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 04:15:28 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger303631
======================================================================
Trigger: 00303631 Segment: 000
BAT Trigger Time: 225071869.76 [s; MET]
Trigger Stop: 225071873.856 [s; MET]
UTC: 2008-02-18T23:57:47.175420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 177.951347600546 Dec: -53.1004105987458 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.25
Image Trigger?: NO
Rate S/N Ratio: 11.7898261225516 [ if not an image trigger ]
Image S/N Ratio: 7.25
Analysis Position: [ source = BAT ]
RA: 177.951347600546 Dec: -53.1004105987458 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 177.927442200414 Dec: -53.0870378471626 [deg; J2000]
{ 11h 51m 42.6s , -53d 05' 13.3" }
+/- 2.01258624932174 [arcmin] (estimated 90% radius based on SNR)
+/- 1.39361482228635 [arcmin] (formal 1-sigma fit error)
SNR: 11.1991065960042
Angular difference between the analysis and refined position is 1.177143 arcmin
Partial Coding Fraction: 0.1015625 [ including projection effects ]
Duration
T90: 6.5280000269413 +/- 1.42857693147711
Measured from: -0.527999997138977
to: 6.00000002980232 [s; relative to TRIGTIME]
T50: 2.94400000572205 +/- 1.20245082782922
Measured from: 0.432000011205673
to: 3.37600001692772 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.412000000476837
to: 1.41200000047684 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.84799998998642
to: 6.57600000500679 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.482757 0.531959 0.097956 0.055327
0.055665 0.059159 0.048200 0.041815 [error]
Peak 0.123463 0.108841 0.054071 0.011913
0.021487 0.023340 0.019477 0.015681 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 7.424 -0.848 6.576
T90 6.528 -0.528 6.000
T50 2.944 0.432 3.376
Peak 1.000 0.412 1.412
====== 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 -2.531 -0.285 0.256 - - - 8.24e-03 -1.77e-03 1.77e-03 61.840 57
CPL 1.298 -2.146 4.860 27.026 -5.417 3.695 3.17e+00 -3.17e+00 6.77e+03 51.040 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 -3.264 -0.413 0.313 - - - 7.42e-03 -2.54e-03 2.40e-03 54.630 57
CPL -1.000 N/A N/A 80.000 N/A N/A 7.15e-03 N/A N/A 95.680 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 2.08e-07 2.05e-07 1.42e-07 1.55e-07 6.17e-07 7.10e-07 erg/cm2
90%_error_low -3.34e-08 -3.15e-08 -3.92e-08 -6.75e-08 -9.93e-08 -1.37e-07 erg/cm2
90%_error_hi 3.38e-08 3.09e-08 4.24e-08 9.58e-08 1.02e-07 1.56e-07 erg/cm2
Peak flux PL 1.71e+00 6.23e-01 1.30e-01 3.21e-02 2.49e+00 2.50e+00 ph/cm2/s
90%_error_low -4.25e-01 -1.55e-01 -5.18e-02 -1.79e-02 -5.68e-01 -5.69e-01 ph/cm2/s
90%_error_hi 4.29e-01 1.51e-01 5.19e-02 2.33e-02 5.68e-01 5.70e-01 ph/cm2/s
Fluence CPL N/A N/A N/A N/A N/A N/A erg/cm2
90%_error_low -3.34e-08 -3.15e-08 -3.92e-08 -6.75e-08 -9.93e-08 -1.37e-07 erg/cm2
90%_error_hi 3.38e-08 3.09e-08 4.24e-08 9.58e-08 1.02e-07 1.56e-07 erg/cm2
Peak flux CPL 1.52e+00 1.06e+00 1.94e-01 6.06e-03 2.79e+00 2.79e+00 ph/cm2/s
90%_error_low -4.75e-01 -3.09e-01 -1.94e-01 -6.06e-03 -5.96e-01 -5.96e-01 ph/cm2/s
90%_error_hi 4.73e-01 3.15e-01 1.01e-01 1.33e-02 5.96e-01 5.96e-01 ph/cm2/s
======================================================================
Special notes of this burst