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.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time: Fri Oct 19 18:38:35 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger853882
======================================================================
Trigger: 00853882 Segment: 000
BAT Trigger Time: 556288240 [s; MET]
Trigger Stop: 556288368 [s; MET]
UTC: 2018-08-18T12:30:18.552260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 104.235169748593 Dec: 39.328619125846 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.17
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.17
Analysis Position: [ source = BAT ]
RA: 104.235169748593 Dec: 39.328619125846 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 104.2255323748 Dec: 39.3103621957179 [deg; J2000]
{ 06h 56m 54.1s , +39d 18' 37.3" }
+/- 1.65256145493132 [arcmin] (estimated 90% radius based on SNR)
+/- 0.687718571376997 [arcmin] (formal 1-sigma fit error)
SNR: 14.8410503592937
Angular difference between the analysis and refined position is 1.183238 arcmin
Partial Coding Fraction: 0.890625 [ including projection effects ]
Duration
T90: 137.459999918938 +/- 9.7000667230781
Measured from: -89.7120000123978
to: 47.7479999065399 [s; relative to TRIGTIME]
T50: 110.439999938011 +/- 4.47276741178899
Measured from: -80.9279999732971
to: 29.5119999647141 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -82.1119999885559
to: -81.1119999885559 [s; relative to TRIGTIME]
Total Fluence
Measured from: -93.5800000429153
to: 62.7439999580383 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.225750 1.678227 0.883426 0.149702
0.087604 0.090779 0.078307 0.068087 [error]
Peak 0.043025 0.066838 0.023112 0.017085
0.007485 0.008200 0.006842 0.005706 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 156.324 -93.580 62.744
T90 137.460 -89.712 47.748
T50 110.440 -80.928 29.512
Peak 1.000 -82.112 -81.112
====== 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 -1.772 -0.121 0.119 - - - 1.60e-03 -1.20e-04 1.19e-04 49.260 57
CPL -1.044 -0.519 0.598 59.130 -10.649 37.451 4.00e-03 -1.89e-03 4.45e-03 43.260 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 -1.732 -0.295 0.285 - - - 8.62e-03 -1.62e-03 1.57e-03 64.110 57
CPL -1.736 1.736 1.013 9998.880 N/A N/A 8.60e-03 N/A N/A 64.110 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 4.13e-07 6.43e-07 7.54e-07 1.71e-06 2.31e-06 3.52e-06 erg/cm2
90%_error_low -4.27e-08 -4.34e-08 -7.56e-08 -3.27e-07 -1.77e-07 -4.03e-07 erg/cm2
90%_error_hi 4.38e-08 4.34e-08 7.59e-08 3.75e-07 1.79e-07 4.40e-07 erg/cm2
Peak flux PL 4.44e-01 3.89e-01 2.34e-01 2.13e-01 1.16e+00 1.28e+00 ph/cm2/s
90%_error_low -1.07e-01 -6.35e-02 -5.64e-02 -8.54e-02 -1.88e-01 -2.12e-01 ph/cm2/s
90%_error_hi 1.11e-01 6.34e-02 5.67e-02 1.16e-01 1.88e-01 2.13e-01 ph/cm2/s
Fluence CPL 3.78e-07 6.98e-07 7.54e-07 5.76e-07 2.16e-06 2.41e-06 erg/cm2
90%_error_low -4.97e-08 -5.77e-08 -8.62e-08 -2.91e-07 -2.03e-07 -3.57e-07 erg/cm2
90%_error_hi 5.02e-08 5.95e-08 8.42e-08 6.25e-07 2.07e-07 6.43e-07 erg/cm2
Peak flux CPL 4.45e-01 3.86e-01 2.33e-01 2.15e-01 1.16e+00 1.28e+00 ph/cm2/s
90%_error_low -1.12e-01 -5.99e-02 -5.55e-02 -1.18e-01 -1.89e-01 -2.63e-01 ph/cm2/s
90%_error_hi 1.13e-01 1.09e-01 5.73e-02 1.13e-01 1.88e-01 2.10e-01 ph/cm2/s
======================================================================
Special notes of this burst