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 GROUND-DETECTED GRB DATA PROCESSING REPORT
Process Script: hand-made scripts that follow steps in batgrbproduct
but without using TDRSS info
Process Start Time: Tue Sep 30 00:03:30 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/ground_detect_bursts/scripts
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BAT Trigger Time: 222643798.08
UTC: 2008-01-21T21:29:55.561 [includes UTCF correction]
Where From?: Ground analysis (best_duration.txt)
NOTE: BAT trigger time for ground-detected burst is the T100 start time.
Refined Position: [ source = BAT pre-slew image ]
RA: 137.257457051 Dec: 41.8392508673 [deg; J2000]
{ 09h 09m 01.8s , +41d 50' 21.3" }
+/- 2.4791111952 [arcmin] (estimated 90% radius based on SNR)
SNR: 8.31563059263
Angular difference between the analysis and refined position is Usage: arcmin
Partial Coding Fraction: 6.328125e-01 [ including projection effects ]
Duration (found by FRED-model fit)
T90: 0.32 +/- N/A
Measured from: 0.048
to: 0.368 [s; relative to TRIGTIME]
T50: 0.128 +/- N/A
Measured from: 0.128
to: 0.256
====== Table of the duration information =============================
Value tstart tstop
T100 0.496 0.000 0.496
T90 0.320 0.048 0.368
T50 0.128 0.128 0.256
Peak 1.000 -0.281 0.719
====== 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: 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 -1.614 -0.471 0.446 - - - 7.17e-03 -2.06e-03 1.98e-03 72.330 57
CPL -1.325 -1.072 1.772 107.717 -107.717 -107.717 1.02e-02 -1.02e-02 7.44e-02 72.190 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 -2.224 -0.513 0.433 - - - 4.06e-03 -1.48e-03 1.47e-03 69.530 57
CPL -1.225 -0.891 3.709 27.151 N/A N/A 1.80e-02 N/A N/A 68.530 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 5.05e-09 8.66e-09 1.13e-08 3.00e-08 3.32e-08 5.50e-08 erg/cm2
90%_error_low -1.89e-09 -2.21e-09 -4.22e-09 -1.77e-08 -9.91e-09 -2.28e-08 erg/cm2
90%_error_hi 2.02e-09 2.20e-09 4.28e-09 3.00e-08 1.03e-08 3.28e-08 erg/cm2
Peak flux PL 3.37e-01 2.22e-01 9.49e-02 5.57e-02 6.81e-01 7.09e-01 ph/cm2/s
90%_error_low -9.51e-02 -5.72e-02 -4.21e-02 -3.53e-02 -1.61e-01 -1.72e-01 ph/cm2/s
90%_error_hi 9.73e-02 5.57e-02 4.74e-02 6.19e-02 1.61e-01 1.75e-01 ph/cm2/s
Fluence CPL 4.87e-09 9.00e-09 1.14e-08 1.81e-08 3.23e-08 4.34e-08 erg/cm2
90%_error_low -2.17e-09 -2.49e-09 -4.53e-09 N/A -1.04e-08 -2.06e-08 erg/cm2
90%_error_hi 2.08e-09 2.79e-09 4.62e-09 N/A 1.09e-08 2.05e-08 erg/cm2
Peak flux CPL 3.28e-01 2.49e-01 8.14e-02 1.15e-02 6.68e-01 6.70e-01 ph/cm2/s
90%_error_low -1.02e-01 N/A -8.14e-02 -1.15e-02 -1.59e-01 N/A ph/cm2/s
90%_error_hi 1.02e-01 N/A 5.67e-02 9.60e-02 1.61e-01 N/A ph/cm2/s
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Special notes of this burst