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 17:11:02 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger868427
======================================================================
Trigger: 00868427 Segment: 000
BAT Trigger Time: 561953064 [s; MET]
Trigger Stop: 561953160 [s; MET]
UTC: 2018-10-23T02:04:02.201780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 248.328741900568 Dec: 19.564150818638 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.13
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.13
Analysis Position: [ source = BAT ]
RA: 248.328741900568 Dec: 19.564150818638 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 248.324883995465 Dec: 19.5781622938717 [deg; J2000]
{ 16h 33m 18.0s , +19d 34' 41.4" }
+/- 1.99455718922227 [arcmin] (estimated 90% radius based on SNR)
+/- 1.03550434088403 [arcmin] (formal 1-sigma fit error)
SNR: 11.3440007578389
Angular difference between the analysis and refined position is 0.868519 arcmin
Partial Coding Fraction: 0.515625 [ including projection effects ]
Duration
T90: 56.9839998483658 +/- 8.03310270984739
Measured from: -21.4119999408722
to: 35.5719999074936 [s; relative to TRIGTIME]
T50: 35.5999999046326 +/- 8.24235794592534
Measured from: -7.55599999427795
to: 28.0439999103546 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 32.1840000152588
to: 33.1840000152588 [s; relative to TRIGTIME]
Total Fluence
Measured from: -29.0160000324249
to: 36.9400000572205 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.667064 0.775392 0.588418 0.112958
0.105407 0.090893 0.076592 0.068049 [error]
Peak 0.043308 0.031396 0.029800 0.011832
0.012742 0.011109 0.009485 0.008271 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 65.956 -29.016 36.940
T90 56.984 -21.412 35.572
T50 35.600 -7.556 28.044
Peak 1.000 32.184 33.184
====== 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 -1.722 -0.241 0.236 - - - 2.14e-03 -2.90e-04 2.87e-04 71.770 57
CPL -1.551 -0.834 0.981 129.856 -129.856 -129.856 2.62e-03 -7.57e-04 5.33e-03 71.650 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 -1.949 -0.681 0.606 - - - 6.74e-03 -2.55e-03 2.34e-03 50.380 57
CPL -1.941 -1.673 1.885 350.793 N/A N/A 6.82e-03 N/A N/A 50.380 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 2.22e-07 3.56e-07 4.32e-07 1.03e-06 1.30e-06 2.04e-06 erg/cm2
90%_error_low -4.80e-08 -4.81e-08 -7.75e-08 -3.45e-07 -1.82e-07 -4.17e-07 erg/cm2
90%_error_hi 5.10e-08 4.77e-08 7.71e-08 4.49e-07 1.84e-07 4.95e-07 erg/cm2
Peak flux PL 4.28e-01 3.31e-01 1.71e-01 1.28e-01 9.89e-01 1.06e+00 ph/cm2/s
90%_error_low -2.00e-01 -1.02e-01 -8.17e-02 -8.95e-02 -3.10e-01 -3.22e-01 ph/cm2/s
90%_error_hi 2.26e-01 1.01e-01 8.17e-02 1.68e-01 3.12e-01 3.22e-01 ph/cm2/s
Fluence CPL 2.16e-07 3.62e-07 4.36e-07 7.88e-07 1.29e-06 1.80e-06 erg/cm2
90%_error_low -5.77e-08 -5.34e-08 -8.01e-08 -5.51e-07 -2.01e-07 -6.01e-07 erg/cm2
90%_error_hi 5.12e-08 5.75e-08 8.28e-08 3.29e-07 1.96e-07 3.93e-07 erg/cm2
Peak flux CPL 4.37e-01 3.21e-01 1.61e-01 1.35e-01 9.69e-01 1.04e+00 ph/cm2/s
90%_error_low N/A -1.78e-01 -7.11e-02 -7.76e-02 N/A -5.74e-01 ph/cm2/s
90%_error_hi N/A 1.10e-01 6.30e-02 4.52e-02 N/A 3.57e-01 ph/cm2/s
======================================================================
Special notes of this burst