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 Aug 6 18:17:04 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger849018
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Trigger: 00849018 Segment: 000
BAT Trigger Time: 553864029.696 [s; MET]
Trigger Stop: 553864030.72 [s; MET]
UTC: 2018-07-21T11:06:48.396880 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 347.694926138303 Dec: 4.87966224106747 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.61
Image Trigger?: NO
Rate S/N Ratio: 14.2828568570857 [ if not an image trigger ]
Image S/N Ratio: 7.61
Analysis Position: [ source = BAT ]
RA: 347.694926138303 Dec: 4.87966224106747 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 347.707005927865 Dec: 4.87392841792597 [deg; J2000]
{ 23h 10m 49.7s , +04d 52' 26.1" }
+/- 1.8277119833615 [arcmin] (estimated 90% radius based on SNR)
+/- 0.853226348159027 [arcmin] (formal 1-sigma fit error)
SNR: 12.8518141957971
Angular difference between the analysis and refined position is 0.799923 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 47.6000000238419 +/- 2.98665041218178
Measured from: 0.0839999914169312
to: 47.6840000152588 [s; relative to TRIGTIME]
T50: 14.6279999017715 +/- 26.9649005406666
Measured from: 2.69200003147125
to: 17.3199999332428 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.81599998474121
to: 2.81599998474121 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.391999959945679
to: 48.9160000085831 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.188118 0.349896 0.278230 0.086891
0.040422 0.042203 0.036731 0.031634 [error]
Peak 0.023878 0.045055 0.032743 0.013376
0.005990 0.006504 0.005760 0.004635 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 49.308 -0.392 48.916
T90 47.600 0.084 47.684
T50 14.628 2.692 17.320
Peak 1.000 1.816 2.816
====== 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 -1.256 -0.221 0.225 - - - 1.21e-03 -1.56e-04 1.56e-04 52.530 57
CPL -0.757 -0.670 1.093 127.875 -57.276 -127.875 2.13e-03 -1.05e-03 5.02e-03 51.610 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 -1.207 -0.263 0.269 - - - 7.50e-03 -1.18e-03 1.18e-03 58.150 57
CPL -0.636 -0.911 1.463 120.411 -56.656 -120.411 1.46e-02 -8.03e-03 6.51e-02 57.330 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 6.04e-08 1.29e-07 2.16e-07 8.25e-07 5.94e-07 1.23e-06 erg/cm2
90%_error_low -1.37e-08 -1.85e-08 -3.45e-08 -2.54e-07 -8.60e-08 -2.82e-07 erg/cm2
90%_error_hi 1.46e-08 1.82e-08 3.42e-08 3.25e-07 8.70e-08 3.43e-07 erg/cm2
Peak flux PL 2.33e-01 2.79e-01 2.42e-01 3.58e-01 8.81e-01 1.11e+00 ph/cm2/s
90%_error_low -6.41e-02 -5.01e-02 -4.53e-02 -1.21e-01 -1.40e-01 -1.86e-01 ph/cm2/s
90%_error_hi 6.91e-02 4.92e-02 4.47e-02 1.56e-01 1.41e-01 1.92e-01 ph/cm2/s
Fluence CPL 5.53e-08 1.36e-07 2.24e-07 4.03e-07 5.71e-07 8.17e-07 erg/cm2
90%_error_low -1.65e-08 -2.19e-08 -3.78e-08 -2.74e-07 -9.67e-08 -2.90e-07 erg/cm2
90%_error_hi 1.70e-08 2.31e-08 3.89e-08 6.57e-07 9.58e-08 5.28e-07 erg/cm2
Peak flux CPL 2.11e-01 2.96e-01 2.54e-01 1.88e-01 8.63e-01 9.49e-01 ph/cm2/s
90%_error_low -7.58e-02 -5.88e-02 -5.08e-02 -1.88e-01 -1.46e-01 -2.06e-01 ph/cm2/s
90%_error_hi 7.91e-02 6.38e-02 5.27e-02 2.17e-01 1.45e-01 2.74e-01 ph/cm2/s
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