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: Fri Feb 10 13:44:38 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger731887
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Trigger: 00731887 Segment: 000
BAT Trigger Time: 505787626.624 [s; MET]
Trigger Stop: 505787630.72 [s; MET]
UTC: 2017-01-11T00:33:28.182060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 20.7174783857572 Dec: -32.540066578583 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.62
Image Trigger?: NO
Rate S/N Ratio: 12.5299640861417 [ if not an image trigger ]
Image S/N Ratio: 8.62
Analysis Position: [ source = BAT ]
RA: 20.7174783857572 Dec: -32.540066578583 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 20.6911536665836 Dec: -32.5433455127722 [deg; J2000]
{ 01h 22m 45.9s , -32d 32' 36.0" }
+/- 1.75424785571089 [arcmin] (estimated 90% radius based on SNR)
+/- 0.893121261308565 [arcmin] (formal 1-sigma fit error)
SNR: 13.6275259166587
Angular difference between the analysis and refined position is 1.345960 arcmin
Partial Coding Fraction: 0.4492188 [ including projection effects ]
Duration
T90: 29.8759999275208 +/- 9.71116986695626
Measured from: -12.2639999985695
to: 17.6119999289513 [s; relative to TRIGTIME]
T50: 10.4799999594688 +/- 2.51501092298271
Measured from: -5.4200000166893
to: 5.05999994277954 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.08399999141693
to: 3.08399999141693 [s; relative to TRIGTIME]
Total Fluence
Measured from: -13.5879999995232
to: 25.3240000009537 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.416881 0.495910 0.372774 0.073434
0.049630 0.052304 0.046380 0.041823 [error]
Peak 0.031408 0.043242 0.030534 0.002473
0.008087 0.009240 0.007944 0.006625 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 38.912 -13.588 25.324
T90 29.876 -12.264 17.612
T50 10.480 -5.420 5.060
Peak 1.000 2.084 3.084
====== 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 -1.627 -0.207 0.202 - - - 2.25e-03 -2.78e-04 2.74e-04 46.400 57
CPL -1.571 -0.793 0.664 357.570 -357.570 -357.570 2.41e-03 -1.64e-03 2.94e-03 46.430 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 -1.550 -0.394 0.378 - - - 6.86e-03 -1.77e-03 1.73e-03 52.570 57
CPL -0.664 -1.185 2.117 69.188 -19.083 -69.188 2.11e-02 -2.11e-02 3.11e-01 51.500 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 1.26e-07 2.14e-07 2.77e-07 7.25e-07 8.16e-07 1.34e-06 erg/cm2
90%_error_low -2.23e-08 -2.43e-08 -4.61e-08 -2.23e-07 -1.08e-07 -2.69e-07 erg/cm2
90%_error_hi 2.30e-08 2.42e-08 4.62e-08 2.83e-07 1.10e-07 3.18e-07 erg/cm2
Peak flux PL 2.96e-01 2.89e-01 1.98e-01 2.12e-01 8.68e-01 9.95e-01 ph/cm2/s
90%_error_low -1.04e-01 -7.19e-02 -6.24e-02 -1.06e-01 -2.10e-01 -2.45e-01 ph/cm2/s
90%_error_hi 1.12e-01 7.13e-02 6.20e-02 1.52e-01 2.10e-01 2.48e-01 ph/cm2/s
Fluence CPL 1.26e-07 2.14e-07 2.77e-07 7.48e-07 8.18e-07 1.36e-06 erg/cm2
90%_error_low -2.25e-08 -2.35e-08 -4.63e-08 -5.22e-07 -1.22e-07 -5.37e-07 erg/cm2
90%_error_hi 1.94e-08 2.70e-08 4.76e-08 1.33e-07 8.67e-08 1.53e-07 erg/cm2
Peak flux CPL 2.68e-01 3.24e-01 2.08e-01 7.90e-02 8.55e-01 8.80e-01 ph/cm2/s
90%_error_low -1.17e-01 -9.12e-02 -7.71e-02 -7.90e-02 -2.11e-01 -2.28e-01 ph/cm2/s
90%_error_hi 1.22e-01 1.01e-01 7.35e-02 1.87e-01 2.11e-01 2.94e-01 ph/cm2/s
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