| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090109332 |
|
| T0 |
7:58:29.237 UTC |
Fermi_GBM |
| ra |
129.6000° |
Fermi_GBM |
| decl |
51.8000° |
Fermi_GBM |
| pos_error |
7.19e+00° |
Fermi_GBM |
| T90 |
1.728 s |
Fermi_GBM |
| T90_error |
0.82 s |
Fermi_GBM |
| T90_start |
7:58:29.237 UTC |
Fermi_GBM |
| fluence |
2.09e-07 erg/cm² |
Fermi_GBM |
| fluence_error |
2.31e-08 erg/cm² |
Fermi_GBM |
| T100 |
1.728 s |
|
| GBM_located |
True |
|
| mjd |
54840.33228283565 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090109332 |
| trigger_name |
bn090109332 |
| ra |
129.6000° |
| decl |
51.8000° |
| pos_error |
7.19e+00° |
| datum |
2009-01-09 |
| t_trigger |
7:58:29.493 UTC |
| T90 |
1.728 s |
| T90_error |
0.82 s |
| T90_start |
7:58:29.237 UTC |
| fluence |
2.09e-07 erg/cm² |
| fluence_error |
2.31e-08 erg/cm² |
| flux_1024 |
1.83e+00 erg/cm²/s |
| flux_1024_error |
2.21e-01 erg/cm²/s |
| flux_1024_time |
-4.48e-01 erg/cm²/s |
| flux_64 |
4.34e+00 erg/cm²/s |
| flux_64_error |
1.17e+00 erg/cm²/s |
| GCN 8802 table |
|---|
| GRB_name |
GRB090109A |
| GCN_number |
8802 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
7:58:29.490 UTC |
| ra |
122.8000° |
| decl |
54.8000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8802
SUBJECT: GRB 090109: Fermi GBM detection
DATE: 09/01/12 22:30:25 GMT
FROM: Elisabetta Bissaldi at MPE
E. Bissaldi(MPE) and A. von Kienlin (MPE)
report on behalf of the Fermi GBM Team:
"At 07:58:29.49 UT on Day Month Year, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090109 (trigger 253180711 / 090109332).
The on-ground calculated location, using the GBM trigger
data, is RA = 122.8, DEC = +54.8 (J2000 degrees,
equivalent to 08h 11m, 54d 48'), with an uncertainty
of 12.5 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 62 degrees.
This weak GRB consists of a single peak
with a duration (T90) of about 5 s (8-1000 keV).
The time-averaged spectrum from T0-2.8 s to T0+1.3 s is
well fit by a simple power law function with
index -1.50 +/- 0.08 (chi squared 236 for 241 d.o.f.).
The event fluence (8-1000 keV) in this time interval is
(1.21 +/- 0.05)E-06 erg/cm^2. The 1.3-sec peak photon flux measured
starting from T0 in the 8-1000 keV band
is 2.76 +/- 0.16 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|