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
(This burst occurred during telescope slew)
Process Script Ver: batgrbproduct v2.46
Process Start Time: Tue Nov 11 10:53:32 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB081025
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Trigger: 00035650 Segment: 186
BAT Trigger Time: 246615786.152
UTC: 2008-10-25T08:23:02.950 [includes UTCF correction]
Where From?: Ground analysis (best_duration.txt)
NOTE: BAT trigger time for ground-detected burst during slew is the T100 start time.
Refined Position: [ source = BAT mosaic image ]
RA: 245.296295991584 Dec: 60.4546109105949 [deg; J2000]
{ 16h 21m 11.1s , +60d 27' 16.6" }
+/- 0.857492708679 [arcmin] (estimated 90% radius based on SNR)
SNR: 37.8931133745
Angular difference between the analysis and refined position is Usage: arcmin
Partial Coding Fraction: Unavailable because the burst occurred during slew.
Duration
T90: 22.7600000202656 +/- 1.02964071782397
Measured from: 1.848
to: 24.608 [s; relative to TRIGTIME]
T50: 16.5399999916553 +/- 0.625664446951632
Measured from: 4.452
to: 20.992 [s; relative to TRIGTIME]
====== Table of the duration information =============================
Value tstart tstop
T100 25.172 0.000 25.172
T90 22.760 1.848 24.608
T50 16.540 4.452 20.992
Peak 1.000 3.340 4.340
====== 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 -1.029 -0.075 0.076 - - - 6.99e-03 -2.91e-04 2.90e-04 43.240 57
CPL -0.922 -0.140 0.268 553.740 -334.563 -553.740 7.77e-03 -9.89e-04 2.16e-03 43.310 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 -0.806 -0.141 0.145 - - - 1.84e-02 -1.49e-03 1.48e-03 66.770 57
CPL -0.805 -0.136 0.179 9999.360 -9999.360 -9999.360 1.85e-02 -1.54e-03 1.07e-02 66.790 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 1.45e-07 3.55e-07 6.97e-07 3.38e-06 1.88e-06 4.57e-06 erg/cm2
90%_error_low -1.27e-08 -1.86e-08 -3.14e-08 -3.49e-07 -8.22e-08 -3.64e-07 erg/cm2
90%_error_hi 1.32e-08 1.85e-08 3.12e-08 3.79e-07 8.23e-08 3.89e-07 erg/cm2
Peak flux PL 3.91e-01 5.96e-01 6.82e-01 1.49e+00 2.11e+00 3.16e+00 ph/cm2/s
90%_error_low -6.62e-02 -6.30e-02 -5.64e-02 -2.60e-01 -1.68e-01 -2.90e-01 ph/cm2/s
90%_error_hi 7.05e-02 6.21e-02 5.60e-02 2.96e-01 1.68e-01 3.04e-01 ph/cm2/s
Fluence CPL 1.42e-07 3.57e-07 7.01e-07 3.31e-06 1.88e-06 4.30e-06 erg/cm2
90%_error_low -1.65e-08 -1.91e-08 -3.50e-08 -1.21e-06 -8.64e-08 -9.58e-07 erg/cm2
90%_error_hi 1.32e-08 1.94e-08 3.80e-08 2.79e-07 8.32e-08 3.00e-07 erg/cm2
Peak flux CPL 3.90e-01 5.97e-01 6.80e-01 1.48e+00 2.12e+00 3.22e+00 ph/cm2/s
90%_error_low N/A N/A N/A N/A N/A -7.44e-01 ph/cm2/s
90%_error_hi N/A N/A N/A N/A N/A 2.87e-01 ph/cm2/s
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Special notes of this burst