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 Dec 17 14:29:32 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger874334
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Trigger: 00874334 Segment: 000
BAT Trigger Time: 565425406.528 [s; MET]
Trigger Stop: 565425408.576 [s; MET]
UTC: 2018-12-02T06:36:24.513620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 280.744790864843 Dec: 27.9509889258757 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.16
Image Trigger?: NO
Rate S/N Ratio: 10.9087121146357 [ if not an image trigger ]
Image S/N Ratio: 7.16
Analysis Position: [ source = BAT ]
RA: 280.744790864843 Dec: 27.9509889258757 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 280.737410651891 Dec: 27.9774947742065 [deg; J2000]
{ 18h 42m 57.0s , +27d 58' 39.0" }
+/- 2.01008740074281 [arcmin] (estimated 90% radius based on SNR)
+/- 1.06590351771688 [arcmin] (formal 1-sigma fit error)
SNR: 11.2190007734011
Angular difference between the analysis and refined position is 1.637737 arcmin
Partial Coding Fraction: 0.9609375 [ including projection effects ]
Duration
T90: 6.55999994277954 +/- 0.615337295582842
Measured from: 0.0199999809265137
to: 6.57999992370605 [s; relative to TRIGTIME]
T50: 4.46399998664856 +/- 0.704965200460832
Measured from: 1.05599999427795
to: 5.51999998092651 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.692000031471252
to: 1.69200003147125 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.25600004196167
to: 6.75600004196167 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.128191 0.170022 0.121657 0.019008
0.020796 0.021180 0.018348 0.016011 [error]
Peak 0.039340 0.046937 0.022741 0.006182
0.008107 0.008402 0.007179 0.006133 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 7.012 -0.256 6.756
T90 6.560 0.020 6.580
T50 4.464 1.056 5.520
Peak 1.000 0.692 1.692
====== 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 -1.602 -0.247 0.239 - - - 3.79e-03 -5.81e-04 5.71e-04 48.110 57
CPL -0.988 -0.779 1.086 76.108 -26.576 -76.108 8.12e-03 -4.74e-03 2.24e-02 46.750 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 -1.768 -0.360 0.334 - - - 6.63e-03 -1.61e-03 1.57e-03 65.980 57
CPL 0.282 -1.876 2.961 46.047 -10.430 54.402 1.01e-01 -1.01e-01 4.39e+00 62.440 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 3.73e-08 6.45e-08 8.49e-08 2.28e-07 2.48e-07 4.14e-07 erg/cm2
90%_error_low -7.82e-09 -8.99e-09 -1.72e-08 -8.24e-08 -4.07e-08 -1.01e-07 erg/cm2
90%_error_hi 8.15e-09 8.97e-09 1.73e-08 1.09e-07 4.17e-08 1.23e-07 erg/cm2
Peak flux PL 3.53e-01 3.04e-01 1.78e-01 1.57e-01 9.03e-01 9.92e-01 ph/cm2/s
90%_error_low -9.83e-02 -6.17e-02 -5.44e-02 -7.55e-02 -1.83e-01 -2.07e-01 ph/cm2/s
90%_error_hi 1.03e-01 6.17e-02 5.56e-02 1.08e-01 1.83e-01 2.10e-01 ph/cm2/s
Fluence CPL 3.46e-08 6.93e-08 8.61e-08 8.88e-08 2.35e-07 2.79e-07 erg/cm2
90%_error_low -9.05e-09 -1.09e-08 -1.91e-08 -6.37e-08 -4.40e-08 -7.96e-08 erg/cm2
90%_error_hi 9.10e-09 1.19e-08 1.90e-08 1.29e-07 4.59e-08 1.82e-07 erg/cm2
Peak flux CPL 2.89e-01 3.79e-01 1.69e-01 1.79e-02 8.53e-01 8.55e-01 ph/cm2/s
90%_error_low -1.28e-01 -9.23e-02 -7.11e-02 -1.79e-02 -1.87e-01 -1.88e-01 ph/cm2/s
90%_error_hi 1.23e-01 9.64e-02 7.02e-02 1.08e-01 1.88e-01 1.96e-01 ph/cm2/s
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