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: Fri Jun 26 00:18:20 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger642018
======================================================================
Trigger: 00642018 Segment: 000
BAT Trigger Time: 454678951.872 [s; MET]
Trigger Stop: 454678952.896 [s; MET]
UTC: 2015-05-30T11:42:18.222320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 327.523415997874 Dec: 57.4904208320749 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.11
Image Trigger?: NO
Rate S/N Ratio: 23.7697286480094 [ if not an image trigger ]
Image S/N Ratio: 9.11
Analysis Position: [ source = BAT ]
RA: 327.523415997874 Dec: 57.4904208320749 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 327.511672646044 Dec: 57.5186072495788 [deg; J2000]
{ 21h 50m 02.8s , +57d 31' 07.0" }
+/- 1.20346359197235 [arcmin] (estimated 90% radius based on SNR)
+/- 0.401392262154241 [arcmin] (formal 1-sigma fit error)
SNR: 23.3460900749071
Angular difference between the analysis and refined position is 1.733031 arcmin
Partial Coding Fraction: 0.1757812 [ including projection effects ]
Duration
T90: 6.89600002765656 +/- 0.817253912009944
Measured from: -3.95199996232986
to: 2.94400006532669 [s; relative to TRIGTIME]
T50: 3.0560000538826 +/- 0.572433362789055
Measured from: -1.61599999666214
to: 1.44000005722046 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.467999994754791
to: 1.46799999475479 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.783999979496
to: 3.28000003099442 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.612667 0.896375 0.842826 0.239208
0.052958 0.058947 0.051920 0.039808 [error]
Peak 0.095462 0.155519 0.154298 0.078120
0.018679 0.022651 0.020814 0.015981 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 8.064 -4.784 3.280
T90 6.896 -3.952 2.944
T50 3.056 -1.616 1.440
Peak 1.000 0.468 1.468
====== 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 -1.488 -0.113 0.113 - - - 2.31e-02 -1.54e-03 1.54e-03 69.790 57
CPL -1.109 -0.417 0.471 128.415 -45.438 -128.415 3.48e-02 -1.23e-02 2.23e-02 67.510 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 -1.237 -0.231 0.237 - - - 3.45e-02 -4.65e-03 4.64e-03 43.490 57
CPL -1.229 -0.235 0.235 9998.890 -9998.890 -9998.890 3.46e-02 -3.46e-02 2.99e-02 43.500 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 2.35e-07 4.35e-07 6.21e-07 1.87e-06 1.77e-06 3.16e-06 erg/cm2
90%_error_low -2.77e-08 -3.21e-08 -5.03e-08 -3.07e-07 -1.25e-07 -3.46e-07 erg/cm2
90%_error_hi 2.88e-08 3.19e-08 5.00e-08 3.44e-07 1.25e-07 3.73e-07 erg/cm2
Peak flux PL 1.10e+00 1.30e+00 1.10e+00 1.59e+00 4.07e+00 5.09e+00 ph/cm2/s
90%_error_low -2.85e-01 -2.17e-01 -1.65e-01 -4.53e-01 -5.81e-01 -6.93e-01 ph/cm2/s
90%_error_hi 3.09e-01 2.11e-01 1.63e-01 5.51e-01 5.82e-01 6.98e-01 ph/cm2/s
Fluence CPL 2.17e-07 4.50e-07 6.46e-07 1.16e-06 1.74e-06 2.48e-06 erg/cm2
90%_error_low -3.40e-08 -3.63e-08 -5.82e-08 -4.60e-07 -1.30e-07 -4.70e-07 erg/cm2
90%_error_hi 3.48e-08 3.71e-08 5.94e-08 7.53e-07 1.29e-07 8.15e-07 erg/cm2
Peak flux CPL 1.12e+00 1.30e+00 1.10e+00 1.70e+00 4.09e+00 5.11e+00 ph/cm2/s
90%_error_low N/A -2.20e-01 -1.61e-01 -1.70e+00 -6.41e-01 -9.39e-01 ph/cm2/s
90%_error_hi N/A 2.10e-01 1.75e-01 9.98e-01 6.32e-01 6.68e-01 ph/cm2/s
======================================================================
Special notes of this burst