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 18:55:49 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger850471
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Trigger: 00850471 Segment: 000
BAT Trigger Time: 554491762.048 [s; MET]
Trigger Stop: 554491762.56 [s; MET]
UTC: 2018-07-28T17:29:00.710460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 253.569321153668 Dec: -54.0307606838017 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.51
Image Trigger?: NO
Rate S/N Ratio: 19.6468827043885 [ if not an image trigger ]
Image S/N Ratio: 10.51
Analysis Position: [ source = BAT ]
RA: 253.569321153668 Dec: -54.0307606838017 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 253.573629224443 Dec: -54.037142488569 [deg; J2000]
{ 16h 54m 17.7s , -54d 02' 13.7" }
+/- 0.498594483330955 [arcmin] (estimated 90% radius based on SNR)
+/- 0.161336818625638 [arcmin] (formal 1-sigma fit error)
SNR: 82.206793742066
Angular difference between the analysis and refined position is 0.411904 arcmin
Partial Coding Fraction: 0.5703125 [ including projection effects ]
Duration
T90: 8.6839998960495 +/- 0.297321378474679
Measured from: 11.6720000505447
to: 20.3559999465942 [s; relative to TRIGTIME]
T50: 2.46399998664856 +/- 0.035777160144337
Measured from: 12.6840000152588
to: 15.1480000019073 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 12.6119999885559
to: 13.6119999885559 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.24399995803833
to: 36.5119999647141 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 18.317970 20.133705 11.806000 2.307044
0.102586 0.106955 0.087485 0.057004 [error]
Peak 4.769779 5.525946 3.453081 0.768668
0.046121 0.049667 0.040899 0.022944 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 36.756 -0.244 36.512
T90 8.684 11.672 20.356
T50 2.464 12.684 15.148
Peak 1.000 12.612 13.612
====== 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 -1.972 -0.026 0.026 - - - 8.88e-02 -1.19e-03 1.19e-03 44.770 57
CPL -1.908 -0.100 0.103 88.337 -24.649 -88.337 9.43e-02 -4.43e-03 9.20e-03 43.610 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 -1.879 -0.031 0.031 - - - 9.25e-01 -1.48e-02 1.48e-02 42.730 57
CPL -1.860 -0.048 0.120 430.784 N/A N/A 9.43e-01 N/A N/A 42.650 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 6.51e-06 8.98e-06 9.15e-06 1.70e-05 3.01e-05 4.16e-05 erg/cm2
90%_error_low -1.98e-07 -1.61e-07 -1.29e-07 -5.55e-07 -4.13e-07 -6.03e-07 erg/cm2
90%_error_hi 2.01e-07 1.61e-07 1.29e-07 5.68e-07 4.13e-07 6.07e-07 erg/cm2
Peak flux PL 5.49e+01 4.42e+01 2.40e+01 1.91e+01 1.32e+02 1.42e+02 ph/cm2/s
90%_error_low -1.94e+00 -9.28e-01 -4.23e-01 -7.33e-01 -2.85e+00 -2.70e+00 ph/cm2/s
90%_error_hi 1.98e+00 9.28e-01 4.22e-01 7.50e-01 2.87e+00 2.72e+00 ph/cm2/s
Fluence CPL 6.37e-06 8.98e-06 9.21e-06 1.60e-05 2.99e-05 4.05e-05 erg/cm2
90%_error_low -2.85e-07 -1.62e-07 -1.59e-07 -1.51e-06 -4.64e-07 -1.65e-06 erg/cm2
90%_error_hi 2.78e-07 1.62e-07 1.59e-07 1.23e-06 4.65e-07 1.43e-06 erg/cm2
Peak flux CPL N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_low -1.94e+00 -9.28e-01 -4.23e-01 -7.33e-01 -2.85e+00 -2.70e+00 ph/cm2/s
90%_error_hi 1.98e+00 9.28e-01 4.22e-01 7.50e-01 2.87e+00 2.72e+00 ph/cm2/s
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