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: Sun Mar 1 23:02:15 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger631051
======================================================================
Trigger: 00631051 Segment: 000
BAT Trigger Time: 445559504 [s; MET]
Trigger Stop: 445559568 [s; MET]
UTC: 2015-02-13T22:31:30.817240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 253.42510590632 Dec: 34.1786965238723 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.03
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.03
Analysis Position: [ source = BAT ]
RA: 253.42510590632 Dec: 34.1786965238723 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 253.447648236967 Dec: 34.1630797570746 [deg; J2000]
{ 16h 53m 47.4s , +34d 09' 47.1" }
+/- 1.80899661834305 [arcmin] (estimated 90% radius based on SNR)
+/- 0.869108927567478 [arcmin] (formal 1-sigma fit error)
SNR: 13.0421790621574
Angular difference between the analysis and refined position is 1.459535 arcmin
Partial Coding Fraction: 0.1367188 [ including projection effects ]
Duration
T90: 209 +/- 74.2428447730823
Measured from: 9
to: 218 [s; relative to TRIGTIME]
T50: 74 +/- 15.2315462117278
Measured from: 26
to: 100 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 18
to: 19 [s; relative to TRIGTIME]
Total Fluence
Measured from: 4
to: 291 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.458925 2.391896 1.173747 0.509223
0.167675 0.163898 0.137259 0.111195 [error]
Peak 0.068577 0.035709 0.000135 0.017264
0.016608 0.016114 0.012700 0.011725 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 287.000 4.000 291.000
T90 209.000 9.000 218.000
T50 74.000 26.000 100.000
Peak 1.000 18.000 19.000
====== 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 -1.744 -0.150 0.147 - - - 1.21e-03 -1.15e-04 1.14e-04 65.930 57
CPL -0.645 -0.731 0.948 53.620 -9.224 25.044 4.99e-03 -3.02e-03 1.24e-02 58.700 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 -3.038 -1.319 0.942 - - - 3.63e-03 -2.70e-03 3.57e-03 62.990 57
CPL 0.060 -2.081 -0.060 16.358 -0.435 10.402 8.74e-01 -8.74e-01 1.33e+09 61.990 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 5.58e-07 8.84e-07 1.06e-06 2.46e-06 3.21e-06 4.95e-06 erg/cm2
90%_error_low -7.48e-08 -7.86e-08 -1.31e-07 -5.67e-07 -3.14e-07 -7.05e-07 erg/cm2
90%_error_hi 7.69e-08 7.86e-08 1.32e-07 6.71e-07 3.17e-07 7.82e-07 erg/cm2
Peak flux PL 6.71e-01 2.77e-01 6.74e-02 2.00e-02 1.03e+00 1.04e+00 ph/cm2/s
90%_error_low -2.99e-01 -1.54e-01 -6.74e-02 -2.00e-02 -4.13e-01 -4.18e-01 ph/cm2/s
90%_error_hi 2.99e-01 1.50e-01 9.86e-02 8.24e-02 4.15e-01 4.23e-01 ph/cm2/s
Fluence CPL 4.99e-07 1.01e-06 1.03e-06 5.15e-07 2.89e-06 3.05e-06 erg/cm2
90%_error_low -8.55e-08 -1.12e-07 -1.76e-07 -3.33e-07 -3.68e-07 -4.91e-07 erg/cm2
90%_error_hi 8.65e-08 1.19e-07 1.58e-07 8.29e-07 3.78e-07 8.74e-07 erg/cm2
Peak flux CPL 7.62e-01 1.86e-01 1.15e-04 8.76e-13 9.47e-01 9.51e-01 ph/cm2/s
90%_error_low -3.57e-01 -1.86e-01 N/A -8.76e-13 -3.68e-01 -3.71e-01 ph/cm2/s
90%_error_hi 3.42e-01 2.85e-01 N/A -8.76e-13 4.22e-01 4.19e-01 ph/cm2/s
======================================================================
Special notes of this burst