| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090108322 |
|
| T0 |
7:43:23.296 UTC |
Fermi_GBM |
| ra |
0.4000° |
Fermi_GBM |
| decl |
-32.9000° |
Fermi_GBM |
| pos_error |
8.16e+00° |
Fermi_GBM |
| T90 |
0.192 s |
Fermi_GBM |
| T90_error |
0.143 s |
Fermi_GBM |
| T90_start |
7:43:23.296 UTC |
Fermi_GBM |
| fluence |
5.36e-07 erg/cm² |
Fermi_GBM |
| fluence_error |
1.41e-08 erg/cm² |
Fermi_GBM |
| T100 |
0.192 s |
|
| GBM_located |
True |
|
| mjd |
54839.32179740741 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090108322 |
| trigger_name |
bn090108322 |
| ra |
0.4000° |
| decl |
-32.9000° |
| pos_error |
8.16e+00° |
| datum |
2009-01-08 |
| t_trigger |
7:43:23.360 UTC |
| T90 |
0.192 s |
| T90_error |
0.143 s |
| T90_start |
7:43:23.296 UTC |
| fluence |
5.36e-07 erg/cm² |
| fluence_error |
1.41e-08 erg/cm² |
| flux_1024 |
1.97e+00 erg/cm²/s |
| flux_1024_error |
1.95e-01 erg/cm²/s |
| flux_1024_time |
-5.76e-01 erg/cm²/s |
| flux_64 |
1.03e+01 erg/cm²/s |
| flux_64_error |
1.03e+00 erg/cm²/s |
| GCN 8801 table |
|---|
| GRB_name |
GRB090108B |
| GCN_number |
8801 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
7:43:23.360 UTC |
| ra |
3.8000° |
| decl |
-32.2000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8801
SUBJECT: GRB 090108B: Fermi GBM detection
DATE: 09/01/12 22:28:05 GMT
FROM: Elisabetta Bissaldi at MPE
E. Bissaldi (MPE) and A. von Kienlin (MPE)
report on behalf of the Fermi GBM Team:
"At 07:43:23.36 UT on 08 January 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090108B (trigger 253093405 / 090108322).
The on-ground calculated location, using the GBM trigger
data, is RA = 3.8, DEC = -32.2 (J2000 degrees,
equivalent to 00h 15m, -32d 12'), with an uncertainty
of 6.4 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 72 degrees.
The GBM light curve shows a single spike
with a duration (T90) of about 800 ms (8-1000 keV).
The time-averaged spectrum from T0-0.295 s to T0+0.121 s
is well fit by a simple power law function with
index -0.99 +/- 0.06 (chi squared 246 for 242 d.o.f.).
The event fluence (8-1000 keV) in this time interval is
(7.9 +/- 0.4)E-07 erg/cm^2. The 32-ms peak photon flux measured
starting from T0-0.008 s in the 8-1000 keV band
is 19.0 +/- 1.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|