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.
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BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time: Mon Jan 20 02:04:31 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger311762
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Trigger: 00311762 Segment: 000
BAT Trigger Time: 232589829.824 [s; MET]
Trigger Stop: 232589830.336 [s; MET]
UTC: 2008-05-16T00:17:07.030760 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 120.629533847551 Dec: -26.1760175623149 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.61
Image Trigger?: NO
Rate S/N Ratio: 15.0665191733194 [ if not an image trigger ]
Image S/N Ratio: 8.61
Analysis Position: [ source = BAT ]
RA: 120.629533847551 Dec: -26.1760175623149 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 120.661366398219 Dec: -26.1488751984184 [deg; J2000]
{ 08h 02m 38.7s , -26d 08' 56.0" }
+/- 2.17010907859261 [arcmin] (estimated 90% radius based on SNR)
+/- 1.21551020393041 [arcmin] (formal 1-sigma fit error)
SNR: 10.0561196413796
Angular difference between the analysis and refined position is 2.364505 arcmin
Partial Coding Fraction: 0.3828125 [ including projection effects ]
Duration
T90: 5.76400002837181 +/- 0.223212908197741
Measured from: 0.15599998831749
to: 5.9200000166893 [s; relative to TRIGTIME]
T50: 5.0160000026226 +/- 0.415716250511535
Measured from: 0.444000005722046
to: 5.46000000834465 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0519999861717224
to: 1.05199998617172 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0839999914169312
to: 6.05599999427795 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.142337 0.167476 0.096463 0.016133
0.021073 0.022218 0.019634 0.016992 [error]
Peak 0.041052 0.080558 0.057517 0.010654
0.009324 0.010127 0.008997 0.007418 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 5.972 0.084 6.056
T90 5.764 0.156 5.920
T50 5.016 0.444 5.460
Peak 1.000 0.052 1.052
====== 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 -1.820 -0.271 0.255 - - - 4.86e-03 -8.18e-04 7.94e-04 59.140 57
CPL -1.557 -0.700 1.188 76.567 -76.355 -76.567 6.78e-03 N/A N/A 58.930 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 -1.457 -0.232 0.231 - - - 1.37e-02 -2.02e-03 2.01e-03 63.890 57
CPL -0.268 -1.066 1.454 71.259 -18.082 164.643 5.64e-02 -5.64e-02 2.58e-01 60.190 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 5.01e-08 7.58e-08 8.59e-08 1.85e-07 2.67e-07 3.97e-07 erg/cm2
90%_error_low -1.05e-08 -1.08e-08 -1.93e-08 -7.26e-08 -4.47e-08 -9.46e-08 erg/cm2
90%_error_hi 1.10e-08 1.08e-08 1.94e-08 9.77e-08 4.55e-08 1.14e-07 erg/cm2
Peak flux PL 5.43e-01 5.60e-01 4.08e-01 4.78e-01 1.70e+00 1.99e+00 ph/cm2/s
90%_error_low -1.28e-01 -8.83e-02 -7.19e-02 -1.48e-01 -2.52e-01 -2.92e-01 ph/cm2/s
90%_error_hi 1.36e-01 8.74e-02 7.12e-02 1.82e-01 2.53e-01 2.93e-01 ph/cm2/s
Fluence CPL 4.87e-08 7.84e-08 8.64e-08 1.19e-07 2.61e-07 3.32e-07 erg/cm2
90%_error_low -1.21e-08 -1.29e-08 -2.04e-08 -9.37e-08 -4.97e-08 -1.10e-07 erg/cm2
90%_error_hi 1.21e-08 1.48e-08 2.05e-08 1.27e-07 4.49e-08 1.12e-07 erg/cm2
Peak flux CPL 4.47e-01 6.31e-01 4.45e-01 1.56e-01 1.64e+00 1.68e+00 ph/cm2/s
90%_error_low -1.50e-01 -1.12e-01 -8.60e-02 -1.06e-01 -2.60e-01 -2.85e-01 ph/cm2/s
90%_error_hi 1.59e-01 1.19e-01 8.73e-02 2.67e-01 2.59e-01 3.33e-01 ph/cm2/s
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