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 Sep 11 17:20:59 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger766081
======================================================================
Trigger: 00766081 Segment: 000
BAT Trigger Time: 523474246.644 [s; MET]
Trigger Stop: 523474246.708 [s; MET]
UTC: 2017-08-03T17:30:27.173280 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 174.949880933376 Dec: -16.3107712626632 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.73
Image Trigger?: NO
Rate S/N Ratio: 32.6036807738022 [ if not an image trigger ]
Image S/N Ratio: 10.73
Analysis Position: [ source = BAT ]
RA: 174.949880933376 Dec: -16.3107712626632 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 174.947690607081 Dec: -16.3112304817445 [deg; J2000]
{ 11h 39m 47.4s , -16d 18' 40.4" }
+/- 0.769239298439966 [arcmin] (estimated 90% radius based on SNR)
+/- 0.264968731410357 [arcmin] (formal 1-sigma fit error)
SNR: 44.2473961266501
Angular difference between the analysis and refined position is 0.129105 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 3.81999999284744 +/- 0.236812129310609
Measured from: -0.188000023365021
to: 3.63199996948242 [s; relative to TRIGTIME]
T50: 1.61199992895126 +/- 0.0809938026694786
Measured from: 0.216000020503998
to: 1.82799994945526 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.11599999666214
to: 0.88400000333786 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.691999971866608
to: 4.14399999380112 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.351271 0.572649 0.526022 0.116623
0.015775 0.017379 0.015858 0.011834 [error]
Peak 0.153312 0.286924 0.303703 0.082181
0.008281 0.010035 0.010110 0.006809 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 4.836 -0.692 4.144
T90 3.820 -0.188 3.632
T50 1.612 0.216 1.828
Peak 1.000 -0.116 0.884
====== 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: CPL)
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 -1.306 -0.060 0.060 - - - 2.22e-02 -7.55e-04 7.55e-04 55.070 57
CPL -0.749 -0.256 0.271 126.124 -23.965 58.118 3.96e-02 -9.03e-03 1.25e-02 40.420 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: CPL)
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 -1.102 -0.064 0.064 - - - 5.62e-02 -2.12e-03 2.12e-03 68.270 57
CPL -0.564 -0.259 0.275 153.929 -33.311 85.770 9.77e-02 -2.22e-02 3.05e-02 54.910 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 1.14e-07 2.37e-07 3.83e-07 1.39e-06 1.06e-06 2.12e-06 erg/cm2
90%_error_low -7.53e-09 -9.38e-09 -1.54e-08 -1.22e-07 -3.87e-08 -1.32e-07 erg/cm2
90%_error_hi 7.71e-09 9.34e-09 1.54e-08 1.30e-07 3.88e-08 1.38e-07 erg/cm2
Peak flux PL 4.30e-04 6.94e-03 8.08e-02 6.69e+00 3.53e-01 4.17e+00 ph/cm2/s
90%_error_low N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_hi N/A N/A N/A N/A N/A N/A ph/cm2/s
Fluence CPL 9.97e-08 2.45e-07 4.03e-07 7.15e-07 1.03e-06 1.46e-06 erg/cm2
90%_error_low -9.57e-09 -1.04e-08 -1.82e-08 -1.71e-07 -4.18e-08 -1.73e-07 erg/cm2
90%_error_hi 9.81e-09 1.05e-08 1.84e-08 2.39e-07 4.17e-08 2.37e-07 erg/cm2
Peak flux CPL 1.38e+00 2.08e+00 2.01e+00 1.90e+00 6.40e+00 7.36e+00 ph/cm2/s
90%_error_low -1.46e-01 -1.01e-01 -9.96e-02 -3.72e-01 -2.60e-01 -4.59e-01 ph/cm2/s
90%_error_hi 1.49e-01 1.01e-01 1.01e-01 4.83e-01 2.60e-01 5.38e-01 ph/cm2/s
======================================================================
Special notes of this burst