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 13 22:36:57 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger451901
======================================================================
Trigger: 00451901 Segment: 000
BAT Trigger Time: 325179722.752 [s; MET]
Trigger Stop: 325179722.88 [s; MET]
UTC: 2011-04-22T15:41:55.870640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 111.994986280231 Dec: 75.1057497440089 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.19
Image Trigger?: NO
Rate S/N Ratio: 27.9463772249642 [ if not an image trigger ]
Image S/N Ratio: 7.19
Analysis Position: [ source = BAT ]
RA: 111.994986280231 Dec: 75.1057497440089 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 112.054744672371 Dec: 75.1000434192061 [deg; J2000]
{ 07h 28m 13.1s , +75d 06' 00.2" }
+/- 0.651622034702634 [arcmin] (estimated 90% radius based on SNR)
+/- 0.284183816267759 [arcmin] (formal 1-sigma fit error)
SNR: 56.083966410047
Angular difference between the analysis and refined position is 0.983307 arcmin
Partial Coding Fraction: 0.2265625 [ including projection effects ]
Duration
T90: 25.7839999198914 +/- 0.595449441244896
Measured from: -5.60399997234344
to: 20.1799999475479 [s; relative to TRIGTIME]
T50: 10.9319999217987 +/- 0.199719778713348
Measured from: 2.58000004291534
to: 13.5119999647141 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 6.90400004386902
to: 7.90400004386902 [s; relative to TRIGTIME]
Total Fluence
Measured from: -11.1559999585152
to: 36.7600000500679 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.998205 18.631905 18.505677 5.281088
0.122846 0.151919 0.149099 0.100399 [error]
Peak 0.499016 1.116053 1.337021 0.518001
0.024935 0.033911 0.038030 0.027883 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 47.916 -11.156 36.760
T90 25.784 -5.604 20.180
T50 10.932 2.580 13.512
Peak 1.000 6.904 7.904
====== 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: CPL)
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 -1.340 N/A N/A - - - 8.24e-02 N/A N/A 117.750 57
CPL -0.831 -0.105 0.107 147.995 -14.673 21.463 1.31e-01 -1.16e-02 1.29e-02 44.670 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 -0.969 -0.056 0.056 - - - 2.51e-01 -8.35e-03 8.33e-03 61.350 57
CPL -0.680 -0.223 0.234 276.948 -96.515 638.087 3.34e-01 -6.42e-02 8.32e-02 56.400 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 4.34e-06 8.80e-06 1.39e-05 4.87e-05 3.87e-05 7.58e-05 erg/cm2
90%_error_low N/A N/A N/A N/A N/A N/A erg/cm2
90%_error_hi N/A N/A N/A N/A N/A N/A erg/cm2
Peak flux PL 6.23e+00 8.61e+00 8.80e+00 1.64e+01 2.89e+01 4.00e+01 ph/cm2/s
90%_error_low -4.23e-01 -3.64e-01 -3.01e-01 -1.17e+00 -9.75e-01 -1.40e+00 ph/cm2/s
90%_error_hi 4.34e-01 3.62e-01 3.01e-01 1.23e+00 9.76e-01 1.42e+00 ph/cm2/s
Fluence CPL 3.66e-06 8.86e-06 1.49e-05 3.07e-05 3.83e-05 5.81e-05 erg/cm2
90%_error_low -1.75e-07 -1.71e-07 -2.69e-07 -2.56e-06 -5.26e-07 -2.56e-06 erg/cm2
90%_error_hi 1.78e-07 1.72e-07 2.70e-07 2.86e-06 5.25e-07 2.84e-06 erg/cm2
Peak flux CPL 5.73e+00 8.72e+00 9.16e+00 1.26e+01 2.86e+01 3.62e+01 ph/cm2/s
90%_error_low -5.47e-01 -3.81e-01 -4.03e-01 -2.25e+00 -9.93e-01 -2.46e+00 ph/cm2/s
90%_error_hi 5.63e-01 3.83e-01 4.06e-01 2.87e+00 9.94e-01 2.98e+00 ph/cm2/s
======================================================================
Special notes of this burst