| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090612619 |
|
| T0 |
14:50:17.981 UTC |
Fermi_GBM |
| ra |
81.0300° |
Fermi_GBM |
| decl |
17.7100° |
Fermi_GBM |
| pos_error |
3.96e+00° |
Fermi_GBM |
| T90 |
37.12 s |
Fermi_GBM |
| T90_error |
1.717 s |
Fermi_GBM |
| T90_start |
14:50:17.981 UTC |
Fermi_GBM |
| fluence |
6.66e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
4.34e-08 erg/cm² |
Fermi_GBM |
| T100 |
37.12 s |
|
| GBM_located |
True |
|
| mjd |
54994.618263668985 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090612619 |
| trigger_name |
bn090612619 |
| ra |
81.0300° |
| decl |
17.7100° |
| pos_error |
3.96e+00° |
| datum |
2009-06-12 |
| t_trigger |
14:50:50.494 UTC |
| T90 |
37.12 s |
| T90_error |
1.717 s |
| T90_start |
14:50:17.981 UTC |
| fluence |
6.66e-06 erg/cm² |
| fluence_error |
4.34e-08 erg/cm² |
| flux_1024 |
6.78e+00 erg/cm²/s |
| flux_1024_error |
2.36e-01 erg/cm²/s |
| flux_1024_time |
5.76e-01 erg/cm²/s |
| flux_64 |
8.75e+00 erg/cm²/s |
| flux_64_error |
1.01e+00 erg/cm²/s |
| GCN 9510 table |
|---|
| GRB_name |
GRB090612A |
| GCN_number |
9510 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
14:50:50.490 UTC |
| ra |
81.1000° |
| decl |
17.8000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9510
SUBJECT: GRB 090612: Fermi GBM detection
DATE: 09/06/15 15:15:49 GMT
FROM: Narayana Bhat at U Alabama/Huntsville/GBM
C. A. Meegan (USRA) and P. N. Bhat (UAH)
report on behalf of the Fermi GBM Team:
"At 14:50:50.49 UT on 12 June 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090612 (trigger 266511052 / 090612619 ).
The on-ground calculated location, using the GBM trigger
data, is RA = 81.1, DEC = 17.8 (J2000 degrees,
equivalent to 05h 24.3 m, 17 d 45'), with an uncertainty
of 2.2 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 56 degrees.
The GBM light curve shows of single strong pulse preceded by
weaker pre-trigger emission with a duration (T90) of about 58 s (8-1000
keV).
The time-averaged spectrum from T0-1.024 s to T0+5.12 s is
adequately fit by a Band function with Epeak = 357 +/- 59 keV,
alpha = -0.6 +/- 0.1, and beta = -1.9 +/- 0.1
(chi squared 679.7 for 604 d.o.f.).
The event fluence (8-1000 keV) in this time interval is
(2.37 +/- 0.14)E-06 erg/cm^2. The 1-sec peak photon flux measured
starting from T0 s in the 8-1000 keV band
is 1.63 +/- 0.1 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|