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: Fri May 11 17:56:45 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger828672
======================================================================
Trigger: 00828672 Segment: 000
BAT Trigger Time: 546331602.624 [s; MET]
Trigger Stop: 546331603.648 [s; MET]
UTC: 2018-04-25T06:46:21.783300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 64.4693420741548 Dec: -32.9558700086783 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.04
Image Trigger?: NO
Rate S/N Ratio: 11.916375287813 [ if not an image trigger ]
Image S/N Ratio: 7.04
Analysis Position: [ source = BAT ]
RA: 64.4693420741548 Dec: -32.9558700086783 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 64.449873847829 Dec: -32.9496748491724 [deg; J2000]
{ 04h 17m 48.0s , -32d 56' 58.8" }
+/- 1.43149951071087 [arcmin] (estimated 90% radius based on SNR)
+/- 0.602468325782637 [arcmin] (formal 1-sigma fit error)
SNR: 18.2204675571074
Angular difference between the analysis and refined position is 1.048285 arcmin
Partial Coding Fraction: 0.2734375 [ including projection effects ]
Duration
T90: 11.9039998054504 +/- 2.71227132798173
Measured from: -0.135999917984009
to: 11.7679998874664 [s; relative to TRIGTIME]
T50: 4.54399991035461 +/- 1.2959012195006
Measured from: 1.59200000762939
to: 6.13599991798401 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.18800008296967
to: 2.18800008296967 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.967999935150146
to: 12.7280000448227 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.355831 0.641305 0.558414 0.068687
0.043940 0.047337 0.042942 0.035340 [error]
Peak 0.056093 0.061012 0.106232 0.032030
0.012799 0.013903 0.013493 0.010643 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 13.696 -0.968 12.728
T90 11.904 -0.136 11.768
T50 4.544 1.592 6.136
Peak 1.000 1.188 2.188
====== 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 -1.322 -0.134 0.135 - - - 8.76e-03 -7.04e-04 7.04e-04 51.140 57
CPL -0.902 -0.472 0.558 133.630 -50.197 -133.630 1.42e-02 -5.75e-03 1.23e-02 49.050 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 -0.862 -0.274 0.295 - - - 1.72e-02 -2.97e-03 2.90e-03 70.550 57
CPL -0.180 -0.893 1.712 167.122 -167.122 -167.122 3.23e-02 -1.74e-02 9.95e-02 69.650 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 1.30e-07 2.66e-07 4.25e-07 1.52e-06 1.18e-06 2.34e-06 erg/cm2
90%_error_low -1.84e-08 -2.37e-08 -4.15e-08 -2.96e-07 -1.03e-07 -3.29e-07 erg/cm2
90%_error_hi 1.91e-08 2.35e-08 4.12e-08 3.42e-07 1.04e-07 3.66e-07 erg/cm2
Peak flux PL 3.85e-01 5.68e-01 6.25e-01 1.29e+00 1.97e+00 2.87e+00 ph/cm2/s
90%_error_low -1.31e-01 -1.29e-01 -1.01e-01 -3.99e-01 -3.33e-01 -4.84e-01 ph/cm2/s
90%_error_hi 1.50e-01 1.27e-01 1.00e-01 5.10e-01 3.36e-01 5.08e-01 ph/cm2/s
Fluence CPL 1.21e-07 2.78e-07 4.40e-07 8.23e-07 1.15e-06 1.66e-06 erg/cm2
90%_error_low -2.12e-08 -2.80e-08 -4.55e-08 -4.01e-07 -1.13e-07 -4.11e-07 erg/cm2
90%_error_hi 2.16e-08 2.89e-08 4.65e-08 7.11e-07 1.12e-07 1.14e-06 erg/cm2
Peak flux CPL 3.08e-01 5.72e-01 6.79e-01 7.55e-01 1.92e+00 2.31e+00 ph/cm2/s
90%_error_low -1.74e-01 -1.45e-01 -6.88e-02 -4.29e-01 -3.53e-01 -6.04e-01 ph/cm2/s
90%_error_hi 9.99e-02 1.39e-01 1.44e-01 9.45e-01 3.51e-01 8.19e-01 ph/cm2/s
======================================================================
Special notes of this burst