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 Mar 17 18:32:26 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger674670
======================================================================
Trigger: 00674670 Segment: 000
BAT Trigger Time: 477624341.568 [s; MET]
Trigger Stop: 477624345.664 [s; MET]
UTC: 2016-02-20T01:25:25.700460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 236.924873803515 Dec: -18.5551027454631 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.35
Image Trigger?: NO
Rate S/N Ratio: 11.3137084989848 [ if not an image trigger ]
Image S/N Ratio: 7.35
Analysis Position: [ source = BAT ]
RA: 236.924873803515 Dec: -18.5551027454631 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 236.940476258743 Dec: -18.5423690981603 [deg; J2000]
{ 15h 47m 45.7s , -18d 32' 32.5" }
+/- 1.7544430005951 [arcmin] (estimated 90% radius based on SNR)
+/- 0.676359342119624 [arcmin] (formal 1-sigma fit error)
SNR: 13.6253605744959
Angular difference between the analysis and refined position is 1.171073 arcmin
Partial Coding Fraction: 0.2773438 [ including projection effects ]
Duration
T90: 8.25999993085861 +/- 1.16642363616434
Measured from: 0.476000010967255
to: 8.73599994182587 [s; relative to TRIGTIME]
T50: 4.5 +/- 1.21395219645737
Measured from: 2.0359999537468
to: 6.5359999537468 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.328000009059906
to: 1.32800000905991 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.100000023841858
to: 8.9879999756813 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.251822 0.319876 0.226948 0.055952
0.041263 0.037924 0.031151 0.025058 [error]
Peak 0.050768 0.050208 0.024173 0.022589
0.013713 0.012786 0.010337 0.009179 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 9.088 -0.100 8.988
T90 8.260 0.476 8.736
T50 4.500 2.036 6.536
Peak 1.000 0.328 1.328
====== 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 -1.514 -0.245 0.246 - - - 5.96e-03 -7.94e-04 7.90e-04 39.060 57
CPL -1.509 -0.248 0.428 9999.310 -9999.310 -9999.310 5.98e-03 -5.02e-03 6.74e-03 39.070 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 -1.546 -0.567 0.608 - - - 7.95e-03 -2.38e-03 2.33e-03 67.400 57
CPL -1.558 -1.371 1.332 9999.360 N/A N/A 7.91e-03 N/A N/A 67.400 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 7.01e-08 1.28e-07 1.79e-07 5.25e-07 5.13e-07 9.01e-07 erg/cm2
90%_error_low -1.65e-08 -1.84e-08 -3.09e-08 -1.75e-07 -7.36e-08 -2.01e-07 erg/cm2
90%_error_hi 1.76e-08 1.81e-08 3.05e-08 2.30e-07 7.43e-08 2.44e-07 erg/cm2
Peak flux PL 3.42e-01 3.35e-01 2.29e-01 2.47e-01 1.00e+00 1.15e+00 ph/cm2/s
90%_error_low -1.76e-01 -1.14e-01 -8.64e-02 -1.50e-01 -3.07e-01 -3.34e-01 ph/cm2/s
90%_error_hi 2.01e-01 1.07e-01 8.48e-02 2.76e-01 3.10e-01 3.35e-01 ph/cm2/s
Fluence CPL 7.01e-08 1.28e-07 1.79e-07 5.22e-07 5.20e-07 9.14e-07 erg/cm2
90%_error_low N/A N/A N/A N/A -8.14e-08 -3.63e-07 erg/cm2
90%_error_hi N/A N/A N/A N/A 6.66e-08 9.60e-08 erg/cm2
Peak flux CPL 3.54e-01 3.29e-01 2.27e-01 2.52e-01 1.01e+00 1.15e+00 ph/cm2/s
90%_error_low -1.90e-01 -1.08e-01 N/A N/A -3.08e-01 -3.30e-01 ph/cm2/s
90%_error_hi 1.89e-01 1.17e-01 N/A N/A 3.07e-01 3.37e-01 ph/cm2/s
======================================================================
Special notes of this burst