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 09:52:50 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger278903
======================================================================
Trigger: 00278903 Segment: 000
BAT Trigger Time: 200371709.248 [s; MET]
Trigger Stop: 200371710.272 [s; MET]
UTC: 2007-05-09T02:48:27.305440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 237.926549002769 Dec: -78.6806906520622 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.66
Image Trigger?: NO
Rate S/N Ratio: 13.6014705087354 [ if not an image trigger ]
Image S/N Ratio: 8.66
Analysis Position: [ source = BAT ]
RA: 237.926549002769 Dec: -78.6806906520622 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 237.898683721382 Dec: -78.6530361224751 [deg; J2000]
{ 15h 51m 35.7s , -78d 39' 10.9" }
+/- 1.68055177092417 [arcmin] (estimated 90% radius based on SNR)
+/- 0.630720767832941 [arcmin] (formal 1-sigma fit error)
SNR: 14.4891945239721
Angular difference between the analysis and refined position is 1.691488 arcmin
Partial Coding Fraction: 0.9296875 [ including projection effects ]
Duration
T90: 7.82800000905991 +/- 1.16132337087018
Measured from: -1.05199998617172
to: 6.77600002288818 [s; relative to TRIGTIME]
T50: 3.53599998354912 +/- 1.10314461654296
Measured from: 0.0520000159740448
to: 3.58799999952316 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.30799999833107
to: 0.69200000166893 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.43199998140335
to: 7.86800000071526 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.175647 0.157118 0.062505 0.008759
0.015121 0.015196 0.012920 0.011052 [error]
Peak 0.023791 0.037870 0.022231 0.004316
0.005110 0.005290 0.004378 0.003679 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 9.300 -1.432 7.868
T90 7.828 -1.052 6.776
T50 3.536 0.052 3.588
Peak 1.000 -0.308 0.692
====== 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 -2.209 -0.235 0.218 - - - 2.14e-03 -3.51e-04 3.44e-04 54.850 57
CPL -1.955 -0.026 1.224 6.572 -6.159 -6.572 3.10e-03 N/A N/A 54.410 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 -1.593 -0.291 0.281 - - - 5.28e-03 -9.76e-04 9.61e-04 65.410 57
CPL -0.180 -1.277 1.851 61.173 -14.739 109.508 2.90e-02 -2.90e-02 2.31e-01 61.740 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 4.97e-08 5.95e-08 5.15e-08 7.61e-08 1.88e-07 2.37e-07 erg/cm2
90%_error_low -7.08e-09 -6.97e-09 -1.12e-08 -2.79e-08 -2.58e-08 -4.34e-08 erg/cm2
90%_error_hi 7.18e-09 6.88e-09 1.18e-08 3.75e-08 2.67e-08 5.09e-08 erg/cm2
Peak flux PL 2.37e-01 2.26e-01 1.50e-01 1.55e-01 6.76e-01 7.68e-01 ph/cm2/s
90%_error_low -6.12e-02 -3.98e-02 -3.47e-02 -6.05e-02 -1.16e-01 -1.34e-01 ph/cm2/s
90%_error_hi 6.52e-02 3.96e-02 3.47e-02 7.99e-02 1.17e-01 1.36e-01 ph/cm2/s
Fluence CPL 4.90e-08 6.19e-08 4.89e-08 3.60e-08 1.79e-07 1.96e-07 erg/cm2
90%_error_low N/A N/A -1.60e-08 -3.08e-08 -3.16e-08 N/A erg/cm2
90%_error_hi N/A N/A 1.34e-08 7.09e-08 3.15e-08 N/A erg/cm2
Peak flux CPL 1.90e-01 2.59e-01 1.61e-01 4.18e-02 6.43e-01 6.52e-01 ph/cm2/s
90%_error_low -7.56e-02 -5.05e-02 -4.15e-02 -4.18e-02 -1.21e-01 -1.28e-01 ph/cm2/s
90%_error_hi 7.83e-02 5.39e-02 4.17e-02 9.41e-02 1.21e-01 1.40e-01 ph/cm2/s
======================================================================
Special notes of this burst