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 Jan 22 17:29:14 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger205851
======================================================================
Trigger: 00205851 Segment: 000
BAT Trigger Time: 167022369.344 [s; MET]
Trigger Stop: 167022370.368 [s; MET]
UTC: 2006-04-18T03:06:08.204500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 236.419948391906 Dec: -3.64343384352562 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.8
Image Trigger?: NO
Rate S/N Ratio: 28.9309522829789 [ if not an image trigger ]
Image S/N Ratio: 10.8
Analysis Position: [ source = BAT ]
RA: 236.419948391906 Dec: -3.64343384352562 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 236.430661828296 Dec: -3.63965249246618 [deg; J2000]
{ 15h 45m 43.4s , -03d 38' 22.7" }
+/- 0.969578605224568 [arcmin] (estimated 90% radius based on SNR)
+/- 0.500532965683523 [arcmin] (formal 1-sigma fit error)
SNR: 31.7896311502763
Angular difference between the analysis and refined position is 0.680447 arcmin
Partial Coding Fraction: 0.3046875 [ including projection effects ]
Duration
T90: 109.080000013113 +/- 46.7255162820641
Measured from: -45.6200000047684
to: 63.4600000083447 [s; relative to TRIGTIME]
T50: 25.4920000135899 +/- 0.68913860008981
Measured from: 2.0799999833107
to: 27.5719999969006 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 27.4519999921322
to: 28.4519999921322 [s; relative to TRIGTIME]
Total Fluence
Measured from: -82.4560000002384
to: 136.619999974966 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.234725 5.224577 3.668461 0.930035
0.127418 0.117749 0.102110 0.090026 [error]
Peak 0.215832 0.289826 0.235451 0.053250
0.012172 0.012617 0.011528 0.008156 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 219.076 -82.456 136.620
T90 109.080 -45.620 63.460
T50 25.492 2.080 27.572
Peak 1.000 27.452 28.452
====== 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 -1.681 -0.057 0.056 - - - 4.13e-03 -1.20e-04 1.19e-04 59.350 57
CPL -1.553 -0.163 0.226 182.814 -112.680 -182.814 4.76e-03 -7.08e-04 1.29e-03 58.330 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 -1.498 -0.089 0.089 - - - 5.26e-02 -2.60e-03 2.59e-03 54.680 57
CPL -1.313 -0.231 0.360 194.981 N/A N/A 6.46e-02 N/A N/A 53.800 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 1.37e-06 2.26e-06 2.81e-06 6.97e-06 8.40e-06 1.34e-05 erg/cm2
90%_error_low -7.63e-08 -7.20e-08 -1.07e-07 -5.83e-07 -2.52e-07 -6.47e-07 erg/cm2
90%_error_hi 7.81e-08 7.18e-08 1.06e-07 6.20e-07 2.53e-07 6.75e-07 erg/cm2
Peak flux PL 2.16e+00 2.18e+00 1.54e+00 1.73e+00 6.56e+00 7.61e+00 ph/cm2/s
90%_error_low -1.92e-01 -1.18e-01 -9.50e-02 -2.16e-01 -3.33e-01 -3.73e-01 ph/cm2/s
90%_error_hi 1.99e-01 1.17e-01 9.45e-02 2.34e-01 3.34e-01 3.73e-01 ph/cm2/s
Fluence CPL 1.33e-06 2.27e-06 2.84e-06 5.79e-06 8.31e-06 1.22e-05 erg/cm2
90%_error_low -9.56e-08 -7.82e-08 -1.13e-07 -1.51e-06 -2.93e-07 -1.54e-06 erg/cm2
90%_error_hi 9.96e-08 7.88e-08 1.14e-07 1.16e-06 2.91e-07 1.43e-06 erg/cm2
Peak flux CPL 2.02e+00 1.56e+00 8.43e-01 7.84e-01 4.75e+00 5.21e+00 ph/cm2/s
90%_error_low -1.45e-01 -1.89e-01 -8.24e-02 -9.33e-02 -5.59e-01 -5.56e-01 ph/cm2/s
90%_error_hi 2.44e-01 1.69e-01 6.87e-02 8.57e-02 4.91e-01 4.69e-01 ph/cm2/s
======================================================================