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: Wed Jan 22 20:01:13 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger156838
======================================================================
Trigger: 00156838 Segment: 000
BAT Trigger Time: 149331873.376 [s; MET]
Trigger Stop: 149331873.44 [s; MET]
UTC: 2005-09-25T09:04:33.628160 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 303.445191270095 Dec: 34.3345869373457 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.32
Image Trigger?: NO
Rate S/N Ratio: 32.3419232575925 [ if not an image trigger ]
Image S/N Ratio: 12.32
Analysis Position: [ source = BAT ]
RA: 303.445191270095 Dec: 34.3345869373457 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 303.487102165543 Dec: 34.3294762681033 [deg; J2000]
{ 20h 13m 56.9s , +34d 19' 46.1" }
+/- 1.51530577149535 [arcmin] (estimated 90% radius based on SNR)
+/- 0.783298449210249 [arcmin] (formal 1-sigma fit error)
SNR: 16.7981262463985
Angular difference between the analysis and refined position is 2.099077 arcmin
Partial Coding Fraction: 0.4140625 [ including projection effects ]
Duration
T90: 0.0920000076293945 +/- 0.0144222095322683
Measured from: -0.0319999754428864
to: 0.0600000321865082 [s; relative to TRIGTIME]
T50: 0.0439999997615814 +/- 0.0113137103534657
Measured from: -0.0039999783039093
to: 0.0400000214576721 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.48199999332428
to: 0.51800000667572 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.035999983549118
to: 0.0680000185966492 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.031026 0.051931 0.047176 0.006682
0.003937 0.004970 0.004791 0.002907 [error]
Peak 0.042505 0.069117 0.047615 0.003784
0.008807 0.009386 0.008560 0.006822 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 0.104 -0.036 0.068
T90 0.092 -0.032 0.060
T50 0.044 -0.004 0.040
Peak 1.000 -0.482 0.518
====== 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: N/A)
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 -1.695 -0.166 0.158 - - - 7.75e-02 -9.12e-03 9.06e-03 87.310 57
CPL 0.111 -0.804 0.945 63.800 -8.012 11.939 5.75e-01 -3.33e-01 9.89e-01 70.770 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 -1.733 -0.268 0.255 - - - 1.11e-02 -1.98e-03 1.96e-03 49.690 57
CPL -0.086 -1.182 1.607 55.054 -11.400 27.086 8.19e-02 -8.19e-02 4.89e-01 43.460 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 1.24e-08 2.02e-08 2.49e-08 6.09e-08 7.47e-08 1.18e-07 erg/cm2
90%_error_low -1.98e-09 -2.31e-09 -3.62e-09 -1.56e-08 -9.07e-09 -1.98e-08 erg/cm2
90%_error_hi 2.05e-09 2.30e-09 3.58e-09 1.80e-08 9.09e-09 2.14e-08 erg/cm2
Peak flux PL 5.70e-01 5.00e-01 3.01e-01 2.73e-01 1.49e+00 1.64e+00 ph/cm2/s
90%_error_low -1.36e-01 -8.38e-02 -6.67e-02 -1.01e-01 -2.48e-01 -2.72e-01 ph/cm2/s
90%_error_hi 1.44e-01 8.36e-02 6.67e-02 1.28e-01 2.48e-01 2.73e-01 ph/cm2/s
Fluence CPL N/A N/A N/A N/A N/A N/A erg/cm2
90%_error_low -1.98e-09 -2.31e-09 -3.62e-09 -1.56e-08 -9.07e-09 -1.98e-08 erg/cm2
90%_error_hi 2.05e-09 2.30e-09 3.58e-09 1.80e-08 9.09e-09 2.14e-08 erg/cm2
Peak flux CPL 4.45e-01 5.91e-01 3.33e-01 6.72e-02 1.42e+00 1.44e+00 ph/cm2/s
90%_error_low -1.59e-01 -1.08e-01 -8.50e-02 -6.72e-02 -2.51e-01 -2.57e-01 ph/cm2/s
90%_error_hi 1.68e-01 1.14e-01 8.43e-02 1.14e-01 2.52e-01 2.65e-01 ph/cm2/s
======================================================================
Special notes of this burst