| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB090621447 |
|
| T0 |
10:43:44.889 UTC |
Fermi_GBM |
| ra |
12.2700° |
Fermi_GBM |
| decl |
-22.5800° |
Fermi_GBM |
| pos_error |
4.33e+00° |
Fermi_GBM |
| T90 |
26.112 s |
Fermi_GBM |
| T90_error |
5.655 s |
Fermi_GBM |
| T90_start |
10:43:44.889 UTC |
Fermi_GBM |
| fluence |
1.57e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
5.25e-08 erg/cm² |
Fermi_GBM |
| T100 |
26.112 s |
|
| GBM_located |
True |
|
| mjd |
55003.44704732639 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB090621447 |
| trigger_name |
bn090621447 |
| ra |
12.2700° |
| decl |
-22.5800° |
| pos_error |
4.33e+00° |
| datum |
2009-06-21 |
| t_trigger |
10:43:45.145 UTC |
| T90 |
26.112 s |
| T90_error |
5.655 s |
| T90_start |
10:43:44.889 UTC |
| fluence |
1.57e-06 erg/cm² |
| fluence_error |
5.25e-08 erg/cm² |
| flux_1024 |
2.84e+00 erg/cm²/s |
| flux_1024_error |
2.25e-01 erg/cm²/s |
| flux_1024_time |
1.74e+01 erg/cm²/s |
| flux_64 |
5.71e+00 erg/cm²/s |
| flux_64_error |
1.16e+00 erg/cm²/s |
| GCN 9560 table |
|---|
| GRB_name |
GRB090621D |
| GCN_number |
9560 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
10:43:45.140 UTC |
| ra |
12.3000° |
| decl |
-22.6000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9560
SUBJECT: GRB 090621D: Fermi GBM detection
DATE: 09/06/22 19:47:45 GMT
FROM: Arne Rau at MPE
Arne Rau (MPE) reports on behalf of the Fermi GBM Team:
"At 10:43:45.14 UT on 21 June 2009, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 090621D (267273827 / 090621447).
The on-ground calculated location, using the GBM trigger
data, is RA = 12.3, DEC = -22.6 (J2000 degrees,
equivalent to 00 h 49 m, -22 d 36 '), with an uncertainty
of 4.9 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 79 degrees.
The GBM light curve consists of two peaks
with a duration (T90) of about 39.9 s (8-1000 keV).
The time-averaged spectrum from T0-1.024 s to T0+20.480 s is
adequately fit by a simple power law function with index -1.66 +/- 0.05
(chi squared 752 for 694 d.o.f.).
The event fluence (8-1000 keV) in this time interval is
(1.34 +/- 0.03)E-06 erg/cm^2. The 1.024-sec peak photon flux measured
starting from T0-1.024 s in the 8-1000 keV band
is 1.74 +/- 0.05 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|