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: Wed May 3 17:03:03 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger748947
======================================================================
Trigger: 00748947 Segment: 000
BAT Trigger Time: 514330444.992 [s; MET]
Trigger Stop: 514330446.016 [s; MET]
UTC: 2017-04-19T21:33:46.057280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 60.4979072457145 Dec: -15.1426180694188 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.51
Image Trigger?: NO
Rate S/N Ratio: 15.6204993518133 [ if not an image trigger ]
Image S/N Ratio: 9.51
Analysis Position: [ source = BAT ]
RA: 60.4979072457145 Dec: -15.1426180694188 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 60.4932431992966 Dec: -15.1199588089071 [deg; J2000]
{ 04h 01m 58.4s , -15d 07' 11.9" }
+/- 1.36949527471954 [arcmin] (estimated 90% radius based on SNR)
+/- 0.634765071747146 [arcmin] (formal 1-sigma fit error)
SNR: 19.4102843214075
Angular difference between the analysis and refined position is 1.386134 arcmin
Partial Coding Fraction: 0.5234375 [ including projection effects ]
Duration
T90: 65.8559999465942 +/- 11.260154565347
Measured from: 1
to: 66.8559999465942 [s; relative to TRIGTIME]
T50: 29.2199999690056 +/- 7.63655344187067
Measured from: 3.14399999380112
to: 32.3639999628067 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.98400002717972
to: 2.98400002717972 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.276000022888184
to: 87.2280000448227 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.664453 1.057691 0.917938 0.129125
0.069700 0.074353 0.066476 0.062439 [error]
Peak 0.039192 0.090210 0.114874 0.053908
0.008685 0.009733 0.009796 0.007631 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 86.952 0.276 87.228
T90 65.856 1.000 66.856
T50 29.220 3.144 32.364
Peak 1.000 1.984 2.984
====== 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 -1.372 -0.130 0.131 - - - 2.29e-03 -1.75e-04 1.75e-04 56.330 57
CPL -0.706 -0.553 0.638 99.333 -26.453 205.875 4.88e-03 -2.24e-03 5.00e-03 52.010 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 -0.809 -0.173 0.182 - - - 2.05e-02 -2.15e-03 2.11e-03 64.500 57
CPL -0.801 -0.176 0.573 9997.640 -9997.640 -9997.640 2.06e-02 -2.00e-03 1.43e-02 64.510 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 2.25e-07 4.47e-07 6.91e-07 2.34e-06 1.93e-06 3.71e-06 erg/cm2
90%_error_low -3.01e-08 -3.72e-08 -6.57e-08 -4.48e-07 -1.62e-07 -5.00e-07 erg/cm2
90%_error_hi 3.13e-08 3.70e-08 6.54e-08 5.17e-07 1.63e-07 5.56e-07 erg/cm2
Peak flux PL 4.36e-01 6.64e-01 7.59e-01 1.65e+00 2.35e+00 3.51e+00 ph/cm2/s
90%_error_low -9.56e-02 -9.32e-02 -7.43e-02 -3.35e-01 -2.39e-01 -3.74e-01 ph/cm2/s
90%_error_hi 1.04e-01 9.18e-02 7.40e-02 3.91e-01 2.40e-01 3.90e-01 ph/cm2/s
Fluence CPL 1.99e-07 4.76e-07 7.22e-07 9.60e-07 1.84e-06 2.36e-06 erg/cm2
90%_error_low -3.66e-08 -4.50e-08 -7.32e-08 -4.59e-07 -1.81e-07 -4.87e-07 erg/cm2
90%_error_hi 3.74e-08 4.63e-08 7.45e-08 1.01e-06 1.81e-07 1.01e-06 erg/cm2
Peak flux CPL 4.35e-01 6.65e-01 7.59e-01 1.64e+00 2.35e+00 3.54e+00 ph/cm2/s
90%_error_low N/A N/A N/A N/A N/A -7.70e-01 ph/cm2/s
90%_error_hi N/A N/A N/A N/A N/A 3.59e-01 ph/cm2/s
======================================================================
Special notes of this burst