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: Fri Oct 19 18:32:47 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger854578
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Trigger: 00854578 Segment: 000
BAT Trigger Time: 556562456 [s; MET]
Trigger Stop: 556562576 [s; MET]
UTC: 2018-08-21T16:40:34.535440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 7.76306090448872 Dec: -38.6188964142254 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.81
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.81
Analysis Position: [ source = BAT ]
RA: 7.76306090448872 Dec: -38.6188964142254 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 7.73884973621716 Dec: -38.6110706160199 [deg; J2000]
{ 00h 30m 57.3s , -38d 36' 39.9" }
+/- 2.31879286945561 [arcmin] (estimated 90% radius based on SNR)
+/- 1.1733489518204 [arcmin] (formal 1-sigma fit error)
SNR: 9.14777734485812
Angular difference between the analysis and refined position is 1.228342 arcmin
Partial Coding Fraction: 0.1757812 [ including projection effects ]
Duration
T90: 64 +/- 22.6274169979695
Measured from: 1
to: 65 [s; relative to TRIGTIME]
T50: 32 +/- 16
Measured from: 17
to: 49 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 56.5
to: 57.5 [s; relative to TRIGTIME]
Total Fluence
Measured from: 1
to: 65 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.744472 0.748213 0.689712 -0.002614
0.127149 0.131331 0.113710 0.094822 [error]
Peak 0.008439 0.023352 0.031360 -0.014636
0.014743 0.015956 0.015483 0.011746 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 64.000 1.000 65.000
T90 64.000 1.000 65.000
T50 32.000 17.000 49.000
Peak 1.000 56.500 57.500
====== 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 -1.784 -0.311 0.293 - - - 2.48e-03 -4.52e-04 4.38e-04 57.060 57
CPL -1.789 -0.353 0.300 9999.360 -9999.350 -9999.360 2.47e-03 -2.47e-03 7.03e-03 57.060 56
=== 1-s peak 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 -2.309 2.309 2.309 - - - 1.58e-03 -1.58e-03 2.74e-03 68.880 57
CPL 4.269 -6.253 -4.269 59.570 -23.059 27.226 1.14e+00 -1.14e+00 4.06e+05 66.480 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 2.64e-07 4.09e-07 4.75e-07 1.06e-06 1.46e-06 2.21e-06 erg/cm2
90%_error_low -6.68e-08 -6.72e-08 -1.16e-07 -4.54e-07 -2.68e-07 -5.79e-07 erg/cm2
90%_error_hi 7.09e-08 6.69e-08 1.14e-07 6.25e-07 2.71e-07 7.05e-07 erg/cm2
Peak flux PL 1.42e-01 8.93e-02 3.62e-02 1.99e-02 2.77e-01 2.87e-01 ph/cm2/s
90%_error_low -1.42e-01 -8.93e-02 -3.62e-02 -1.99e-02 -2.77e-01 -2.87e-01 ph/cm2/s
90%_error_hi 2.56e-01 1.33e-01 7.61e-02 1.65e-01 4.10e-01 4.24e-01 ph/cm2/s
Fluence CPL 2.65e-07 4.08e-07 4.73e-07 1.08e-06 1.46e-06 2.13e-06 erg/cm2
90%_error_low -4.74e-08 -6.46e-08 -1.30e-07 -5.51e-07 -2.49e-07 -8.22e-07 erg/cm2
90%_error_hi 7.28e-08 6.85e-08 1.31e-07 3.66e-07 2.26e-07 6.48e-07 erg/cm2
Peak flux CPL 2.43e-03 8.60e-02 1.80e-01 5.30e-03 2.65e-01 2.63e-01 ph/cm2/s
90%_error_low N/A -8.60e-02 N/A -5.30e-03 -2.65e-01 -2.63e-01 ph/cm2/s
90%_error_hi N/A 2.49e-01 N/A 4.23e-02 3.96e-01 3.98e-01 ph/cm2/s
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