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.
Special note: Due to the low partial coding fraction, the refined position is found using the DETECTION mask. Therefore, the refined position and the mask shadow pattern shown here are from analyses with DETECTION mask, everything else uses the FLUX mask.
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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 Oct 21 01:37:36 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: 427199289.6
UTC: 2014-07-16T10:27:57.328 [includes UTCF correction]
Where From?: Ground analysis (best_duration.txt)
NOTE: BAT trigger time for ground-detected burst is the T100 start time.
Analysis Position: [ source = GCN ]
RA: 108.175 Dec: -60.153 [deg; J2000]
Refined Position: [ source = BAT pre-slew image ]
RA: 108.175 Dec: -60.1531 [deg; J2000]
{ 07h 12m 42.0s , -60d -9' -11.2" }
+/- 3.05557009359 [arcmin] (estimated 90% radius based on SNR)
SNR: 6.16859515
Angular difference between the analysis and refined position is 0.006000 arcmin
Partial Coding Fraction: 6.933594e-02 [ including projection effects ]
Duration
T90: 124.800000071526 +/- 1.6
Measured from: 4.8
to: 129.6 [s; relative to TRIGTIME]
T50: 68.8000000119209 +/- 1.6
Measured from: 33.6
to: 102.4 [s; relative to TRIGTIME]
====== Table of the duration information =============================
Value tstart tstop
T100 136.000 0.000 136.000
T90 124.800 4.800 129.600
T50 68.800 33.600 102.400
Peak 1.000 0.300 1.300
====== 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 -1.801 -0.560 0.519 - - - 1.16e-02 -3.60e-03 3.50e-03 56.000 57
CPL -1.455 -1.082 2.690 82.122 N/A N/A 1.71e-02 N/A N/A 55.910 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 -1.341 -0.396 0.399 - - - 4.99e-02 -1.18e-02 1.18e-02 42.790 57
CPL -0.184 -1.417 2.856 92.847 -33.970 -92.847 1.57e-01 -1.57e-01 1.86e+00 41.630 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 1.46e-07 2.24e-07 2.57e-07 5.64e-07 7.94e-07 1.19e-06 erg/cm2
90%_error_low -6.71e-08 -6.98e-08 -1.03e-07 -3.58e-07 -2.45e-07 -4.78e-07 erg/cm2
90%_error_hi 7.75e-08 6.83e-08 9.99e-08 6.06e-07 2.47e-07 6.45e-07 erg/cm2
Peak flux PL 1.76e+00 1.95e+00 1.54e+00 2.01e+00 6.00e+00 7.27e+00 ph/cm2/s
90%_error_low -7.30e-01 -5.60e-01 -4.07e-01 -9.14e-01 -1.52e+00 -1.72e+00 ph/cm2/s
90%_error_hi 8.60e-01 5.48e-01 3.98e-01 1.24e+00 1.54e+00 1.72e+00 ph/cm2/s
Fluence CPL N/A N/A N/A N/A N/A N/A erg/cm2
90%_error_low -6.71e-08 -6.98e-08 -1.03e-07 -3.58e-07 -2.45e-07 -4.78e-07 erg/cm2
90%_error_hi 7.75e-08 6.83e-08 9.99e-08 6.06e-07 2.47e-07 6.45e-07 erg/cm2
Peak flux CPL 6.87e-01 4.33e-01 1.84e-01 1.29e-01 1.36e+00 1.43e+00 ph/cm2/s
90%_error_low -6.87e-01 9.45e-01 -1.84e-01 -1.29e-01 N/A N/A ph/cm2/s
90%_error_hi 1.34e+00 2.24e+00 2.29e+00 2.49e-01 N/A N/A ph/cm2/s
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Special notes of this burst