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 Mar 2 16:28:18 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger808625
======================================================================
Trigger: 00808625 Segment: 000
BAT Trigger Time: 539497549.76 [s; MET]
Trigger Stop: 539497550.272 [s; MET]
UTC: 2018-02-05T04:25:29.331960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 126.806396594374 Dec: 11.5396155071366 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.76
Image Trigger?: NO
Rate S/N Ratio: 23.1516738055805 [ if not an image trigger ]
Image S/N Ratio: 10.76
Analysis Position: [ source = BAT ]
RA: 126.806396594374 Dec: 11.5396155071366 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 126.819327604964 Dec: 11.5361858423513 [deg; J2000]
{ 08h 27m 16.6s , +11d 32' 10.3" }
+/- 1.0956932438053 [arcmin] (estimated 90% radius based on SNR)
+/- 0.514599591438998 [arcmin] (formal 1-sigma fit error)
SNR: 26.6943795907834
Angular difference between the analysis and refined position is 0.787542 arcmin
Partial Coding Fraction: 0.5 [ including projection effects ]
Duration
T90: 15.5359998941422 +/- 3.14699346489193
Measured from: -6.31599998474121
to: 9.21999990940094 [s; relative to TRIGTIME]
T50: 6.11199998855591 +/- 0.598264161410583
Measured from: -4.69200003147125
to: 1.41999995708466 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.195999979972839
to: 0.804000020027161 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.0440000295639
to: 10.8680000305176 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.754907 0.732596 0.396065 0.059204
0.038867 0.040049 0.033652 0.027988 [error]
Peak 0.123548 0.152514 0.108165 0.017881
0.011139 0.011644 0.010116 0.007477 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 17.912 -7.044 10.868
T90 15.536 -6.316 9.220
T50 6.112 -4.692 1.420
Peak 1.000 -0.196 0.804
====== 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 -2.036 -0.128 0.124 - - - 6.16e-03 -4.83e-04 4.76e-04 58.360 57
CPL -1.827 -0.282 0.509 36.545 N/A N/A 8.05e-03 N/A N/A 57.770 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 -1.725 -0.146 0.142 - - - 2.52e-02 -2.31e-03 2.28e-03 68.730 57
CPL -1.053 -0.572 0.653 68.420 -15.014 98.810 5.62e-02 -2.74e-02 6.41e-02 64.630 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 2.34e-07 3.10e-07 3.03e-07 5.28e-07 1.02e-06 1.37e-06 erg/cm2
90%_error_low -2.25e-08 -1.96e-08 -3.28e-08 -1.08e-07 -7.41e-08 -1.43e-07 erg/cm2
90%_error_hi 2.30e-08 1.96e-08 3.31e-08 1.25e-07 7.49e-08 1.56e-07 erg/cm2
Peak flux PL 1.29e+00 1.13e+00 6.86e-01 6.27e-01 3.37e+00 3.73e+00 ph/cm2/s
90%_error_low -1.67e-01 -9.70e-02 -8.04e-02 -1.34e-01 -2.87e-01 -3.14e-01 ph/cm2/s
90%_error_hi 1.73e-01 9.68e-02 8.00e-02 1.53e-01 2.87e-01 3.14e-01 ph/cm2/s
Fluence CPL N/A N/A N/A N/A N/A N/A erg/cm2
90%_error_low -2.25e-08 -1.96e-08 -3.28e-08 -1.08e-07 -7.41e-08 -1.43e-07 erg/cm2
90%_error_hi 2.30e-08 1.96e-08 3.31e-08 1.25e-07 7.49e-08 1.56e-07 erg/cm2
Peak flux CPL 1.15e+00 1.21e+00 7.20e-01 3.13e-01 3.29e+00 3.40e+00 ph/cm2/s
90%_error_low -2.02e-01 -1.18e-01 -9.03e-02 -1.39e-01 -2.97e-01 -3.38e-01 ph/cm2/s
90%_error_hi 2.05e-01 1.21e-01 9.22e-02 2.55e-01 2.96e-01 3.75e-01 ph/cm2/s
======================================================================
Special notes of this burst