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 Mar 21 18:04:05 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger878911
======================================================================
Trigger: 00878911 Segment: 000
BAT Trigger Time: 567351433.728 [s; MET]
Trigger Stop: 567351434.752 [s; MET]
UTC: 2018-12-24T13:36:51.593320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 125.931158144386 Dec: 6.20566865282203 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.72
Image Trigger?: NO
Rate S/N Ratio: 10.1488915650922 [ if not an image trigger ]
Image S/N Ratio: 8.72
Analysis Position: [ source = BAT ]
RA: 125.931158144386 Dec: 6.20566865282203 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 125.948945736151 Dec: 6.19443852973039 [deg; J2000]
{ 08h 23m 47.7s , +06d 11' 40.0" }
+/- 1.85467090399224 [arcmin] (estimated 90% radius based on SNR)
+/- 0.70504519514209 [arcmin] (formal 1-sigma fit error)
SNR: 12.58577635569
Angular difference between the analysis and refined position is 1.256887 arcmin
Partial Coding Fraction: 0.8046875 [ including projection effects ]
Duration
T90: 12.4879999160767 +/- 4.20341810663401
Measured from: -9.50800001621246
to: 2.9799998998642 [s; relative to TRIGTIME]
T50: 4.39599990844727 +/- 1.82103493633097
Measured from: -3.02799999713898
to: 1.36799991130829 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.479999899864197
to: 1.4799998998642 [s; relative to TRIGTIME]
Total Fluence
Measured from: -12.0360000133514
to: 3.30399990081787 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.161565 0.264346 0.252307 0.001988
0.028814 0.030101 0.026589 0.022730 [error]
Peak 0.022956 0.044222 0.048606 0.014019
0.007527 0.008370 0.007294 0.006309 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 15.340 -12.036 3.304
T90 12.488 -9.508 2.980
T50 4.396 -3.028 1.368
Peak 1.000 0.480 1.480
====== 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 -1.269 -0.195 0.197 - - - 3.23e-03 -3.78e-04 3.78e-04 41.320 57
CPL -0.413 -0.795 0.981 99.453 -28.281 422.256 8.22e-03 -4.70e-03 1.45e-02 37.900 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 -0.331 0.355 - - - 8.57e-03 -1.61e-03 1.59e-03 74.810 57
CPL -0.957 0.957 1.204 873.500 -873.500 -873.500 9.21e-03 -2.20e-03 -9.21e-03 74.870 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 5.10e-08 1.08e-07 1.79e-07 6.76e-07 4.94e-07 1.01e-06 erg/cm2
90%_error_low -1.06e-08 -1.43e-08 -2.50e-08 -1.84e-07 -6.29e-08 -2.04e-07 erg/cm2
90%_error_hi 1.12e-08 1.41e-08 2.48e-08 2.26e-07 6.34e-08 2.38e-07 erg/cm2
Peak flux PL 2.24e-01 3.00e-01 2.94e-01 5.18e-01 9.88e-01 1.34e+00 ph/cm2/s
90%_error_low -8.43e-02 -7.40e-02 -5.81e-02 -1.96e-01 -1.90e-01 -2.56e-01 ph/cm2/s
90%_error_hi 9.67e-02 7.13e-02 5.70e-02 2.67e-01 1.91e-01 2.68e-01 ph/cm2/s
Fluence CPL 4.27e-08 1.16e-07 1.93e-07 2.45e-07 4.70e-07 5.96e-07 erg/cm2
90%_error_low -1.29e-08 -1.67e-08 -2.90e-08 -1.37e-07 -6.71e-08 -1.51e-07 erg/cm2
90%_error_hi 1.35e-08 1.72e-08 2.98e-08 3.79e-07 6.75e-08 3.74e-07 erg/cm2
Peak flux CPL 2.33e-01 3.01e-01 2.93e-01 5.44e-01 9.91e-01 1.33e+00 ph/cm2/s
90%_error_low -1.10e-01 N/A -5.69e-02 N/A -1.99e-01 -4.08e-01 ph/cm2/s
90%_error_hi 8.88e-02 N/A 6.90e-02 N/A 1.94e-01 2.45e-01 ph/cm2/s
======================================================================
Special notes of this burst