, is RA = 54.0, DEC = -50.4 (J2000 degrees,
equivalent to 03 h 36 m, 50 d 24'), with an uncertainty
of 2.9 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 41 degrees.
The GBM light curve consists of primarily 2 pulses.
It has a duration (T90) of about 20 s (8-1000 keV).
The time-averaged spectrum from T0-2.6 s to T0+27 s is
well fit by a Band function with Epeak = 41.2 +/- 3.9,
alpha = 0.8 +/- 0.5 and beta = -2.14 +/- 0.08.
The event fluence (8-1000 keV) in this time interval is
(1.12 +/- 0.61)E-7 erg/cm^2. The 1-sec peak photon flux
in the 8-1000 keV band is 0.67 +/- 0.37 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog.
|