Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done using the HEASARC data.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time: Sun Jan 19 17:12:54 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger350479
======================================================================
Trigger: 00350479 Segment: 000
BAT Trigger Time: 262442931.904 [s; MET]
Trigger Stop: 262442932.416 [s; MET]
UTC: 2009-04-26T12:48:47.212900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 189.090930330315 Dec: 32.9656829712553 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.03
Image Trigger?: NO
Rate S/N Ratio: 15.2643375224737 [ if not an image trigger ]
Image S/N Ratio: 8.03
Analysis Position: [ source = BAT ]
RA: 189.090930330315 Dec: 32.9656829712553 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 189.083423821246 Dec: 32.9802091390941 [deg; J2000]
{ 12h 36m 20.0s , +32d 58' 48.8" }
+/- 1.71324666033797 [arcmin] (estimated 90% radius based on SNR)
+/- 0.673473634016666 [arcmin] (formal 1-sigma fit error)
SNR: 14.0958074988525
Angular difference between the analysis and refined position is 0.949948 arcmin
Partial Coding Fraction: 0.3203125 [ including projection effects ]
Duration
T90: 1.23600003123283 +/- 0.253298247287679
Measured from: 0.0319999754428864
to: 1.26800000667572 [s; relative to TRIGTIME]
T50: 0.439999997615814 +/- 0.198715879551252
Measured from: 0.299999982118607
to: 0.739999979734421 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0340000092983246
to: 0.965999990701675 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0320000052452087
to: 1.33999997377396 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.099943 0.130610 0.073211 0.019366
0.012923 0.013590 0.011872 0.009535 [error]
Peak 0.080774 0.107132 0.064400 0.023300
0.011289 0.012082 0.010523 0.008166 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 1.372 -0.032 1.340
T90 1.236 0.032 1.268
T50 0.440 0.300 0.740
Peak 1.000 -0.034 0.966
====== Spectral Analysis Summary =====================================
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^{Ph_index}
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedo
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
Model Ph_index Ph_90err_low Ph_90err_hi Epeak Epeak_90err_low Epeak_90err_hi Norm Nomr_90err_low Norm_90err_hi chi2 dof
PL -1.837 -0.218 0.207 - - - 1.46e-02 -2.11e-03 2.07e-03 57.930 57
CPL -1.105 -0.801 0.995 55.086 -16.188 -55.086 3.72e-02 -2.32e-02 9.43e-02 55.500 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
Model Ph_index Ph_90err_low Ph_90err_hi Epeak Epeak_90err_low Epeak_90err_hi Norm Nomr_90err_low Norm_90err_hi chi2 dof
PL -1.740 -0.227 0.217 - - - 1.69e-02 -2.50e-03 2.45e-03 55.720 57
CPL -1.161 -0.727 1.020 67.223 -22.294 -67.223 3.50e-02 -1.97e-02 9.00e-02 54.300 56
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence PL 3.52e-08 5.27e-08 5.90e-08 1.25e-07 1.85e-07 2.72e-07 erg/cm2
90%_error_low -6.20e-09 -6.54e-09 -1.12e-08 -4.15e-08 -2.65e-08 -5.47e-08 erg/cm2
90%_error_hi 6.39e-09 6.54e-09 1.12e-08 5.25e-08 2.69e-08 6.30e-08 erg/cm2
Peak flux PL 8.77e-01 7.66e-01 4.59e-01 4.14e-01 2.28e+00 2.52e+00 ph/cm2/s
90%_error_low -1.73e-01 -1.03e-01 -8.56e-02 -1.32e-01 -3.06e-01 -3.37e-01 ph/cm2/s
90%_error_hi 1.80e-01 1.03e-01 8.51e-02 1.63e-01 3.06e-01 3.38e-01 ph/cm2/s
Fluence CPL 3.26e-08 5.79e-08 5.99e-08 4.34e-08 1.76e-07 1.94e-07 erg/cm2
90%_error_low -7.05e-09 -8.62e-09 -1.30e-08 -2.99e-08 -2.82e-08 -4.21e-08 erg/cm2
90%_error_hi 7.08e-09 9.01e-09 1.27e-08 9.69e-08 2.87e-08 9.77e-08 erg/cm2
Peak flux CPL 8.16e-01 8.23e-01 4.76e-01 2.13e-01 2.25e+00 2.33e+00 ph/cm2/s
90%_error_low -1.97e-01 -1.30e-01 -9.51e-02 -1.38e-01 -3.10e-01 -3.49e-01 ph/cm2/s
90%_error_hi 2.00e-01 1.37e-01 9.68e-02 2.63e-01 3.10e-01 4.21e-01 ph/cm2/s
======================================================================
Special notes of this burst