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 May 31 13:31:31 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger830822
======================================================================
Trigger: 00830822 Segment: 000
BAT Trigger Time: 547155994.176 [s; MET]
Trigger Stop: 547156002.368 [s; MET]
UTC: 2018-05-04T19:46:13.285300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 331.133622917772 Dec: -14.6549190111758 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.05
Image Trigger?: NO
Rate S/N Ratio: 14.2828568570857 [ if not an image trigger ]
Image S/N Ratio: 11.05
Analysis Position: [ source = BAT ]
RA: 331.133622917772 Dec: -14.6549190111758 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 331.142793776535 Dec: -14.6665990703257 [deg; J2000]
{ 22h 04m 34.3s , -14d 39' 59.8" }
+/- 1.36795960521522 [arcmin] (estimated 90% radius based on SNR)
+/- 0.474976387765398 [arcmin] (formal 1-sigma fit error)
SNR: 19.4414203187425
Angular difference between the analysis and refined position is 0.880061 arcmin
Partial Coding Fraction: 0.6171875 [ including projection effects ]
Duration
T90: 115.263999819756 +/- 48.6950530255852
Measured from: -27.9119999408722
to: 87.3519998788834 [s; relative to TRIGTIME]
T50: 24.8319998979568 +/- 5.46741332173305
Measured from: -1.22399997711182
to: 23.607999920845 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 16.8040000200272
to: 17.8040000200272 [s; relative to TRIGTIME]
Total Fluence
Measured from: -44.2960000038147
to: 133.68799996376 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.116108 1.355610 1.038132 0.222276
0.092696 0.095986 0.085813 0.076871 [error]
Peak 0.031184 0.038259 0.030130 0.017936
0.008011 0.008147 0.007326 0.006461 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 177.984 -44.296 133.688
T90 115.264 -27.912 87.352
T50 24.832 -1.224 23.608
Peak 1.000 16.804 17.804
====== 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 -1.489 -0.142 0.141 - - - 1.39e-03 -1.08e-04 1.07e-04 61.300 57
CPL -1.489 -0.140 0.144 9999.220 -9999.220 -9999.220 1.39e-03 -1.39e-03 7.97e-04 61.310 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 -1.508 -0.443 0.435 - - - 6.67e-03 -1.65e-03 1.59e-03 57.790 57
CPL -1.520 -0.432 1.008 9999.340 -9999.340 -9999.340 6.66e-03 -1.64e-03 1.60e-02 57.790 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 3.12e-07 5.77e-07 8.22e-07 2.47e-06 2.35e-06 4.18e-06 erg/cm2
90%_error_low -4.11e-08 -4.58e-08 -8.56e-08 -5.20e-07 -2.02e-07 -5.90e-07 erg/cm2
90%_error_hi 4.26e-08 4.55e-08 8.51e-08 6.10e-07 2.05e-07 6.64e-07 erg/cm2
Peak flux PL 2.77e-01 2.77e-01 1.95e-01 2.17e-01 8.34e-01 9.66e-01 ph/cm2/s
90%_error_low -1.04e-01 -6.67e-02 -6.24e-02 -1.15e-01 -1.90e-01 -2.26e-01 ph/cm2/s
90%_error_hi 1.13e-01 6.52e-02 6.12e-02 1.79e-01 1.91e-01 2.32e-01 ph/cm2/s
Fluence CPL 3.14e-07 5.70e-07 8.17e-07 2.56e-06 2.37e-06 4.06e-06 erg/cm2
90%_error_low -4.88e-08 -4.20e-08 N/A -1.26e-06 -2.30e-07 -1.08e-06 erg/cm2
90%_error_hi 4.40e-08 6.07e-08 N/A 2.16e-07 1.79e-07 7.61e-07 erg/cm2
Peak flux CPL 2.86e-01 2.70e-01 1.92e-01 2.16e-01 8.36e-01 1.01e+00 ph/cm2/s
90%_error_low N/A -7.69e-02 -1.50e-01 N/A -1.94e-01 -3.53e-01 ph/cm2/s
90%_error_hi N/A 9.22e-02 -6.15e-02 N/A 1.90e-01 2.32e-01 ph/cm2/s
======================================================================
Special notes of this burst