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: Thu Apr 5 17:46:10 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger811074
======================================================================
Trigger: 00811074 Segment: 000
BAT Trigger Time: 540887465.344 [s; MET]
Trigger Stop: 540887481.728 [s; MET]
UTC: 2018-02-21T06:30:44.832320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 326.772376374209 Dec: -72.8682959674159 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.01
Image Trigger?: NO
Rate S/N Ratio: 9.59166304662544 [ if not an image trigger ]
Image S/N Ratio: 7.01
Analysis Position: [ source = BAT ]
RA: 326.772376374209 Dec: -72.8682959674159 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 326.787015047631 Dec: -72.8909131142513 [deg; J2000]
{ 21h 47m 08.9s , -72d 53' 27.3" }
+/- 2.92318713074618 [arcmin] (estimated 90% radius based on SNR)
+/- 1.74848091475567 [arcmin] (formal 1-sigma fit error)
SNR: 6.57065894872872
Angular difference between the analysis and refined position is 1.381442 arcmin
Partial Coding Fraction: 0.3125 [ including projection effects ]
Duration
T90: 11 +/- 3.16227766016838
Measured from: 1.65600001811981
to: 12.6560000181198 [s; relative to TRIGTIME]
T50: 7 +/- 3.60555127546399
Measured from: 2.65600001811981
to: 9.65600001811981 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.65600001811981
to: 3.65600001811981 [s; relative to TRIGTIME]
Total Fluence
Measured from: 1.65600001811981
to: 14.6560000181198 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.261867 0.365360 0.235548 0.031659
0.059640 0.066344 0.059783 0.067162 [error]
Peak 0.045751 0.045230 0.061815 -0.004705
0.016544 0.019120 0.017315 0.019041 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 13.000 1.656 14.656
T90 11.000 1.656 12.656
T50 7.000 2.656 9.656
Peak 1.000 2.656 3.656
====== 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 -1.709 -0.385 0.357 - - - 4.74e-03 -1.13e-03 1.09e-03 59.610 57
CPL -0.905 -1.317 1.943 63.696 -63.696 -63.696 1.27e-02 -1.27e-02 1.20e-01 58.710 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: N/A)
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 -1.542 -0.609 0.559 - - - 1.17e-02 -4.09e-03 3.93e-03 74.510 57
CPL -0.510 -1.666 0.510 73.537 -57.446 -73.537 3.81e-02 -3.81e-02 8.04e+02 74.120 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 9.58e-08 1.55e-07 1.90e-07 4.56e-07 5.70e-07 8.97e-07 erg/cm2
90%_error_low -2.89e-08 -3.22e-08 -5.91e-08 -2.35e-07 -1.38e-07 -3.04e-07 erg/cm2
90%_error_hi 3.08e-08 3.22e-08 5.97e-08 3.54e-07 1.43e-07 4.00e-07 erg/cm2
Peak flux PL 5.01e-01 4.92e-01 3.38e-01 3.65e-01 1.48e+00 1.70e+00 ph/cm2/s
90%_error_low -2.43e-01 -1.67e-01 -1.47e-01 -2.41e-01 -4.79e-01 -5.55e-01 ph/cm2/s
90%_error_hi 2.79e-01 1.64e-01 1.43e-01 4.04e-01 4.80e-01 5.66e-01 ph/cm2/s
Fluence CPL 8.62e-08 1.70e-07 1.95e-07 1.51e-07 5.38e-07 6.02e-07 erg/cm2
90%_error_low -3.47e-08 -4.10e-08 -6.69e-08 -1.29e-07 -1.42e-07 -2.00e-07 erg/cm2
90%_error_hi 3.51e-08 4.43e-08 6.71e-08 3.97e-07 1.53e-07 4.40e-07 erg/cm2
Peak flux CPL 4.09e-01 5.37e-01 3.70e-01 1.45e-01 1.42e+00 1.46e+00 ph/cm2/s
90%_error_low N/A -1.99e-01 N/A -1.45e-01 -6.38e-01 -6.82e-01 ph/cm2/s
90%_error_hi N/A 2.17e-01 N/A 3.04e-01 5.07e-01 7.38e-01 ph/cm2/s
======================================================================
Special notes of this burst