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 01:57:16 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger311874
======================================================================
Trigger: 00311874 Segment: 000
BAT Trigger Time: 232752174.784 [s; MET]
Trigger Stop: 232752182.976 [s; MET]
UTC: 2008-05-17T21:22:51.986120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 102.254712634596 Dec: 50.7307421877239 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.81
Image Trigger?: NO
Rate S/N Ratio: 11.8321595661992 [ if not an image trigger ]
Image S/N Ratio: 9.81
Analysis Position: [ source = BAT ]
RA: 102.254712634596 Dec: 50.7307421877239 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 102.278442458184 Dec: 50.7460113143002 [deg; J2000]
{ 06h 49m 06.8s , +50d 44' 45.6" }
+/- 2.30377997269376 [arcmin] (estimated 90% radius based on SNR)
+/- 1.35506563531954 [arcmin] (formal 1-sigma fit error)
SNR: 9.23305717576612
Angular difference between the analysis and refined position is 1.285006 arcmin
Partial Coding Fraction: 0.5 [ including projection effects ]
Duration
T90: 64.5079999864101 +/- 22.3013869451639
Measured from: 0.543999999761581
to: 65.0519999861717 [s; relative to TRIGTIME]
T50: 25.5960000157356 +/- 18.8237293691574
Measured from: 4.53999999165535
to: 30.136000007391 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.88400000333786
to: 4.88400000333786 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.763999998569489
to: 68.3879999816418 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.244035 0.314499 0.306645 0.076972
0.055703 0.058259 0.052203 0.047391 [error]
Peak 0.022649 0.031192 0.016279 0.003404
0.007024 0.007344 0.006567 0.005729 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 69.152 -0.764 68.388
T90 64.508 0.544 65.052
T50 25.596 4.540 30.136
Peak 1.000 3.884 4.884
====== 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 -1.428 -0.320 0.317 - - - 8.83e-04 -1.67e-04 1.66e-04 54.310 57
CPL -0.817 -0.887 1.735 94.566 -41.190 -94.566 1.82e-03 -1.12e-03 1.16e-02 53.670 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 -1.776 -0.505 0.461 - - - 4.37e-03 -1.50e-03 1.46e-03 67.090 57
CPL 0.724 -2.431 8.127 41.402 -7.208 88.945 1.47e-01 -1.47e-01 2.31e+04 64.020 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 7.28e-08 1.40e-07 2.08e-07 6.66e-07 5.87e-07 1.09e-06 erg/cm2
90%_error_low -2.16e-08 -2.71e-08 -5.06e-08 -2.87e-07 -1.22e-07 -3.37e-07 erg/cm2
90%_error_hi 2.33e-08 2.67e-08 5.03e-08 4.09e-07 1.25e-07 4.38e-07 erg/cm2
Peak flux PL 2.34e-01 2.00e-01 1.17e-01 1.02e-01 5.96e-01 6.54e-01 ph/cm2/s
90%_error_low -9.01e-02 -5.84e-02 -4.90e-02 -6.26e-02 -1.74e-01 -1.94e-01 ph/cm2/s
90%_error_hi 9.65e-02 5.84e-02 5.15e-02 1.04e-01 1.74e-01 1.98e-01 ph/cm2/s
Fluence CPL 6.64e-08 1.50e-07 2.14e-07 2.74e-07 5.57e-07 7.04e-07 erg/cm2
90%_error_low -2.64e-08 -3.33e-08 -5.55e-08 -2.23e-07 -1.36e-07 -2.67e-07 erg/cm2
90%_error_hi 2.67e-08 3.58e-08 5.66e-08 6.62e-07 1.39e-07 5.25e-07 erg/cm2
Peak flux CPL 1.97e-01 2.72e-01 8.66e-02 3.31e-03 5.59e-01 5.60e-01 ph/cm2/s
90%_error_low -1.06e-01 -9.26e-02 -8.66e-02 -3.31e-03 -1.71e-01 -1.71e-01 ph/cm2/s
90%_error_hi 1.08e-01 1.03e-01 7.84e-02 8.94e-02 1.74e-01 1.77e-01 ph/cm2/s
======================================================================
Special notes of this burst