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: Sun Aug 30 18:08:19 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger651882
======================================================================
Trigger: 00651882 Segment: 000
BAT Trigger Time: 460958784 [s; MET]
Trigger Stop: 460958848 [s; MET]
UTC: 2015-08-11T04:06:09.022920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 291.370844486993 Dec: -15.4381283909325 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.67
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.67
Analysis Position: [ source = BAT ]
RA: 291.370844486993 Dec: -15.4381283909325 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 291.345175381785 Dec: -15.4375489483609 [deg; J2000]
{ 19h 25m 22.8s , -15d 26' 15.2" }
+/- 1.94642539453502 [arcmin] (estimated 90% radius based on SNR)
+/- 0.955325865879976 [arcmin] (formal 1-sigma fit error)
SNR: 11.746854162161
Angular difference between the analysis and refined position is 1.484985 arcmin
Partial Coding Fraction: 0.6796875 [ including projection effects ]
Duration
T90: 31.5199999213219 +/- 7.31887482514508
Measured from: 4.63200002908707
to: 36.1519999504089 [s; relative to TRIGTIME]
T50: 16.3719999790192 +/- 4.58665973285042
Measured from: 6.81599998474121
to: 23.1879999637604 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.00800001621246
to: 6.00800001621246 [s; relative to TRIGTIME]
Total Fluence
Measured from: 1.50800001621246
to: 39.1840000152588 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.399911 0.350962 0.177710 0.047599
0.043803 0.042855 0.035459 0.029779 [error]
Peak 0.035260 0.023839 0.004236 0.007794
0.007388 0.007240 0.005969 0.004816 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 37.676 1.508 39.184
T90 31.520 4.632 36.152
T50 16.372 6.816 23.188
Peak 1.000 5.008 6.008
====== 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 -2.133 -0.276 0.254 - - - 1.37e-03 -2.52e-04 2.44e-04 64.320 57
CPL -1.943 -0.059 1.004 12.492 -11.507 -12.492 1.77e-03 -7.44e-04 2.84e-04 64.280 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 -2.264 -0.657 0.542 - - - 3.53e-03 -1.55e-03 1.51e-03 69.780 57
CPL -1.080 -1.036 4.250 26.277 N/A N/A 2.12e-02 N/A N/A 69.430 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 1.20e-07 1.50e-07 1.37e-07 2.18e-07 4.82e-07 6.26e-07 erg/cm2
90%_error_low -2.15e-08 -2.04e-08 -3.36e-08 -8.95e-08 -7.68e-08 -1.34e-07 erg/cm2
90%_error_hi 2.20e-08 2.02e-08 3.49e-08 1.24e-07 7.90e-08 1.60e-07 erg/cm2
Peak flux PL 3.04e-01 1.96e-01 8.15e-02 4.62e-02 6.05e-01 6.28e-01 ph/cm2/s
90%_error_low -1.10e-01 -6.12e-02 -4.28e-02 -4.62e-02 -1.75e-01 -1.84e-01 ph/cm2/s
90%_error_hi 1.14e-01 5.94e-02 4.87e-02 6.61e-02 1.75e-01 1.86e-01 ph/cm2/s
Fluence CPL 1.20e-07 1.52e-07 1.36e-07 1.62e-07 4.75e-07 5.47e-07 erg/cm2
90%_error_low -1.35e-08 -5.19e-08 -3.72e-08 -1.05e-07 -8.71e-08 N/A erg/cm2
90%_error_hi 1.84e-08 1.95e-08 3.46e-08 2.24e-07 8.63e-08 N/A erg/cm2
Peak flux CPL 3.04e-01 2.02e-01 7.59e-02 2.11e-02 6.00e-01 6.09e-01 ph/cm2/s
90%_error_low -5.57e-02 -5.98e-02 -3.92e-02 N/A N/A N/A ph/cm2/s
90%_error_hi 1.08e-01 5.99e-02 5.31e-02 N/A N/A N/A ph/cm2/s
======================================================================
Special notes of this burst