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 09:32:02 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger279898
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Trigger: 00279898 Segment: 000
BAT Trigger Time: 201375895.232 [s; MET]
Trigger Stop: 201375899.328 [s; MET]
UTC: 2007-05-20T17:44:53.264200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 121.951513642403 Dec: 57.6167755712018 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.32
Image Trigger?: NO
Rate S/N Ratio: 10 [ if not an image trigger ]
Image S/N Ratio: 7.32
Analysis Position: [ source = BAT ]
RA: 121.951513642403 Dec: 57.6167755712018 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 121.884543601363 Dec: 57.6040422374475 [deg; J2000]
{ 08h 07m 32.3s , +57d 36' 14.6" }
+/- 2.05374278052933 [arcmin] (estimated 90% radius based on SNR)
+/- 0.827842339031581 [arcmin] (formal 1-sigma fit error)
SNR: 10.87987794157
Angular difference between the analysis and refined position is 2.284012 arcmin
Partial Coding Fraction: 0.59375 [ including projection effects ]
Duration
T90: 96 +/- 35.7770876399966
Measured from: -15.2319999933243
to: 80.7680000066757 [s; relative to TRIGTIME]
T50: 48 +/- 16
Measured from: 0.76800000667572
to: 48.7680000066757 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.26800000667572
to: 9.26800000667572 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.2319999933243
to: 96.7680000066757 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.338528 0.460883 0.520753 0.164677
0.055549 0.058019 0.051689 0.044368 [error]
Peak -0.000480 0.017660 0.012065 0.003589
0.005980 0.006183 0.005571 0.004629 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
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====== Table of the duration information =============================
Value tstart tstop
T100 112.000 -15.232 96.768
T90 96.000 -15.232 80.768
T50 48.000 0.768 48.768
Peak 1.000 8.268 9.268
====== 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 -1.130 -0.206 0.212 - - - 9.24e-04 -1.03e-04 1.02e-04 70.650 57
CPL -1.123 -0.210 0.212 9999.300 -9999.300 -9999.300 9.29e-04 -1.02e-04 5.54e-04 70.670 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: N/A)
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 -0.871 -0.853 1.239 - - - 2.34e-03 -2.34e-03 1.23e-03 39.430 57
CPL -0.650 2.904 5.296 340.158 N/A N/A 2.97e-03 N/A N/A 39.420 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 9.36e-08 2.16e-07 3.95e-07 1.72e-06 1.07e-06 2.42e-06 erg/cm2
90%_error_low -2.12e-08 -2.97e-08 -5.06e-08 -4.66e-07 -1.28e-07 -4.97e-07 erg/cm2
90%_error_hi 2.28e-08 2.89e-08 4.97e-08 5.84e-07 1.29e-07 5.98e-07 erg/cm2
Peak flux PL 5.30e-02 7.77e-02 8.50e-02 1.74e-01 2.69e-01 3.90e-01 ph/cm2/s
90%_error_low -5.30e-02 -5.58e-02 -4.26e-02 -1.74e-01 -1.41e-01 -1.96e-01 ph/cm2/s
90%_error_hi 7.16e-02 5.39e-02 4.20e-02 3.26e-01 1.45e-01 2.47e-01 ph/cm2/s
Fluence CPL 9.35e-08 2.14e-07 3.88e-07 1.73e-06 1.08e-06 2.29e-06 erg/cm2
90%_error_low N/A -3.93e-08 -6.40e-08 -8.63e-07 -1.81e-07 -7.18e-07 erg/cm2
90%_error_hi N/A 4.12e-08 7.74e-08 5.78e-07 1.73e-07 7.11e-07 erg/cm2
Peak flux CPL 5.04e-02 7.91e-02 8.74e-02 1.36e-01 2.68e-01 3.53e-01 ph/cm2/s
90%_error_low -5.04e-02 -5.67e-02 -4.50e-02 -1.36e-01 -1.39e-01 -2.20e-01 ph/cm2/s
90%_error_hi 7.36e-02 6.90e-02 5.66e-02 2.18e-01 1.46e-01 2.37e-01 ph/cm2/s
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