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 Ver: batgrbproduct v2.46
Process Start Time: Mon Jun 22 17:47:15 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/ground_detect_bursts/scripts
======================================================================
Trigger: 00308549 Segment: 000
BAT Trigger Time: 229079937.6
UTC: 2008-04-05T09:18:54.90 [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: 162.62554145 Dec: -4.25622439895 [deg; J2000]
{ 10h 50m 30.1s , -4d -15' -22.4" }
+/- 2.51411725771 [arcmin] (estimated 90% radius based on SNR)
SNR: 8.15071804977
Angular difference between the analysis and refined position is Usage: arcmin
Partial Coding Fraction: 0.296875 [ including projection effects ]
Duration
T90: 64. +/- 1.60000002384186
Measured from: 3.2
to: 67.2 [s; relative to TRIGTIME]
T50: 32.0000000298023 +/- 1.6
Measured from: 16
to: 48 [s; relative to TRIGTIME]
====== Table of the duration information =============================
Value tstart tstop
T100 72.000 0.000 72.000
T90 64.000 3.200 67.200
T50 32.000 16.000 48.000
Peak 1.000 25.900 26.900
====== 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 -1.254 -0.097 0.098 - - - 1.43e-02 -7.48e-04 7.48e-04 56.050 57
CPL -1.251 -0.097 0.298 9999.150 -9999.150 -9999.150 1.44e-02 -7.51e-04 7.51e-04 56.060 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 N/A N/A N/A - - - N/A N/A N/A N/A N/A
CPL N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
=== 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-07 2.94e-07 4.92e-07 1.89e-06 1.35e-06 2.81e-06 erg/cm2
90%_error_low -1.42e-08 -1.80e-08 -3.12e-08 -2.62e-07 -7.80e-08 -2.81e-07 erg/cm2
90%_error_hi 1.47e-08 1.79e-08 3.10e-08 2.91e-07 7.83e-08 3.05e-07 erg/cm2
Peak flux PL N/A N/A N/A N/A N/A N/A ph/cm2/s
Special notes of this burst