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: Sat Jan 20 04:59:48 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger785850
======================================================================
Trigger: 00785850 Segment: 000
BAT Trigger Time: 531443452.012 [s; MET]
Trigger Stop: 531443452.076 [s; MET]
UTC: 2017-11-03T23:10:32.067600 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 249.535607366346 Dec: -10.2151202797463 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.35
Image Trigger?: NO
Rate S/N Ratio: 77.2657750883274 [ if not an image trigger ]
Image S/N Ratio: 9.35
Analysis Position: [ source = BAT ]
RA: 249.535607366346 Dec: -10.2151202797463 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 249.507007896054 Dec: -10.2058206757051 [deg; J2000]
{ 16h 38m 01.7s , -10d 12' 21.0" }
+/- 1.45945826552915 [arcmin] (estimated 90% radius based on SNR)
+/- 0.596209037451503 [arcmin] (formal 1-sigma fit error)
SNR: 17.7238814480927
Angular difference between the analysis and refined position is 1.778583 arcmin
Partial Coding Fraction: 0.65625 [ including projection effects ]
Duration
T90: 4.26799994707108 +/- 1.10585354557227
Measured from: -0.324000000953674
to: 3.9439999461174 [s; relative to TRIGTIME]
T50: 0.327999949455261 +/- 1.07674321374998
Measured from: 0
to: 0.327999949455261 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.37200003862381
to: 0.62799996137619 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.37200003862381
to: 4.66799998283386 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.149025 0.205633 0.169379 0.084103
0.019816 0.019517 0.017791 0.015419 [error]
Peak 0.101494 0.157882 0.153299 0.065094
0.010450 0.011311 0.011212 0.009773 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 5.040 -0.372 4.668
T90 4.268 -0.324 3.944
T50 0.328 0.000 0.328
Peak 1.000 -0.372 0.628
====== 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 -1.322 -0.184 0.185 - - - 7.60e-03 -7.63e-04 7.60e-04 59.520 57
CPL -1.325 -0.179 0.241 9999.360 -9999.360 -9999.360 7.62e-03 -2.71e-03 5.10e-03 59.530 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 -1.153 -0.135 0.136 - - - 3.06e-02 -2.29e-03 2.29e-03 56.580 57
CPL -1.151 -0.134 0.140 9999.350 -9999.350 -9999.350 3.07e-02 -2.28e-03 1.71e-02 56.600 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 4.14e-08 8.49e-08 1.36e-07 4.85e-07 3.77e-07 7.47e-07 erg/cm2
90%_error_low -7.57e-09 -9.39e-09 -1.75e-08 -1.26e-07 -4.26e-08 -1.39e-07 erg/cm2
90%_error_hi 7.97e-09 9.26e-09 1.73e-08 1.55e-07 4.30e-08 1.64e-07 erg/cm2
Peak flux PL 9.05e-01 1.12e+00 1.01e+00 1.57e+00 3.57e+00 4.60e+00 ph/cm2/s
90%_error_low -1.29e-01 -9.82e-02 -9.04e-02 -2.85e-01 -2.71e-01 -3.77e-01 ph/cm2/s
90%_error_hi 1.35e-01 9.70e-02 8.96e-02 3.25e-01 2.71e-01 3.86e-01 ph/cm2/s
Fluence CPL 4.14e-08 8.33e-08 1.34e-07 4.82e-07 3.81e-07 7.55e-07 erg/cm2
90%_error_low N/A N/A N/A N/A N/A -2.72e-07 erg/cm2
90%_error_hi N/A N/A N/A N/A N/A 6.36e-08 erg/cm2
Peak flux CPL 9.04e-01 1.12e+00 1.01e+00 1.56e+00 3.58e+00 4.63e+00 ph/cm2/s
90%_error_low N/A -9.92e-02 -8.90e-02 N/A N/A -7.23e-01 ph/cm2/s
90%_error_hi N/A 1.05e-01 9.67e-02 N/A N/A 3.32e-01 ph/cm2/s
======================================================================
Special notes of this burst