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: Sun Jan 19 21:18:18 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger332851
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Trigger: 00332851 Segment: 000
BAT Trigger Time: 246846304 [s; MET]
Trigger Stop: 246846432 [s; MET]
UTC: 2008-10-28T00:25:00.790760 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 121.890264700736 Dec: 2.31110706505449 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17.95
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 17.95
Analysis Position: [ source = BAT ]
RA: 121.890264700736 Dec: 2.31110706505449 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 121.889592537456 Dec: 2.30536988059391 [deg; J2000]
{ 08h 07m 33.5s , +02d 18' 19.3" }
+/- 1.16676468691905 [arcmin] (estimated 90% radius based on SNR)
+/- 0.637722226404538 [arcmin] (formal 1-sigma fit error)
SNR: 24.4021439745795
Angular difference between the analysis and refined position is 0.346582 arcmin
Partial Coding Fraction: 0.859375 [ including projection effects ]
Duration
T90: 284.423999994993 +/- 30.548726983597
Measured from: 50.6480000019073
to: 335.071999996901 [s; relative to TRIGTIME]
T50: 135.004000008106 +/- 7.69633783266073
Measured from: 90.1680000126362
to: 225.172000020742 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 73.7240000069141
to: 74.7240000069141 [s; relative to TRIGTIME]
Total Fluence
Measured from: 29.3440000116825
to: 397.087999999523 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.223726 2.802350 1.692750 0.244879
0.090422 0.094498 0.084349 0.076247 [error]
Peak 0.018467 0.027558 0.016355 0.005247
0.005119 0.005287 0.004531 0.004235 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 367.744 29.344 397.088
T90 284.424 50.648 335.072
T50 135.004 90.168 225.172
Peak 1.000 73.724 74.724
====== 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 -1.774 -0.083 0.082 - - - 1.16e-03 -5.46e-05 5.43e-05 42.820 57
CPL -1.404 -0.317 0.343 75.248 -17.108 142.590 1.82e-03 -5.67e-04 9.17e-04 38.800 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 -1.639 -0.396 0.373 - - - 4.39e-03 -1.06e-03 1.03e-03 39.790 57
CPL -0.889 -1.320 2.436 68.372 -61.600 -68.372 1.11e-02 -1.11e-02 1.98e-01 39.210 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 7.07e-07 1.10e-06 1.29e-06 2.91e-06 3.95e-06 6.00e-06 erg/cm2
90%_error_low -5.06e-08 -4.77e-08 -8.30e-08 -3.81e-07 -1.90e-07 -4.53e-07 erg/cm2
90%_error_hi 5.18e-08 4.77e-08 8.33e-08 4.19e-07 1.92e-07 4.83e-07 erg/cm2
Peak flux PL 2.07e-01 1.91e-01 1.23e-01 1.22e-01 5.71e-01 6.43e-01 ph/cm2/s
90%_error_low -6.62e-02 -4.16e-02 -3.80e-02 -6.08e-02 -1.22e-01 -1.41e-01 ph/cm2/s
90%_error_hi 7.10e-02 4.14e-02 3.80e-02 8.92e-02 1.22e-01 1.43e-01 ph/cm2/s
Fluence CPL 6.68e-07 1.14e-06 1.29e-06 1.61e-06 3.80e-06 4.71e-06 erg/cm2
90%_error_low -6.01e-08 -5.77e-08 -8.78e-08 -6.02e-07 -2.27e-07 -6.52e-07 erg/cm2
90%_error_hi 6.09e-08 5.85e-08 8.78e-08 1.04e-06 2.29e-07 1.06e-06 erg/cm2
Peak flux CPL 1.86e-01 2.07e-01 1.27e-01 5.16e-02 5.55e-01 5.72e-01 ph/cm2/s
90%_error_low -8.47e-02 -5.38e-02 N/A -5.16e-02 -1.29e-01 -1.44e-01 ph/cm2/s
90%_error_hi 8.31e-02 5.83e-02 N/A 9.17e-02 1.28e-01 1.52e-01 ph/cm2/s
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