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: Sun Jan 19 22:08:14 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger331093
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Trigger: 00331093 Segment: 000
BAT Trigger Time: 245188692.544 [s; MET]
Trigger Stop: 245188694.592 [s; MET]
UTC: 2008-10-08T19:58:09.384500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 279.987257236876 Dec: -57.4643799585525 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10
Image Trigger?: NO
Rate S/N Ratio: 19.7737199332852 [ if not an image trigger ]
Image S/N Ratio: 10
Analysis Position: [ source = BAT ]
RA: 279.987257236876 Dec: -57.4643799585525 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 279.96819305153 Dec: -57.4375697162417 [deg; J2000]
{ 18h 39m 52.4s , -57d 26' 15.3" }
+/- 1.00331538982712 [arcmin] (estimated 90% radius based on SNR)
+/- 0.366707801772723 [arcmin] (formal 1-sigma fit error)
SNR: 30.2736541930644
Angular difference between the analysis and refined position is 1.722317 arcmin
Partial Coding Fraction: 0.8125 [ including projection effects ]
Duration
T90: 187.824000030756 +/- 38.2284553731243
Measured from: -43.3720000088215
to: 144.452000021935 [s; relative to TRIGTIME]
T50: 111.108000010252 +/- 1.9575658398699
Measured from: 1.50799998641014
to: 112.615999996662 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.52399998903275
to: 8.52399998903275 [s; relative to TRIGTIME]
Total Fluence
Measured from: -65.8880000114441
to: 195.912000000477 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.109706 2.870847 1.815992 0.425950
0.088334 0.085187 0.072912 0.063513 [error]
Peak 0.039011 0.057280 0.056434 0.007094
0.006321 0.006272 0.005615 0.004457 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 261.800 -65.888 195.912
T90 187.824 -43.372 144.452
T50 111.108 1.508 112.616
Peak 1.000 7.524 8.524
====== 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 -1.623 -0.071 0.071 - - - 1.74e-03 -6.70e-05 6.69e-05 49.250 57
CPL -1.349 -0.274 0.294 118.169 -37.230 1905.991 2.39e-03 -6.24e-04 9.34e-04 46.330 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 -1.343 -0.203 0.203 - - - 1.07e-02 -1.22e-03 1.22e-03 54.410 57
CPL -0.989 -0.458 0.844 152.830 -152.830 -152.830 1.58e-02 N/A N/A 53.730 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 6.54e-07 1.11e-06 1.45e-06 3.80e-06 4.25e-06 7.01e-06 erg/cm2
90%_error_low -4.46e-08 -4.48e-08 -7.37e-08 -4.11e-07 -1.74e-07 -4.64e-07 erg/cm2
90%_error_hi 4.56e-08 4.47e-08 7.36e-08 4.45e-07 1.75e-07 4.91e-07 erg/cm2
Peak flux PL 3.79e-01 4.19e-01 3.30e-01 4.29e-01 1.29e+00 1.56e+00 ph/cm2/s
90%_error_low -7.72e-02 -5.36e-02 -4.64e-02 -1.15e-01 -1.49e-01 -1.82e-01 ph/cm2/s
90%_error_hi 8.24e-02 5.29e-02 4.58e-02 1.39e-01 1.50e-01 1.85e-01 ph/cm2/s
Fluence CPL 6.21e-07 1.14e-06 1.46e-06 2.50e-06 4.15e-06 5.72e-06 erg/cm2
90%_error_low -5.43e-08 -5.17e-08 -7.73e-08 -8.13e-07 -2.04e-07 -8.38e-07 erg/cm2
90%_error_hi 5.53e-08 5.24e-08 7.80e-08 1.29e-06 2.03e-07 1.30e-06 erg/cm2
Peak flux CPL 3.50e-01 4.29e-01 3.42e-01 2.96e-01 1.26e+00 1.42e+00 ph/cm2/s
90%_error_low -9.61e-02 -5.81e-02 -5.20e-02 -1.55e-01 -1.57e-01 -2.35e-01 ph/cm2/s
90%_error_hi 9.96e-02 5.97e-02 5.38e-02 1.76e-01 1.57e-01 1.41e-01 ph/cm2/s
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