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 17:56:18 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger867987
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Trigger: 00867987 Segment: 000
BAT Trigger Time: 561754855.296 [s; MET]
Trigger Stop: 561754855.424 [s; MET]
UTC: 2018-10-20T19:00:33.510100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 13.9670984422145 Dec: -47.3799961910664 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.26
Image Trigger?: NO
Rate S/N Ratio: 28.9309522829789 [ if not an image trigger ]
Image S/N Ratio: 8.26
Analysis Position: [ source = BAT ]
RA: 13.9670984422145 Dec: -47.3799961910664 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 13.9856438394844 Dec: -47.3719623592739 [deg; J2000]
{ 00h 55m 56.6s , -47d 22' 19.1" }
+/- 0.564057571401366 [arcmin] (estimated 90% radius based on SNR)
+/- 0.137267062245579 [arcmin] (formal 1-sigma fit error)
SNR: 68.9240229394993
Angular difference between the analysis and refined position is 0.894508 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 238.015999913216 +/- 11.5988104904574
Measured from: 0.796000003814697
to: 238.81199991703 [s; relative to TRIGTIME]
T50: 16.0719999074936 +/- 4.86733609384869
Measured from: 4.51999998092651
to: 20.5919998884201 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.26399993896484
to: 8.26399993896484 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.44799995422363
to: 271.203999996185 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.022382 4.375695 3.958866 1.073056
0.110750 0.117662 0.108420 0.104210 [error]
Peak 0.174326 0.335363 0.390363 0.129826
0.010213 0.012815 0.013912 0.011623 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 272.652 -1.448 271.204
T90 238.016 0.796 238.812
T50 16.072 4.520 20.592
Peak 1.000 7.264 8.264
====== 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 -1.254 -0.060 0.060 - - - 2.96e-03 -9.07e-05 9.07e-05 52.470 57
CPL -1.159 -0.121 0.238 495.380 -495.380 -495.380 3.27e-03 -4.92e-04 8.88e-04 51.970 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 -0.863 -0.074 0.075 - - - 6.67e-02 -2.72e-03 2.71e-03 67.150 57
CPL -0.687 -0.224 0.305 437.420 -437.420 -437.420 7.96e-02 -1.50e-02 2.73e-02 66.060 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 8.19e-07 1.75e-06 2.94e-06 1.13e-05 8.08e-06 1.68e-05 erg/cm2
90%_error_low -5.23e-08 -6.43e-08 -1.10e-07 -9.68e-07 -2.73e-07 -1.03e-06 erg/cm2
90%_error_hi 5.36e-08 6.40e-08 1.09e-07 1.03e-06 2.74e-07 1.08e-06 erg/cm2
Peak flux PL 1.50e+00 2.21e+00 2.42e+00 5.01e+00 7.66e+00 1.11e+01 ph/cm2/s
90%_error_low -1.28e-01 -1.13e-01 -1.09e-01 -4.89e-01 -3.11e-01 -5.47e-01 ph/cm2/s
90%_error_hi 1.32e-01 1.13e-01 1.08e-01 5.24e-01 3.11e-01 5.62e-01 ph/cm2/s
Fluence CPL 8.00e-07 1.76e-06 2.96e-06 9.83e-06 8.02e-06 1.53e-05 erg/cm2
90%_error_low -6.83e-08 -6.45e-08 -1.22e-07 -2.68e-06 -3.07e-07 -2.68e-06 erg/cm2
90%_error_hi 5.48e-08 6.84e-08 1.23e-07 1.23e-06 3.04e-07 1.71e-06 erg/cm2
Peak flux CPL 1.43e+00 2.22e+00 2.48e+00 4.16e+00 7.60e+00 1.03e+01 ph/cm2/s
90%_error_low -1.69e-01 -1.18e-01 -1.35e-01 -1.06e+00 -3.25e-01 -1.11e+00 ph/cm2/s
90%_error_hi 2.39e-01 1.18e-01 1.36e-01 1.05e+00 3.25e-01 1.06e+00 ph/cm2/s
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