| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB081028538 |
|
| T0 |
12:55:00.244 UTC |
Fermi_GBM |
| ra |
16.0000° |
Fermi_GBM |
| decl |
-27.2000° |
Fermi_GBM |
| pos_error |
5.45e+00° |
Fermi_GBM |
| T90 |
13.312 s |
Fermi_GBM |
| T90_error |
1.28 s |
Fermi_GBM |
| T90_start |
12:55:00.244 UTC |
Fermi_GBM |
| fluence |
2.27e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
2.59e-08 erg/cm² |
Fermi_GBM |
| T100 |
13.312 s |
|
| GBM_located |
True |
|
| mjd |
54767.53819726852 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB081028538 |
| trigger_name |
bn081028538 |
| ra |
16.0000° |
| decl |
-27.2000° |
| pos_error |
5.45e+00° |
| datum |
2008-10-28 |
| t_trigger |
12:55:08.180 UTC |
| T90 |
13.312 s |
| T90_error |
1.28 s |
| T90_start |
12:55:00.244 UTC |
| fluence |
2.27e-06 erg/cm² |
| fluence_error |
2.59e-08 erg/cm² |
| flux_1024 |
6.34e+00 erg/cm²/s |
| flux_1024_error |
2.15e-01 erg/cm²/s |
| flux_1024_time |
1.15e+00 erg/cm²/s |
| flux_64 |
8.12e+00 erg/cm²/s |
| flux_64_error |
9.41e-01 erg/cm²/s |
| GCN 8433 table |
|---|
| GRB_name |
GRB081028B |
| GCN_number |
8433 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
12:55:08 UTC |
| ra |
19.8000° |
| decl |
-23.5000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8433
SUBJECT: GRB 081028B: Fermi GBM detection
DATE: 08/10/28 21:57:03 GMT
FROM: Elisabetta Bissaldi at MPE
E. Bissaldi (MPE) and A. von Kienlin (MPE)
report on behalf of the Fermi GBM Team:
"At 12:55:08 UT on 28 October 2008, the Fermi GBM triggered
and located GRB 081028B (trigger 246891309 / 081028538).
The on-ground calculated location, using the GBM trigger data,
is RA = 19.8, Dec = -23.5 (J2000 degrees,
equivalent to 1h 19m, -23d 30'), with an uncertainty
of 6.2 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 107 degrees.
This long GRB is single peaked, with an estimated T90 (50-300 keV)
of about 20 s. The time-averaged spectrum (10-1000 keV) from T0-5.1 s to
T0+7.1 s is well fit by a power law function with an exponential
high-energy cutoff. The cutoff energy, parameterized as Epeak,
is 70 +/- 4 keV with a power law index of -0.55 +/- 0.16.
The fluence (10-1000 keV) in this time interval is
(2.0 +/- 0.3)E-06 erg/cm^2. The 1 sec peak photon flux measured starting
from T0+1.5 s in the 10-1000 keV band is 6.9 +/- 0.5 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|