| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090307167 |
|
| T0 |
3:59:52.129 UTC |
Fermi_GBM |
| ra |
172.7000° |
Fermi_GBM |
| decl |
-23.9000° |
Fermi_GBM |
| pos_error |
7.76e+00° |
Fermi_GBM |
| T90 |
29.44 s |
Fermi_GBM |
| T90_error |
1.81 s |
Fermi_GBM |
| T90_start |
3:59:52.129 UTC |
Fermi_GBM |
| fluence |
1.09e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
3.69e-08 erg/cm² |
Fermi_GBM |
| T100 |
29.44 s |
|
| GBM_located |
True |
|
| mjd |
54897.16657556713 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090307167 |
| trigger_name |
bn090307167 |
| ra |
172.7000° |
| decl |
-23.9000° |
| pos_error |
7.76e+00° |
| datum |
2009-03-07 |
| t_trigger |
3:59:57.249 UTC |
| T90 |
29.44 s |
| T90_error |
1.81 s |
| T90_start |
3:59:52.129 UTC |
| fluence |
1.09e-06 erg/cm² |
| fluence_error |
3.69e-08 erg/cm² |
| flux_1024 |
1.41e+00 erg/cm²/s |
| flux_1024_error |
2.42e-01 erg/cm²/s |
| flux_1024_time |
-7.68e-01 erg/cm²/s |
| flux_64 |
3.97e+00 erg/cm²/s |
| flux_64_error |
1.36e+00 erg/cm²/s |
| GCN 8961 table |
|---|
| GRB_name |
GRB090307B |
| GCN_number |
8961 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
4:00:58.600 UTC |
| ra |
158.6000° |
| decl |
-14.6000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8961
SUBJECT: GRB 090307B: Fermi GBM detection
DATE: 09/03/09 15:16:17 GMT
FROM: Elisabetta Bissaldi at MPE
E.Bissaldi (MPE) and A. von Kienlin (MPE)
report on behalf of the Fermi GBM Team:
"At 04:00:58.60 UT on 07 March 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090307B (trigger 258091199 / 090307167).
The on-ground calculated location, using the GBM trigger
data, is RA = 158.6, DEC = -14.6 (J2000 degrees,
equivalent to 10h 34m, -14d 36'), with an uncertainty
of 9.7 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 83 degrees.
This long GRB consists of one main FRED-like pulse with
substructure, rising at T0-6 s and with a duration (T90)
of about 30 s (8-1000 keV). T50 is about 15 s (8-1000 keV).
The time-averaged spectrum from T0-6 s to T0+10.4 s is
best fit by a power law function with an exponential
high energy cutoff. The power law index
is -0.7 +/- 0.3 and the cutoff energy, parameterized as
Epeak, is 212 +/- 80 keV (chi squared 346 for 357 d.o.f.).
The event fluence (8-1000 keV) in this time interval is
(1.7 +/- 0.4)E-06 erg/cm^2. The 1-sec peak photon flux
measured starting from T0-5 s in the 8-1000 keV band
is 1.80 +/- 0.12 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|