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: Mon Aug 6 18:24:51 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger848890
======================================================================
Trigger: 00848890 Segment: 000
BAT Trigger Time: 553789325.888 [s; MET]
Trigger Stop: 553789326.912 [s; MET]
UTC: 2018-07-20T14:21:44.593440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 0.52968200447337 Dec: -2.93344156841311 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.41
Image Trigger?: NO
Rate S/N Ratio: 135.970585054268 [ if not an image trigger ]
Image S/N Ratio: 12.41
Analysis Position: [ source = BAT ]
RA: 0.52968200447337 Dec: -2.93344156841311 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 0.528571841222877 Dec: -2.92552612118528 [deg; J2000]
{ 00h 02m 06.9s , -02d 55' 31.9" }
+/- 1.16091989332408 [arcmin] (estimated 90% radius based on SNR)
+/- 0.41793099795083 [arcmin] (formal 1-sigma fit error)
SNR: 24.5778411209893
Angular difference between the analysis and refined position is 0.479563 arcmin
Partial Coding Fraction: 0.08496094 [ including projection effects ]
Duration
T90: 108.399999856949 +/- 3.6884533781446
Measured from: 0.220000028610229
to: 108.619999885559 [s; relative to TRIGTIME]
T50: 20.067999958992 +/- 1.06384957132124
Measured from: 8.28799998760223
to: 28.3559999465942 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 10.9359999895096
to: 11.9359999895096 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.81599998474121
to: 527.728000044823 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 27.985309 42.002355 38.493172 13.089993
0.287209 0.348442 0.353681 0.280679 [error]
Peak 1.265924 2.649425 3.050419 1.236563
0.064338 0.090272 0.105104 0.086043 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 531.544 -3.816 527.728
T90 108.400 0.220 108.620
T50 20.068 8.288 28.356
Peak 1.000 10.936 11.936
====== 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 -1.345 -0.027 0.027 - - - 1.62e-02 -2.42e-04 2.42e-04 34.850 57
CPL -1.340 -0.028 0.054 9998.780 -9998.780 -9998.780 1.63e-02 -2.26e-04 8.28e-04 35.020 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 -1.026 -0.063 0.063 - - - 5.89e-01 -2.20e-02 2.20e-02 74.420 57
CPL -0.664 -0.251 0.266 214.739 -66.739 321.716 8.53e-01 -1.89e-01 2.58e-01 68.220 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 9.53e-06 1.93e-05 3.03e-05 1.06e-04 8.44e-05 1.65e-04 erg/cm2
90%_error_low -3.19e-07 -3.79e-07 -4.53e-07 -3.78e-06 -1.19e-06 -3.85e-06 erg/cm2
90%_error_hi 3.24e-07 3.79e-07 4.53e-07 3.87e-06 1.19e-06 3.93e-06 erg/cm2
Peak flux PL 1.44e-03 4.78e-02 5.32e-01 5.18e+01 2.39e+00 5.18e+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 9.52e-06 1.93e-05 3.03e-05 1.05e-04 8.44e-05 1.72e-04 erg/cm2
90%_error_low N/A -3.80e-07 N/A N/A -1.19e-06 N/A erg/cm2
90%_error_hi N/A 3.79e-07 N/A N/A 1.18e-06 N/A erg/cm2
Peak flux CPL 1.40e+01 2.10e+01 2.12e+01 2.53e+01 6.72e+01 8.16e+01 ph/cm2/s
90%_error_low -1.43e+00 -1.01e+00 -1.07e+00 -5.20e+00 -2.63e+00 -5.81e+00 ph/cm2/s
90%_error_hi 1.46e+00 1.02e+00 1.08e+00 6.87e+00 2.63e+00 7.16e+00 ph/cm2/s
======================================================================
Special notes of this burst