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 22:25:49 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger325268
======================================================================
Trigger: 00325268 Segment: 000
BAT Trigger Time: 243475516.16 [s; MET]
Trigger Stop: 243475516.672 [s; MET]
UTC: 2008-09-19T00:05:13.051580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 265.288933640242 Dec: -42.3961038809504 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.57
Image Trigger?: NO
Rate S/N Ratio: 26 [ if not an image trigger ]
Image S/N Ratio: 6.57
Analysis Position: [ source = BAT ]
RA: 265.288933640242 Dec: -42.3961038809504 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 265.227296792695 Dec: -42.3700466440115 [deg; J2000]
{ 17h 40m 54.6s , -42d 22' 12.2" }
+/- 1.91305287867778 [arcmin] (estimated 90% radius based on SNR)
+/- 0.921355200917208 [arcmin] (formal 1-sigma fit error)
SNR: 12.0406871816966
Angular difference between the analysis and refined position is 3.147461 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 0.599999994039536 +/- 0.0840951674734262
Measured from: 0.120000004768372
to: 0.719999998807907 [s; relative to TRIGTIME]
T50: 0.328000009059906 +/- 0.0850411706287281
Measured from: 0.236000001430511
to: 0.564000010490417 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0740000009536743
to: 0.925999999046326 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0920000076293945
to: 0.759999990463257 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.020270 0.034365 0.034188 0.017558
0.004887 0.004805 0.004340 0.003786 [error]
Peak 0.022026 0.038715 0.038705 0.018690
0.005849 0.005682 0.005072 0.004433 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 0.668 0.092 0.760
T90 0.600 0.120 0.720
T50 0.328 0.236 0.564
Peak 1.000 -0.074 0.926
====== 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 -0.949 -0.259 0.276 - - - 9.86e-03 -1.42e-03 1.40e-03 51.820 57
CPL -0.891 -0.319 0.683 991.890 -991.890 -991.890 1.05e-02 -2.05e-03 7.43e-04 51.990 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 -0.977 -0.268 0.286 - - - 7.33e-03 -1.11e-03 1.10e-03 62.100 57
CPL -0.974 -0.266 0.390 9999.360 -9999.360 -9999.360 7.37e-03 -1.10e-03 1.31e-02 62.110 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 5.03e-09 1.30e-08 2.69e-08 1.42e-07 7.25e-08 1.87e-07 erg/cm2
90%_error_low -1.50e-09 -2.42e-09 -4.09e-09 -4.56e-08 -1.08e-08 -4.78e-08 erg/cm2
90%_error_hi 1.67e-09 2.34e-09 4.03e-09 6.13e-08 1.08e-08 6.18e-08 erg/cm2
Peak flux PL 1.83e-01 2.52e-01 2.56e-01 4.74e-01 8.43e-01 1.16e+00 ph/cm2/s
90%_error_low -5.71e-02 -5.05e-02 -4.02e-02 -1.47e-01 -1.30e-01 -1.83e-01 ph/cm2/s
90%_error_hi 6.42e-02 4.93e-02 3.97e-02 1.92e-01 1.31e-01 1.92e-01 ph/cm2/s
Fluence CPL 5.27e-09 1.29e-08 2.64e-08 1.53e-07 7.34e-08 1.89e-07 erg/cm2
90%_error_low -1.82e-09 N/A N/A -9.71e-08 -1.13e-08 -9.01e-08 erg/cm2
90%_error_hi 1.11e-09 N/A N/A 1.53e-08 9.85e-09 2.37e-08 erg/cm2
Peak flux CPL 1.84e-01 2.52e-01 2.56e-01 4.70e-01 8.44e-01 1.17e+00 ph/cm2/s
90%_error_low -4.00e-02 -4.50e-02 -3.99e-02 N/A -1.34e-01 -3.43e-01 ph/cm2/s
90%_error_hi 6.37e-02 5.22e-02 4.73e-02 N/A 1.30e-01 1.71e-01 ph/cm2/s
======================================================================
Special notes of this burst