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: Mon Dec 17 15:09:08 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger873433
======================================================================
Trigger: 00873433 Segment: 000
BAT Trigger Time: 564828901.888 [s; MET]
Trigger Stop: 564828902.912 [s; MET]
UTC: 2018-11-25T08:54:39.910800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 268.412921582668 Dec: -2.61324691311512 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.18
Image Trigger?: NO
Rate S/N Ratio: 12.2882057274445 [ if not an image trigger ]
Image S/N Ratio: 8.18
Analysis Position: [ source = BAT ]
RA: 268.412921582668 Dec: -2.61324691311512 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 268.392374393739 Dec: -2.63433922465096 [deg; J2000]
{ 17h 53m 34.2s , -02d 38' 03.6" }
+/- 2.2167643405626 [arcmin] (estimated 90% radius based on SNR)
+/- 0.934868610086708 [arcmin] (formal 1-sigma fit error)
SNR: 9.7551363025335
Angular difference between the analysis and refined position is 1.765864 arcmin
Partial Coding Fraction: 0.6953125 [ including projection effects ]
Duration
T90: 10.5119999647141 +/- 4.7872497517333
Measured from: 0.0720000267028809
to: 10.5839999914169 [s; relative to TRIGTIME]
T50: 3.19199991226196 +/- 2.03750835430094
Measured from: 0.740000009536743
to: 3.93199992179871 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.240000009536743
to: 1.24000000953674 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.180000066757202
to: 11.2400000095367 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.147171 0.203855 0.176195 0.018709
0.032491 0.032237 0.027307 0.023587 [error]
Peak 0.053621 0.077098 0.047314 0.018500
0.010325 0.010800 0.009226 0.007174 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 11.420 -0.180 11.240
T90 10.512 0.072 10.584
T50 3.192 0.740 3.932
Peak 1.000 0.240 1.240
====== 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: 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 -1.555 -0.309 0.298 - - - 3.07e-03 -5.52e-04 5.43e-04 99.510 57
CPL -0.847 -0.649 1.597 83.727 -30.090 -83.727 6.84e-03 -4.21e-03 3.01e-02 98.550 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 -1.749 -0.327 0.307 - - - 1.11e-02 -2.20e-03 2.12e-03 72.200 57
CPL -1.756 -0.322 0.316 9999.360 -9999.350 -9999.360 1.11e-02 -6.92e-03 3.76e-02 72.210 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 4.71e-08 8.37e-08 1.14e-07 3.20e-07 3.30e-07 5.65e-07 erg/cm2
90%_error_low -1.28e-08 -1.47e-08 -2.69e-08 -1.35e-07 -6.36e-08 -1.62e-07 erg/cm2
90%_error_hi 1.37e-08 1.46e-08 2.67e-08 1.87e-07 6.48e-08 2.04e-07 erg/cm2
Peak flux PL 5.81e-01 5.04e-01 3.00e-01 2.68e-01 1.50e+00 1.65e+00 ph/cm2/s
90%_error_low -1.48e-01 -8.52e-02 -7.74e-02 -1.16e-01 -2.53e-01 -2.82e-01 ph/cm2/s
90%_error_hi 1.57e-01 8.50e-02 7.72e-02 1.59e-01 2.53e-01 2.85e-01 ph/cm2/s
Fluence CPL 4.12e-08 8.92e-08 1.20e-07 1.32e-07 3.16e-07 3.83e-07 erg/cm2
90%_error_low -1.69e-08 -1.75e-08 -2.97e-08 -9.63e-08 -6.59e-08 -1.20e-07 erg/cm2
90%_error_hi 1.69e-08 1.83e-08 3.11e-08 3.07e-07 6.87e-08 2.54e-07 erg/cm2
Peak flux CPL 5.64e-01 3.86e-01 1.81e-01 1.42e-01 1.19e+00 1.25e+00 ph/cm2/s
90%_error_low -1.92e-01 -1.32e-01 -6.93e-02 N/A -4.09e-01 -4.29e-01 ph/cm2/s
90%_error_hi 2.00e-01 1.93e-01 8.45e-02 N/A 3.93e-01 4.34e-01 ph/cm2/s
======================================================================
Special notes of this burst