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: Sun Mar 17 22:24:36 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger889785
======================================================================
Trigger: 00889785 Segment: 000
BAT Trigger Time: 572324397.12 [s; MET]
Trigger Stop: 572324398.144 [s; MET]
UTC: 2019-02-20T02:59:34.673220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 330.142349349267 Dec: -76.6910121240364 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.05
Image Trigger?: NO
Rate S/N Ratio: 14.560219778561 [ if not an image trigger ]
Image S/N Ratio: 9.05
Analysis Position: [ source = BAT ]
RA: 330.142349349267 Dec: -76.6910121240364 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 330.135316423617 Dec: -76.6701948837738 [deg; J2000]
{ 22h 00m 32.5s , -76d 40' 12.7" }
+/- 1.27494371989389 [arcmin] (estimated 90% radius based on SNR)
+/- 0.465767168414482 [arcmin] (formal 1-sigma fit error)
SNR: 21.4989342426043
Angular difference between the analysis and refined position is 1.252812 arcmin
Partial Coding Fraction: 0.46875 [ including projection effects ]
Duration
T90: 10 +/- 2
Measured from: -0.120000004768372
to: 9.87999999523163 [s; relative to TRIGTIME]
T50: 4 +/- 1
Measured from: 0.879999995231628
to: 4.87999999523163 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.87999999523163
to: 2.87999999523163 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.120000004768372
to: 11.8799999952316 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.583769 0.747544 0.350657 0.044812
0.040959 0.043984 0.037356 0.032845 [error]
Peak 0.088594 0.144092 0.059181 0.008910
0.011844 0.014862 0.012213 0.009664 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 12.000 -0.120 11.880
T90 10.000 -0.120 9.880
T50 4.000 0.880 4.880
Peak 1.000 1.880 2.880
====== 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 -2.031 -0.138 0.133 - - - 8.89e-03 -8.10e-04 7.99e-04 90.690 57
CPL -0.775 -0.709 0.862 40.095 -6.282 7.014 4.73e-02 -2.87e-02 1.05e-01 80.300 56
=== 1-s peak 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 -1.870 -0.226 0.212 - - - 1.80e-02 -2.92e-03 2.87e-03 79.610 57
CPL 0.501 -1.423 2.265 43.210 -6.178 10.543 4.38e-01 -4.38e-01 9.81e+00 69.490 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 2.25e-07 2.99e-07 2.93e-07 5.14e-07 9.85e-07 1.33e-06 erg/cm2
90%_error_low -2.34e-08 -2.21e-08 -3.59e-08 -1.15e-07 -8.37e-08 -1.57e-07 erg/cm2
90%_error_hi 2.39e-08 2.21e-08 3.63e-08 1.34e-07 8.48e-08 1.72e-07 erg/cm2
Peak flux PL 1.06e+00 8.57e-01 4.69e-01 3.76e-01 2.55e+00 2.76e+00 ph/cm2/s
90%_error_low -1.93e-01 -1.17e-01 -9.53e-02 -1.26e-01 -3.49e-01 -3.83e-01 ph/cm2/s
90%_error_hi 1.99e-01 1.17e-01 9.60e-02 1.55e-01 3.49e-01 3.84e-01 ph/cm2/s
Fluence CPL 2.01e-07 3.43e-07 2.71e-07 8.70e-08 8.82e-07 9.02e-07 erg/cm2
90%_error_low -2.72e-08 -3.24e-08 -4.94e-08 -5.44e-08 -9.23e-08 -1.07e-07 erg/cm2
90%_error_hi 2.74e-08 3.35e-08 4.55e-08 1.27e-07 9.79e-08 1.54e-07 erg/cm2
Peak flux CPL 8.67e-01 1.13e+00 4.45e-01 3.48e-02 2.47e+00 2.47e+00 ph/cm2/s
90%_error_low -2.33e-01 -1.95e-01 -1.56e-01 -3.48e-02 -3.52e-01 -3.54e-01 ph/cm2/s
90%_error_hi 2.33e-01 2.11e-01 1.35e-01 1.04e-01 3.53e-01 3.57e-01 ph/cm2/s
======================================================================
Special notes of this burst