| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090207777 |
|
| T0 |
18:39:10.325 UTC |
Fermi_GBM |
| ra |
252.7000° |
Fermi_GBM |
| decl |
34.9000° |
Fermi_GBM |
| pos_error |
3.65e+00° |
Fermi_GBM |
| T90 |
24.832 s |
Fermi_GBM |
| T90_error |
3.899 s |
Fermi_GBM |
| T90_start |
18:39:10.325 UTC |
Fermi_GBM |
| fluence |
2.41e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
4.17e-08 erg/cm² |
Fermi_GBM |
| T100 |
24.832 s |
|
| GBM_located |
True |
|
| mjd |
54869.77720283565 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090207777 |
| trigger_name |
bn090207777 |
| ra |
252.7000° |
| decl |
34.9000° |
| pos_error |
3.65e+00° |
| datum |
2009-02-07 |
| t_trigger |
18:39:10.837 UTC |
| T90 |
24.832 s |
| T90_error |
3.899 s |
| T90_start |
18:39:10.325 UTC |
| fluence |
2.41e-06 erg/cm² |
| fluence_error |
4.17e-08 erg/cm² |
| flux_1024 |
2.79e+00 erg/cm²/s |
| flux_1024_error |
2.25e-01 erg/cm²/s |
| flux_1024_time |
1.66e+00 erg/cm²/s |
| flux_64 |
3.67e+00 erg/cm²/s |
| flux_64_error |
1.05e+00 erg/cm²/s |
| GCN 8899 table |
|---|
| GRB_name |
GRB090207A |
| GCN_number |
8899 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
18:39:10.840 UTC |
| ra |
244.6600° |
| decl |
36.8100° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8899
SUBJECT: GRB 090207 - Fermi GBM Observations
DATE: 09/02/10 18:35:46 GMT
FROM: Narayana Bhat at U Alabama/Huntsville/GBM
P. N. Bhat (UAH)
reports on behalf of the Fermi GBM Team:
"At 18:39:10.84 UT on 07 February 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090207 (trigger 255724752 / 090207777).
The on-ground calculated location, using the GBM trigger
data, is RA = 244.66, DEC = +36.81 (J2000 degrees,
equivalent to 16 h 19 m, 36 d 49'), with an uncertainty
of 3 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 shows a typical fast rise and a slow decay
pulse with a duration (T90) of about 10 s (8-1000 keV).
The time-averaged spectrum from T0-2.048 s to T0+15.36 s is
well fit by a power law function. The power law index is -1.59 +/- 0.04
(chi squared 490 for 508 d.o.f.).
The event fluence (8-1000 keV) in this time interval is
(4.01 +/- 0.09)E-06 erg/cm^2. The 1-sec peak photon flux measured
starting from T0 in the 8-1000 keV band
is 1.88 +/- 0.04 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|