| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB081009140 |
|
| T0 |
3:20:58 UTC |
GCN_circulars,Fermi GBM Det |
| ra |
250.5000° |
Fermi_GBM |
| decl |
18.4000° |
Fermi_GBM |
| pos_error |
2.47e+00° |
Fermi_GBM |
| T90 |
41.345 s |
Fermi_GBM |
| T90_error |
0.264 s |
Fermi_GBM |
| T90_start |
3:20:59.407 UTC |
Fermi_GBM |
| fluence |
3.83e-05 erg/cm² |
Fermi_GBM |
| fluence_error |
4.53e-08 erg/cm² |
Fermi_GBM |
| T100 |
42.752 s |
|
| GBM_located |
True |
|
| mjd |
54748.139560185184 |
GCN_circulars,Fermi GBM Det |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB081009140 |
| trigger_name |
bn081009140 |
| ra |
250.5000° |
| decl |
18.4000° |
| pos_error |
2.47e+00° |
| datum |
2008-10-09 |
| t_trigger |
3:20:58.063 UTC |
| T90 |
41.345 s |
| T90_error |
0.264 s |
| T90_start |
3:20:59.407 UTC |
| fluence |
3.83e-05 erg/cm² |
| fluence_error |
4.53e-08 erg/cm² |
| flux_1024 |
1.17e+02 erg/cm²/s |
| flux_1024_error |
6.17e-01 erg/cm²/s |
| flux_1024_time |
2.30e+00 erg/cm²/s |
| flux_64 |
1.30e+02 erg/cm²/s |
| flux_64_error |
2.49e+00 erg/cm²/s |
| GCN 8374 table |
|---|
| GRB_name |
GRB081009A |
| GCN_number |
8374 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
3:20:58 UTC |
| ra |
251.1000° |
| decl |
17.1000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8374
SUBJECT: GRB 081009: Fermi GBM detection
DATE: 08/10/14 16:15:25 GMT
FROM: Andreas von Kienlin at MPE
A. von Kienlin (MPE), P.N. Bhat (UAH) and C.A. Wilson-Hodge (MSFC)
report on behalf of the Fermi GBM Team:
"At 03:20:58 UT on 9 October 2008, the Fermi GBM triggered
and located GRB 081009 (trigger 245215259 / 081009140).
The on-ground calculated location, using the GBM trigger
data, is RA = 251.1, Dec = +17.1 (J2000 degrees,
equivalent to 16h 44m, +17d 06'), 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 67 degrees.
This GRB has two isolated peaks:
The first peak is about 9 sec long. The time-averaged
spectrum (8-1000 keV) from T0-0.1 s to T0+7.9 s is
best fit by a Band function with Epeak = 47.4+/-0.3 keV,
alpha = 0.10+/-0.03, and beta = -3.42+/-0.04.
The fluence (8-1000 keV) is (3.5+/-0.1)E-05 erg/cm^2.
The quoted errors are statistical only, the true errors are
significantly larger due to systematic effects around the
Iodine K-edge energy (33.2 keV) for this very strong event.
The second peak is about 13 sec long. The time-averaged
spectrum (8-1000 keV) from T0+37.4 s to T0+49.3 s is
best fit by a Band function with Epeak = 20.7+/-0.2 keV,
alpha = 0.2+/-0.1, and beta = -4.0+/-0.1.
The fluence (8-1000 keV) is (8.3+/-1.3)E-06 erg/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|