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 07:11:24 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger291728
======================================================================
Trigger: 00291728 Segment: 000
BAT Trigger Time: 212015074.624 [s; MET]
Trigger Stop: 212015075.648 [s; MET]
UTC: 2007-09-20T21:04:32.386340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 0.144108470626363 Dec: -34.8186092179982 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.94
Image Trigger?: NO
Rate S/N Ratio: 14.1067359796659 [ if not an image trigger ]
Image S/N Ratio: 7.94
Analysis Position: [ source = BAT ]
RA: 0.144108470626363 Dec: -34.8186092179982 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 0.118000545972279 Dec: -34.8455819705286 [deg; J2000]
{ 00h 00m 28.3s , -34d 50' 44.1" }
+/- 0.98829579186739 [arcmin] (estimated 90% radius based on SNR)
+/- 0.410696724987387 [arcmin] (formal 1-sigma fit error)
SNR: 30.9330499324815
Angular difference between the analysis and refined position is 2.066981 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 22.2560000121593 +/- 2.79212104121582
Measured from: -11.2080000042915
to: 11.0480000078678 [s; relative to TRIGTIME]
T50: 9.41200000047684 +/- 1.20058650862768
Measured from: -4.55200001597404
to: 4.85999998450279 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -1.04399999976158
to: -0.0439999997615814 [s; relative to TRIGTIME]
Total Fluence
Measured from: -14.1200000047684
to: 13.3519999980927 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.491465 0.679196 0.279561 0.050297
0.024552 0.025822 0.022343 0.019248 [error]
Peak 0.031941 0.044404 0.020418 0.008319
0.004850 0.005180 0.004418 0.003793 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 27.472 -14.120 13.352
T90 22.256 -11.208 11.048
T50 9.412 -4.552 4.860
Peak 1.000 -1.044 -0.044
====== 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: 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 -1.875 -0.094 0.092 - - - 3.21e-03 -1.92e-04 1.90e-04 79.010 57
CPL -0.385 -0.541 0.625 44.717 -3.813 5.192 2.29e-02 -1.17e-02 2.98e-02 51.000 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 -1.667 -0.258 0.250 - - - 6.40e-03 -1.01e-03 9.83e-04 54.510 57
CPL -1.675 -0.251 0.269 9999.270 -9999.260 -9999.270 6.36e-03 -9.77e-04 7.63e-03 54.520 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 1.60e-07 2.35e-07 2.56e-07 5.23e-07 8.11e-07 1.17e-06 erg/cm2
90%_error_low -1.23e-08 -1.20e-08 -2.07e-08 -8.05e-08 -4.81e-08 -1.02e-07 erg/cm2
90%_error_hi 1.25e-08 1.20e-08 2.08e-08 8.99e-08 4.86e-08 1.10e-07 erg/cm2
Peak flux PL 3.09e-01 2.82e-01 1.77e-01 1.71e-01 8.40e-01 9.39e-01 ph/cm2/s
90%_error_low -6.45e-02 -3.83e-02 -3.67e-02 -6.12e-02 -1.13e-01 -1.32e-01 ph/cm2/s
90%_error_hi 6.66e-02 3.83e-02 3.68e-02 8.04e-02 1.13e-01 1.33e-01 ph/cm2/s
Fluence CPL 1.39e-07 2.72e-07 2.31e-07 6.69e-08 6.95e-07 7.08e-07 erg/cm2
90%_error_low -1.45e-08 -1.76e-08 -2.93e-08 -3.28e-08 -5.41e-08 -6.25e-08 erg/cm2
90%_error_hi 1.46e-08 1.79e-08 2.77e-08 5.88e-08 5.75e-08 7.96e-08 erg/cm2
Peak flux CPL 3.13e-01 2.77e-01 1.77e-01 1.70e-01 8.44e-01 9.65e-01 ph/cm2/s
90%_error_low -8.04e-02 -4.07e-02 -4.27e-02 N/A -1.39e-01 -2.02e-01 ph/cm2/s
90%_error_hi 7.57e-02 5.36e-02 4.41e-02 N/A 1.31e-01 1.22e-01 ph/cm2/s
======================================================================
Special notes of this burst