| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090807832 |
|
| T0 |
19:57:57.737 UTC |
Fermi_GBM |
| ra |
326.9000° |
Fermi_GBM |
| decl |
7.2300° |
Fermi_GBM |
| T90 |
17.92 s |
Fermi_GBM |
| T90_error |
2.757 s |
Fermi_GBM |
| T90_start |
19:57:57.737 UTC |
Fermi_GBM |
| fluence |
1.34e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
2.54e-08 erg/cm² |
Fermi_GBM |
| T100 |
17.92 s |
|
| GBM_located |
True |
|
| mjd |
55050.83191825231 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090807832 |
| trigger_name |
bn090807832 |
| ra |
326.9000° |
| decl |
7.2300° |
| datum |
2009-08-07 |
| t_trigger |
19:57:59.017 UTC |
| T90 |
17.92 s |
| T90_error |
2.757 s |
| T90_start |
19:57:57.737 UTC |
| fluence |
1.34e-06 erg/cm² |
| fluence_error |
2.54e-08 erg/cm² |
| flux_1024 |
9.31e+00 erg/cm²/s |
| flux_1024_error |
2.81e-01 erg/cm²/s |
| flux_1024_time |
-5.12e-01 erg/cm²/s |
| flux_64 |
1.58e+01 erg/cm²/s |
| flux_64_error |
1.31e+00 erg/cm²/s |
| GCN 9767 table |
|---|
| GRB_name |
GRB090807B |
| GCN_number |
9767 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
19:57:59.020 UTC |
| ra |
326.9000° |
| decl |
7.2000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9767
SUBJECT: GRB 090807B: Fermi GBM detection
DATE: 09/08/11 22:36:36 GMT
FROM: Bill Paciesas at UAH
W. Paciesas (UAHuntsville) reporta on behalf of the Fermi GBM Team:
"At 19:57:59.02 UT on 7 August 2009, the Fermi Gamma-ray Burst Monitor (GBM)
triggered and located GRB 090807B (trigger 271367881 / 090807.832).
The on-ground calculated location, using the Fermi GBM trigger data,
is RA = 326.9, Dec = +7.2 (J2000 degrees, equivalent to
J2000 21h 48m, +7d 12'), with a statistical uncertainty of 2.6 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 45 degrees.
The GBM light curve consists of a single structured pulse with a duration
of about 3 s (8-1000 keV). The time-averaged spectrum from T0-0.640 to T0+1.408 s
is best fit by a Band function with Epeak = 37 +/- 5 keV,
alpha = -0.6 +/- 0.4, and beta = -2.4 +/- 0.1 (chi^2 387 for 357 d.o.f.).
The fluence (8-1000 keV) in this time interval is (1.02 +/- 0.07)E-06 erg/cm^2.
The 1-sec peak photon flux measured starting from T0-0.512 s in the 8-1000 keV band
is 10.9 +/- 0.5 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|