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: Thu Apr 5 17:40:40 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger811561
======================================================================
Trigger: 00811561 Segment: 000
BAT Trigger Time: 541203688.256 [s; MET]
Trigger Stop: 541203689.28 [s; MET]
UTC: 2018-02-24T22:21:07.725300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 202.661007449936 Dec: 38.088104423003 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.08
Image Trigger?: NO
Rate S/N Ratio: 16.3095064303001 [ if not an image trigger ]
Image S/N Ratio: 10.08
Analysis Position: [ source = BAT ]
RA: 202.661007449936 Dec: 38.088104423003 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 202.672214834606 Dec: 38.0750423735811 [deg; J2000]
{ 13h 30m 41.3s , +38d 04' 30.2" }
+/- 1.30189387289411 [arcmin] (estimated 90% radius based on SNR)
+/- 0.450587711528834 [arcmin] (formal 1-sigma fit error)
SNR: 20.8659890712778
Angular difference between the analysis and refined position is 0.945718 arcmin
Partial Coding Fraction: 0.9375 [ including projection effects ]
Duration
T90: 10.9199999570847 +/- 3.56827627531245
Measured from: 0.143999934196472
to: 11.0639998912811 [s; relative to TRIGTIME]
T50: 4.58399999141693 +/- 0.765704856535722
Measured from: 1.3639999628067
to: 5.94799995422363 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.395999908447266
to: 1.39599990844727 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.472000002861023
to: 14.5719999074936 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.363007 0.390978 0.145252 0.056190
0.025555 0.026777 0.023874 0.023386 [error]
Peak 0.064971 0.067311 0.036441 0.010801
0.007326 0.007608 0.006628 0.006062 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 15.044 -0.472 14.572
T90 10.920 0.144 11.064
T50 4.584 1.364 5.948
Peak 1.000 0.396 1.396
====== 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 -2.105 -0.180 0.171 - - - 3.34e-03 -3.98e-04 3.91e-04 37.510 57
CPL -1.490 -0.624 0.960 32.334 -28.127 17.538 7.81e-03 -4.87e-03 2.21e-02 35.630 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 -1.899 -0.241 0.227 - - - 1.00e-02 -1.60e-03 1.56e-03 48.720 57
CPL -1.378 -0.800 1.159 48.757 N/A N/A 2.02e-02 N/A N/A 47.810 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 1.14e-07 1.45e-07 1.35e-07 2.20e-07 4.67e-07 6.13e-07 erg/cm2
90%_error_low -1.34e-08 -1.27e-08 -2.18e-08 -6.31e-08 -4.91e-08 -9.00e-08 erg/cm2
90%_error_hi 1.37e-08 1.26e-08 2.25e-08 7.89e-08 5.04e-08 1.02e-07 erg/cm2
Peak flux PL 6.04e-01 4.81e-01 2.58e-01 2.02e-01 1.43e+00 1.54e+00 ph/cm2/s
90%_error_low -1.06e-01 -6.00e-02 -5.35e-02 -7.03e-02 -1.78e-01 -1.97e-01 ph/cm2/s
90%_error_hi 1.09e-01 5.99e-02 5.46e-02 9.09e-02 1.78e-01 1.98e-01 ph/cm2/s
Fluence CPL 1.09e-07 1.55e-07 1.26e-07 7.09e-08 4.33e-07 4.60e-07 erg/cm2
90%_error_low -1.51e-08 -2.43e-08 -2.94e-08 -5.27e-08 -5.95e-08 -8.26e-08 erg/cm2
90%_error_hi 1.50e-08 1.82e-08 2.65e-08 2.14e-07 6.50e-08 1.17e-07 erg/cm2
Peak flux CPL 5.79e-01 5.12e-01 2.53e-01 9.44e-02 1.41e+00 1.44e+00 ph/cm2/s
90%_error_low -1.18e-01 -1.08e-01 -6.37e-02 -9.44e-02 -1.84e-01 -2.05e-01 ph/cm2/s
90%_error_hi 1.18e-01 8.48e-02 5.91e-02 1.32e-01 1.84e-01 2.52e-01 ph/cm2/s
======================================================================
Special notes of this burst