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 v2.48
Process Start Time: Wed Sep 9 23:02:24 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger981957
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Trigger: 00981957 Segment: 000
BAT Trigger Time: 616158301.76 [s; MET]
Trigger Stop: 616158302.784 [s; MET]
UTC: 2020-07-11T11:04:36.495000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 285.976650447479 Dec: -0.136296528746014 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.78
Image Trigger?: NO
Rate S/N Ratio: 65.9621103361619 [ if not an image trigger ]
Image S/N Ratio: 6.78
Analysis Position: [ source = BAT ]
RA: 285.976650447479 Dec: -0.136296528746014 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 285.974051212983 Dec: -0.134789313063288 [deg; J2000]
{ 19h 03m 53.8s , -00d 08' 05.2" }
+/- 1.47543784963379 [arcmin] (estimated 90% radius based on SNR)
+/- 0.755725633300015 [arcmin] (formal 1-sigma fit error)
SNR: 17.4502952571786
Angular difference between the analysis and refined position is 0.180277 arcmin
Partial Coding Fraction: 0.08691406 [ including projection effects ]
Duration
T90: 29.3600000143051 +/- 3.07170836177462
Measured from: -3.26399993896484
to: 26.0960000753403 [s; relative to TRIGTIME]
T50: 16.960000038147 +/- 1.53101285943251
Measured from: -0.25600004196167
to: 16.7039999961853 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.195999979972839
to: 1.19599997997284 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.72000002861023
to: 29.7280000448227 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.959453 2.864675 2.427948 0.678822
0.153755 0.161666 0.144052 0.117082 [error]
Peak 0.146726 0.390617 0.345471 0.135351
0.036365 0.041097 0.042464 0.035365 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 34.448 -4.720 29.728
T90 29.360 -3.264 26.096
T50 16.960 -0.256 16.704
Peak 1.000 0.196 1.196
====== 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 -1.414 -0.104 0.104 - - - 1.59e-02 -9.51e-04 9.50e-04 55.780 57
CPL -1.094 -0.363 0.440 152.810 -59.314 -152.810 2.25e-02 -7.12e-03 1.34e-02 53.940 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 -1.123 -0.206 0.209 - - - 6.63e-02 -8.48e-03 8.48e-03 62.810 57
CPL -0.121 -0.876 1.117 99.876 -27.865 267.911 2.01e-01 -1.23e-01 4.77e-01 58.890 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 6.45e-07 1.25e-06 1.88e-06 6.09e-06 5.28e-06 9.86e-06 erg/cm2
90%_error_low -7.02e-08 -8.35e-08 -1.37e-07 -9.26e-07 -3.40e-07 -1.03e-06 erg/cm2
90%_error_hi 7.28e-08 8.31e-08 1.37e-07 1.03e-06 3.41e-07 1.11e-06 erg/cm2
Peak flux PL 4.51e-04 6.92e-03 7.63e-02 6.81e+00 2.61e-01 6.82e+00 ph/cm2/s
90%_error_low 3.32e-05 -9.08e-04 -8.49e-03 -9.03e-01 4.62e-02 -8.40e-01 ph/cm2/s
90%_error_hi 3.72e-04 2.76e-03 2.95e-02 1.64e+00 2.09e-01 1.76e+00 ph/cm2/s
Fluence CPL 5.18e-07 7.17e-07 7.68e-07 1.88e-06 2.51e-06 3.88e-06 erg/cm2
90%_error_low -3.31e-08 -3.17e-07 -1.36e-07 -1.73e-07 -4.60e-07 -5.51e-07 erg/cm2
90%_error_hi 7.55e-08 7.21e-08 1.25e-07 1.75e-07 4.49e-06 4.98e-07 erg/cm2
Peak flux CPL 1.54e+00 2.60e+00 2.44e+00 1.42e+00 7.48e+00 8.00e+00 ph/cm2/s
90%_error_low -4.99e-01 -4.20e-01 -3.89e-01 -7.91e-01 -1.02e+00 -1.31e+00 ph/cm2/s
90%_error_hi 5.44e-01 4.38e-01 4.02e-01 1.72e+00 1.02e+00 1.84e+00 ph/cm2/s
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