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.
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BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time: Mon Jan 20 03:03:15 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger308812
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Trigger: 00308812 Segment: 000
BAT Trigger Time: 229396980.288 [s; MET]
Trigger Stop: 229396980.8 [s; MET]
UTC: 2008-04-09T01:22:57.584260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 84.3330381966349 Dec: 5.08532726901622 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.13
Image Trigger?: NO
Rate S/N Ratio: 19.8494332412792 [ if not an image trigger ]
Image S/N Ratio: 14.13
Analysis Position: [ source = BAT ]
RA: 84.3330381966349 Dec: 5.08532726901622 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 84.3026982829364 Dec: 5.07703010304101 [deg; J2000]
{ 05h 37m 12.6s , +05d 04' 37.3" }
+/- 1.66763342005151 [arcmin] (estimated 90% radius based on SNR)
+/- 0.650944039324461 [arcmin] (formal 1-sigma fit error)
SNR: 14.6498042893627
Angular difference between the analysis and refined position is 1.880340 arcmin
Partial Coding Fraction: 0.4609375 [ including projection effects ]
Duration
T90: 22.6560000181198 +/- 7.53424395861518
Measured from: -12.7639999985695
to: 9.89200001955032 [s; relative to TRIGTIME]
T50: 2.88400000333786 +/- 5.70394108221307
Measured from: 0.200000017881393
to: 3.08400002121925 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0
to: 1 [s; relative to TRIGTIME]
Total Fluence
Measured from: -13.0999999940395
to: 10.4120000004768 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.387665 0.450530 0.222860 -0.015097
0.037433 0.039123 0.033646 0.029371 [error]
Peak 0.094767 0.168262 0.131085 0.022228
0.009536 0.010452 0.008980 0.006704 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 23.512 -13.100 10.412
T90 22.656 -12.764 9.892
T50 2.884 0.200 3.084
Peak 1.000 0.000 1.000
====== 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 -2.037 -0.190 0.180 - - - 2.87e-03 -3.70e-04 3.63e-04 60.120 57
CPL -0.691 -0.900 1.120 40.335 -9.088 9.597 1.72e-02 -1.72e-02 5.98e-02 53.010 56
=== 1-s peak 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 -1.523 -0.112 0.112 - - - 2.94e-02 -2.11e-03 2.10e-03 75.610 57
CPL -0.548 -0.492 0.550 75.186 -11.919 27.182 9.13e-02 -3.90e-02 7.87e-02 63.030 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 1.43e-07 1.90e-07 1.85e-07 3.22e-07 6.24e-07 8.40e-07 erg/cm2
90%_error_low -2.01e-08 -1.96e-08 -3.17e-08 -9.65e-08 -7.45e-08 -1.37e-07 erg/cm2
90%_error_hi 2.06e-08 1.96e-08 3.23e-08 1.20e-07 7.57e-08 1.54e-07 erg/cm2
Peak flux PL 1.24e+00 1.23e+00 8.55e-01 9.40e-01 3.70e+00 4.26e+00 ph/cm2/s
90%_error_low -1.45e-01 -9.43e-02 -7.32e-02 -1.50e-01 -2.70e-01 -3.02e-01 ph/cm2/s
90%_error_hi 1.49e-01 9.38e-02 7.28e-02 1.65e-01 2.71e-01 3.02e-01 ph/cm2/s
Fluence CPL 1.27e-07 2.21e-07 1.73e-07 5.19e-08 5.61e-07 5.73e-07 erg/cm2
90%_error_low -2.36e-08 -2.80e-08 -4.13e-08 -3.67e-08 -7.58e-08 -8.46e-08 erg/cm2
90%_error_hi 2.36e-08 2.89e-08 3.92e-08 1.07e-07 8.20e-08 1.28e-07 erg/cm2
Peak flux CPL 1.04e+00 1.35e+00 9.35e-01 3.85e-01 3.59e+00 3.71e+00 ph/cm2/s
90%_error_low -1.70e-01 -1.15e-01 -8.73e-02 -1.35e-01 -2.76e-01 -3.10e-01 ph/cm2/s
90%_error_hi 1.75e-01 1.18e-01 8.87e-02 2.04e-01 2.76e-01 3.28e-01 ph/cm2/s
======================================================================