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: Mon Jan 20 08:19:54 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger285948
======================================================================
Trigger: 00285948 Segment: 000
BAT Trigger Time: 206967232.32 [s; MET]
Trigger Stop: 206967232.832 [s; MET]
UTC: 2007-07-24T10:53:50.211640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 27.8178746741569 Dec: -18.6216425472074 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.71
Image Trigger?: NO
Rate S/N Ratio: 13.0384048104053 [ if not an image trigger ]
Image S/N Ratio: 8.71
Analysis Position: [ source = BAT ]
RA: 27.8178746741569 Dec: -18.6216425472074 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 27.8221260545431 Dec: -18.606926437213 [deg; J2000]
{ 01h 51m 17.3s , -18d 36' 24.9" }
+/- 2.25588103450103 [arcmin] (estimated 90% radius based on SNR)
+/- 1.14066683450112 [arcmin] (formal 1-sigma fit error)
SNR: 9.51439026023414
Angular difference between the analysis and refined position is 0.915460 arcmin
Partial Coding Fraction: 0.9140625 [ including projection effects ]
Duration
T90: 0.432000011205673 +/- 0.0863712981793007
Measured from: 0.00400000810623169
to: 0.436000019311905 [s; relative to TRIGTIME]
T50: 0.227999985218048 +/- 0.0712179940465239
Measured from: 0.112000018358231
to: 0.340000003576279 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.282000005245209
to: 0.717999994754791 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0279999971389771
to: 0.46000000834465 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.022668 0.022279 0.013210 0.001359
0.003570 0.003682 0.003239 0.002554 [error]
Peak 0.025876 0.026933 0.013150 0.001302
0.004844 0.004973 0.004343 0.003612 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 0.488 -0.028 0.460
T90 0.432 0.004 0.436
T50 0.228 0.112 0.340
Peak 1.000 -0.282 0.718
====== 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 -1.861 -0.324 0.296 - - - 6.88e-03 -1.53e-03 1.48e-03 53.110 57
CPL -0.680 -1.309 1.823 45.854 -17.118 -45.854 3.39e-02 -3.39e-02 3.82e-01 50.880 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 -1.940 -0.373 0.335 - - - 3.73e-03 -9.98e-04 9.75e-04 48.990 57
CPL 0.407 -1.821 2.898 38.773 -9.035 16.149 1.01e-01 -1.01e-01 7.43e+00 43.700 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 6.02e-09 8.89e-09 9.79e-09 2.03e-08 3.09e-08 4.50e-08 erg/cm2
90%_error_low -1.41e-09 -1.58e-09 -2.82e-09 -9.48e-09 -6.64e-09 -1.32e-08 erg/cm2
90%_error_hi 1.45e-09 1.58e-09 2.91e-09 1.37e-08 6.88e-09 1.65e-08 erg/cm2
Peak flux PL 2.35e-01 1.82e-01 9.49e-02 7.14e-02 5.44e-01 5.83e-01 ph/cm2/s
90%_error_low -6.19e-02 -3.83e-02 -3.14e-02 -3.61e-02 -1.13e-01 -1.24e-01 ph/cm2/s
90%_error_hi 6.43e-02 3.82e-02 3.30e-02 5.31e-02 1.13e-01 1.26e-01 ph/cm2/s
Fluence CPL 6.35e-09 8.68e-09 9.06e-09 2.08e-08 3.01e-08 4.51e-08 erg/cm2
90%_error_low -1.68e-09 -6.13e-10 -3.65e-09 -2.04e-08 -9.12e-09 -1.39e-08 erg/cm2
90%_error_hi 1.49e-09 4.00e-09 3.63e-09 2.97e-09 5.16e-09 8.37e-09 erg/cm2
Peak flux CPL 2.05e-01 2.37e-01 7.74e-02 4.49e-03 5.23e-01 5.23e-01 ph/cm2/s
90%_error_low -7.11e-02 -5.62e-02 -4.52e-02 -4.49e-03 -1.10e-01 -1.10e-01 ph/cm2/s
90%_error_hi 7.19e-02 5.87e-02 4.51e-02 3.21e-02 1.11e-01 1.12e-01 ph/cm2/s
======================================================================
Special notes of this burst