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 11:19:39 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger261880
======================================================================
Trigger: 00261880 Segment: 000
BAT Trigger Time: 194041680 [s; MET]
Trigger Stop: 194041744 [s; MET]
UTC: 2007-02-24T20:27:58.214180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 178.989686201408 Dec: -13.3399298580834 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.5
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.5
Analysis Position: [ source = BAT ]
RA: 178.989686201408 Dec: -13.3399298580834 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 178.99720195201 Dec: -13.373545725744 [deg; J2000]
{ 11h 55m 59.3s , -13d 22' 24.8" }
+/- 2.29129570710923 [arcmin] (estimated 90% radius based on SNR)
+/- 0.910543767147948 [arcmin] (formal 1-sigma fit error)
SNR: 9.30500796835042
Angular difference between the analysis and refined position is 2.064121 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 48 +/- 35.7770876399966
Measured from: -15
to: 33 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: -15
to: 1 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -7.5
to: -6.5 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15
to: 49 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.361915 0.289511 0.112186 0.027142
0.037197 0.038685 0.033804 0.030114 [error]
Peak 0.009983 0.014453 -0.004225 0.000578
0.004767 0.004912 0.004304 0.003772 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 64.000 -15.000 49.000
T90 48.000 -15.000 33.000
T50 16.000 -15.000 1.000
Peak 1.000 -7.500 -6.500
====== 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 -2.289 -0.300 0.270 - - - 6.05e-04 -1.32e-04 1.30e-04 61.380 57
CPL -1.510 -0.827 1.509 22.576 -19.385 14.938 1.89e-03 -1.08e-03 1.57e-02 60.220 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 -2.157 -1.223 0.757 - - - 1.22e-03 -8.85e-04 8.57e-04 51.040 57
CPL 3.008 -3.196 -3.008 32.226 -7.286 8.711 3.04e+00 -3.04e+00 2.16e+05 46.190 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 1.04e-07 1.19e-07 9.75e-08 1.34e-07 3.70e-07 4.55e-07 erg/cm2
90%_error_low -1.72e-08 -1.81e-08 -2.76e-08 -6.04e-08 -6.45e-08 -1.02e-07 erg/cm2
90%_error_hi 1.74e-08 1.77e-08 2.99e-08 8.81e-08 6.76e-08 1.24e-07 erg/cm2
Peak flux PL 9.72e-02 6.37e-02 2.71e-02 1.59e-02 1.96e-01 2.04e-01 ph/cm2/s
90%_error_low -5.77e-02 -3.72e-02 -2.71e-02 -1.59e-02 -1.07e-01 -1.13e-01 ph/cm2/s
90%_error_hi 6.14e-02 3.69e-02 2.90e-02 4.31e-02 1.08e-01 1.17e-01 ph/cm2/s
Fluence CPL 1.02e-07 1.30e-07 N/A 1.11e-07 3.38e-07 3.81e-07 erg/cm2
90%_error_low -1.87e-08 N/A -2.76e-08 -9.20e-08 -6.58e-08 -1.08e-07 erg/cm2
90%_error_hi 1.83e-08 N/A 2.99e-08 4.35e-07 8.11e-08 1.89e-07 erg/cm2
Peak flux CPL 7.66e-02 1.24e-01 7.39e-03 4.66e-07 2.08e-01 2.09e-01 ph/cm2/s
90%_error_low -5.41e-02 -6.00e-02 -7.39e-03 -4.66e-07 -9.39e-02 -9.47e-02 ph/cm2/s
90%_error_hi 7.20e-02 6.08e-02 2.77e-02 1.60e-03 9.82e-02 9.73e-02 ph/cm2/s
======================================================================
Special notes of this burst