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: Mon Jun 29 15:05:11 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger970886
======================================================================
Trigger: 00970886 Segment: 000
BAT Trigger Time: 610699662.336 [s; MET]
Trigger Stop: 610699666.432 [s; MET]
UTC: 2020-05-09T06:47:17.426340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 116.449929380473 Dec: -4.64135929017309 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.2
Image Trigger?: NO
Rate S/N Ratio: 13.1529464379659 [ if not an image trigger ]
Image S/N Ratio: 10.2
Analysis Position: [ source = BAT ]
RA: 116.449929380473 Dec: -4.64135929017309 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 116.414946348068 Dec: -4.63401519229606 [deg; J2000]
{ 07h 45m 39.6s , -04d 38' 02.5" }
+/- 1.70519975245069 [arcmin] (estimated 90% radius based on SNR)
+/- 0.802992935622336 [arcmin] (formal 1-sigma fit error)
SNR: 14.1909302149057
Angular difference between the analysis and refined position is 2.138011 arcmin
Partial Coding Fraction: 0.3984375 [ including projection effects ]
Duration
T90: 828.227999925613 +/- 13.3825565010765
Measured from: 3.36400008201599
to: 831.592000007629 [s; relative to TRIGTIME]
T50: 607.999999880791 +/- 209.406043122585
Measured from: 206.236000061035
to: 814.235999941826 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 822.692000031471
to: 823.692000031471 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.796000003814697
to: 848.991999983788 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.081621 4.197761 3.242221 0.845820
0.180387 0.187450 0.166827 0.152894 [error]
Peak 0.064290 0.049961 0.039725 0.013032
0.006603 0.006943 0.006016 0.005086 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 849.788 -0.796 848.992
T90 828.228 3.364 831.592
T50 608.000 206.236 814.236
Peak 1.000 822.692 823.692
====== 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 -1.512 -0.092 0.091 - - - 8.54e-04 -4.41e-05 4.40e-05 42.000 57
CPL -1.186 -0.351 0.382 124.898 -42.720 -124.898 1.24e-03 -4.02e-04 6.72e-04 39.510 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 -1.826 -0.260 0.243 - - - 9.08e-03 -1.44e-03 1.39e-03 47.320 57
CPL -2.059 -0.181 0.685 24.828 N/A N/A 6.83e-03 N/A N/A 46.820 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 9.37e-07 1.71e-06 2.40e-06 7.04e-06 6.87e-06 1.21e-05 erg/cm2
90%_error_low -8.26e-08 -9.14e-08 -1.62e-07 -9.84e-07 -3.88e-07 -1.11e-06 erg/cm2
90%_error_hi 8.48e-08 9.12e-08 1.62e-07 1.09e-06 3.91e-07 1.20e-06 erg/cm2
Peak flux PL 5.11e-01 4.25e-01 2.40e-01 2.00e-01 1.26e+00 1.38e+00 ph/cm2/s
90%_error_low -9.78e-02 -5.35e-02 -5.05e-02 -7.25e-02 -1.59e-01 -1.77e-01 ph/cm2/s
90%_error_hi 1.02e-01 5.35e-02 5.04e-02 9.36e-02 1.59e-01 1.79e-01 ph/cm2/s
Fluence CPL 8.85e-07 1.76e-06 2.44e-06 4.30e-06 6.68e-06 9.38e-06 erg/cm2
90%_error_low -9.92e-08 -1.08e-07 -1.72e-07 -1.68e-06 -4.42e-07 -1.73e-06 erg/cm2
90%_error_hi 1.01e-07 1.10e-07 1.74e-07 3.02e-06 4.41e-07 3.04e-06 erg/cm2
Peak flux CPL 5.16e-01 4.23e-01 2.38e-01 2.01e-01 1.26e+00 1.38e+00 ph/cm2/s
90%_error_low -1.03e-01 N/A N/A -7.14e-02 -1.59e-01 -2.00e-01 ph/cm2/s
90%_error_hi 1.05e-01 N/A N/A 9.14e-02 1.59e-01 1.74e-01 ph/cm2/s
======================================================================
Special notes of this burst