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.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time: Sun Jan 19 23:51:46 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger318094
======================================================================
Trigger: 00318094 Segment: 000
BAT Trigger Time: 238831062.336 [s; MET]
Trigger Stop: 238831067.84 [s; MET]
UTC: 2008-07-27T05:57:39.363900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 208.388757842545 Dec: -18.5488483391044 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.3
Image Trigger?: NO
Rate S/N Ratio: 14.422205101856 [ if not an image trigger ]
Image S/N Ratio: 7.3
Analysis Position: [ source = BAT ]
RA: 208.388757842545 Dec: -18.5488483391044 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 208.42327439217 Dec: -18.5770668090244 [deg; J2000]
{ 13h 53m 41.6s , -18d 34' 37.4" }
+/- 2.43684074756541 [arcmin] (estimated 90% radius based on SNR)
+/- 1.23948242939938 [arcmin] (formal 1-sigma fit error)
SNR: 8.52134538587885
Angular difference between the analysis and refined position is 2.592481 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 4.91200000047684 +/- 0.915860247912174
Measured from: 0.0600000023841858
to: 4.97200000286102 [s; relative to TRIGTIME]
T50: 2.72400000691414 +/- 1.24247012366982
Measured from: 1.02000001072884
to: 3.74400001764297 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.2039999961853
to: 2.2039999961853 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.139999985694885
to: 5.1879999935627 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.047941 0.069122 0.066854 0.025742
0.013936 0.012573 0.011424 0.010243 [error]
Peak 0.013045 0.012105 0.015474 0.015841
0.005996 0.005458 0.004962 0.004534 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 5.328 -0.140 5.188
T90 4.912 0.060 4.972
T50 2.724 1.020 3.744
Peak 1.000 1.204 2.204
====== 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 -1.223 -0.340 0.345 - - - 2.49e-03 -4.57e-04 4.57e-04 40.980 57
CPL -0.757 -1.800 1.623 147.650 -147.650 -147.650 4.06e-03 N/A N/A 40.580 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 -0.207 1.919 0.207 - - - 2.44e-03 -2.44e-03 -1.97e-03 48.010 57
CPL -0.320 -0.839 0.320 9999.360 -9999.360 -9999.360 2.58e-03 -2.58e-03 -2.58e-03 48.080 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 1.31e-08 2.85e-08 4.88e-08 1.93e-07 1.34e-07 2.84e-07 erg/cm2
90%_error_low -4.41e-09 -6.09e-09 -1.10e-08 -8.28e-08 -2.73e-08 -9.16e-08 erg/cm2
90%_error_hi 5.00e-09 5.93e-09 1.09e-08 1.20e-07 2.78e-08 1.24e-07 erg/cm2
Peak flux PL 2.93e-02 6.46e-02 1.12e-01 4.56e-01 3.08e-01 6.61e-01 ph/cm2/s
90%_error_low -2.93e-02 -6.46e-02 -1.12e-01 -1.01e-01 -3.08e-01 -2.84e-01 ph/cm2/s
90%_error_hi 6.58e-02 6.10e-02 -7.01e-02 1.40e+00 9.00e-02 1.41e+00 ph/cm2/s
Fluence CPL 1.17e-08 2.93e-08 5.08e-08 1.06e-07 1.30e-07 1.97e-07 erg/cm2
90%_error_low -5.62e-09 -6.54e-09 -1.21e-08 -8.01e-08 -2.97e-08 -8.69e-08 erg/cm2
90%_error_hi 5.97e-09 6.77e-09 1.28e-08 1.15e-07 2.98e-08 1.22e-07 erg/cm2
Peak flux CPL N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_low -2.93e-02 -6.46e-02 -1.12e-01 -1.01e-01 -3.08e-01 -2.84e-01 ph/cm2/s
90%_error_hi 6.58e-02 6.10e-02 -7.01e-02 1.40e+00 9.00e-02 1.41e+00 ph/cm2/s
======================================================================
Special notes of this burst