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 v2.47
Process Start Time: Wed Jul 22 21:56:44 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger980421
======================================================================
Trigger: 00980421 Segment: 000
BAT Trigger Time: 615300444.288 [s; MET]
Trigger Stop: 615300446.336 [s; MET]
UTC: 2020-07-01T12:46:59.079040 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 123.554730695954 Dec: -14.4938413543113 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.22
Image Trigger?: NO
Rate S/N Ratio: 9 [ if not an image trigger ]
Image S/N Ratio: 7.22
Analysis Position: [ source = BAT ]
RA: 123.554730695954 Dec: -14.4938413543113 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 123.566684878342 Dec: -14.5336398394491 [deg; J2000]
{ 08h 14m 16.0s , -14d 32' 01.1" }
+/- 1.5225831988995 [arcmin] (estimated 90% radius based on SNR)
+/- 0.703721835831624 [arcmin] (formal 1-sigma fit error)
SNR: 16.6835448249642
Angular difference between the analysis and refined position is 2.486815 arcmin
Partial Coding Fraction: 0.7734375 [ including projection effects ]
Duration
T90: 38.7799999713898 +/- 8.71284933029988
Measured from: -5.12000000476837
to: 33.6599999666214 [s; relative to TRIGTIME]
T50: 14.2719999551773 +/- 4.4944823660938
Measured from: 0.00800001621246338
to: 14.2799999713898 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -1.72000002861023
to: -0.720000028610229 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.80799996852875
to: 42.1679999828339 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.635745 0.723826 0.320723 0.084487
0.052164 0.053219 0.045229 0.039122 [error]
Peak 0.029909 0.038926 0.017303 0.018803
0.007807 0.007707 0.006855 0.005735 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 48.976 -6.808 42.168
T90 38.780 -5.120 33.660
T50 14.272 0.008 14.280
Peak 1.000 -1.720 -0.720
====== 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 -1.938 -0.168 0.162 - - - 2.06e-03 -2.28e-04 2.24e-04 67.110 57
CPL -1.519 -0.644 0.834 45.743 N/A N/A 3.66e-03 N/A N/A 65.960 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 -1.652 -0.443 0.435 - - - 5.65e-03 -1.56e-03 1.50e-03 57.290 57
CPL -1.651 N/A N/A 9999.250 N/A N/A 5.66e-03 N/A N/A 57.300 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 1.94e-07 2.74e-07 2.86e-07 5.48e-07 9.26e-07 1.30e-06 erg/cm2
90%_error_low -2.42e-08 -2.42e-08 -4.28e-08 -1.47e-07 -9.85e-08 -1.98e-07 erg/cm2
90%_error_hi 2.47e-08 2.42e-08 4.36e-08 1.81e-07 1.01e-07 2.24e-07 erg/cm2
Peak flux PL 2.69e-01 2.47e-01 1.58e-01 1.54e-01 7.38e-01 8.28e-01 ph/cm2/s
90%_error_low -9.79e-02 -6.06e-02 -5.47e-02 -8.40e-02 -1.79e-01 -2.05e-01 ph/cm2/s
90%_error_hi 1.03e-01 6.03e-02 5.56e-02 1.35e-01 1.79e-01 2.09e-01 ph/cm2/s
Fluence CPL 1.89e-07 2.88e-07 2.76e-07 2.41e-07 8.77e-07 9.95e-07 erg/cm2
90%_error_low -2.60e-08 -3.25e-08 -5.57e-08 -1.76e-07 -1.24e-07 -2.23e-07 erg/cm2
90%_error_hi 2.60e-08 3.51e-08 4.86e-08 3.94e-07 1.26e-07 4.57e-07 erg/cm2
Peak flux CPL 2.73e-01 2.45e-01 1.57e-01 1.55e-01 7.38e-01 8.19e-01 ph/cm2/s
90%_error_low -1.02e-01 -5.74e-02 -5.41e-02 -9.76e-02 -1.78e-01 -3.38e-01 ph/cm2/s
90%_error_hi 9.95e-02 7.26e-02 5.63e-02 6.26e-02 1.79e-01 2.14e-01 ph/cm2/s
======================================================================
Special notes of this burst