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 Mar 21 15:12:11 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger887579
======================================================================
Trigger: 00887579 Segment: 000
BAT Trigger Time: 570951983.104 [s; MET]
Trigger Stop: 570951984.128 [s; MET]
UTC: 2019-02-04T05:46:00.743560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 351.53388272963 Dec: 54.8827857064406 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13.71
Image Trigger?: NO
Rate S/N Ratio: 34.0440890610984 [ if not an image trigger ]
Image S/N Ratio: 13.71
Analysis Position: [ source = BAT ]
RA: 351.53388272963 Dec: 54.8827857064406 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 351.490917880434 Dec: 54.8840662348078 [deg; J2000]
{ 23h 25m 57.8s , +54d 53' 02.6" }
+/- 0.63918515280368 [arcmin] (estimated 90% radius based on SNR)
+/- 0.284190923996894 [arcmin] (formal 1-sigma fit error)
SNR: 57.6493683991354
Angular difference between the analysis and refined position is 1.484900 arcmin
Partial Coding Fraction: 0.484375 [ including projection effects ]
Duration
T90: 26.3239998817444 +/- 7.5497881100902
Measured from: -2.58799982070923
to: 23.7360000610352 [s; relative to TRIGTIME]
T50: 3.90399992465973 +/- 0.202267160392584
Measured from: 4.10800015926361
to: 8.01200008392334 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.86400008201599
to: 5.86400008201599 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.51999998092651
to: 54.1280000209808 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.090194 6.313829 5.733352 1.794411
0.087098 0.097479 0.091729 0.074978 [error]
Peak 0.678107 1.250780 1.302533 0.464995
0.023955 0.031526 0.032949 0.023916 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 60.648 -6.520 54.128
T90 26.324 -2.588 23.736
T50 3.904 4.108 8.012
Peak 1.000 4.864 5.864
====== 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 -1.287 -0.038 0.038 - - - 2.07e-02 -4.19e-04 4.19e-04 48.720 57
CPL -1.166 -0.123 0.155 414.106 -197.924 -414.106 2.33e-02 -2.72e-03 3.68e-03 46.870 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: CPL)
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 -1.103 -0.050 0.050 - - - 2.59e-01 -7.42e-03 7.42e-03 63.370 57
CPL -0.758 -0.201 0.211 210.390 -57.869 199.938 3.67e-01 -6.59e-02 8.42e-02 54.580 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 1.31e-06 2.75e-06 4.51e-06 1.67e-05 1.25e-05 2.53e-05 erg/cm2
90%_error_low -5.76e-08 -7.04e-08 -1.01e-07 -8.82e-07 -2.57e-07 -9.19e-07 erg/cm2
90%_error_hi 5.88e-08 7.03e-08 1.01e-07 9.16e-07 2.57e-07 9.47e-07 erg/cm2
Peak flux PL 2.01e-03 3.05e-02 2.62e-01 3.05e+01 1.16e+00 2.99e+01 ph/cm2/s
90%_error_low N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_hi N/A N/A N/A N/A N/A N/A ph/cm2/s
Fluence CPL 1.27e-06 2.76e-06 4.57e-06 1.44e-05 1.24e-05 2.30e-05 erg/cm2
90%_error_low -7.89e-08 -7.21e-08 -1.22e-07 -2.39e-06 -2.74e-07 -2.38e-06 erg/cm2
90%_error_hi 6.90e-08 7.23e-08 1.23e-07 2.50e-06 2.73e-07 2.53e-06 erg/cm2
Peak flux CPL 6.64e+00 9.45e+00 9.04e+00 1.03e+01 2.96e+01 3.54e+01 ph/cm2/s
90%_error_low -5.46e-01 -3.49e-01 -3.46e-01 -1.71e+00 -9.26e-01 -1.98e+00 ph/cm2/s
90%_error_hi 5.59e-01 3.50e-01 3.49e-01 2.13e+00 9.27e-01 2.32e+00 ph/cm2/s
======================================================================
Special notes of this burst