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: Wed Jan 22 19:00:01 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger176818
======================================================================
Trigger: 00176818 Segment: 000
BAT Trigger Time: 158646187.072 [s; MET]
Trigger Stop: 158646187.584 [s; MET]
UTC: 2006-01-11T04:23:06.123420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 276.212529459245 Dec: 37.6021981979871 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.47
Image Trigger?: NO
Rate S/N Ratio: 13.490737563232 [ if not an image trigger ]
Image S/N Ratio: 7.47
Analysis Position: [ source = BAT ]
RA: 276.212529459245 Dec: 37.6021981979871 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 276.195122916218 Dec: 37.6025187890992 [deg; J2000]
{ 18h 24m 46.8s , +37d 36' 09.1" }
+/- 0.745420441804269 [arcmin] (estimated 90% radius based on SNR)
+/- 0.175819634076369 [arcmin] (formal 1-sigma fit error)
SNR: 46.2809472804975
Angular difference between the analysis and refined position is 0.827659 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 13.2120000123978 +/- 1.16562085145432
Measured from: 0.416000008583069
to: 13.6280000209808 [s; relative to TRIGTIME]
T50: 5.8759999871254 +/- 0.370621123835605
Measured from: 3.09600001573563
to: 8.97200000286102 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.3120000064373
to: 5.3120000064373 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.65200001001358
to: 17.5760000050068 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.580907 0.862868 0.572613 0.085311
0.022678 0.024311 0.021082 0.017420 [error]
Peak 0.047394 0.088599 0.067138 0.015762
0.005592 0.006138 0.005385 0.004256 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 18.228 -0.652 17.576
T90 13.212 0.416 13.628
T50 5.876 3.096 8.972
Peak 1.000 4.312 5.312
====== 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 -1.621 -0.065 0.064 - - - 7.50e-03 -2.77e-04 2.77e-04 63.410 57
CPL -0.882 -0.283 0.302 73.880 -9.112 16.935 1.78e-02 -4.91e-03 7.38e-03 41.340 56
=== 1-s peak 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 -1.375 -0.130 0.130 - - - 1.46e-02 -1.16e-03 1.16e-03 53.850 57
CPL -0.522 -0.570 0.662 86.007 -18.969 71.903 3.96e-02 -1.90e-02 4.49e-02 46.900 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 1.96e-07 3.34e-07 4.34e-07 1.14e-06 1.28e-06 2.11e-06 erg/cm2
90%_error_low -1.21e-08 -1.26e-08 -2.11e-08 -1.15e-07 -5.02e-08 -1.32e-07 erg/cm2
90%_error_hi 1.23e-08 1.26e-08 2.11e-08 1.23e-07 5.04e-08 1.38e-07 erg/cm2
Peak flux PL 5.32e-01 5.77e-01 4.44e-01 5.61e-01 1.76e+00 2.11e+00 ph/cm2/s
90%_error_low -7.01e-02 -4.90e-02 -4.34e-02 -1.03e-01 -1.40e-01 -1.72e-01 ph/cm2/s
90%_error_hi 7.28e-02 4.87e-02 4.31e-02 1.17e-01 1.40e-01 1.74e-01 ph/cm2/s
Fluence CPL 1.72e-07 3.57e-07 4.46e-07 4.22e-07 1.20e-06 1.40e-06 erg/cm2
90%_error_low -1.45e-08 -1.53e-08 -2.33e-08 -1.18e-07 -5.76e-08 -1.31e-07 erg/cm2
90%_error_hi 1.48e-08 1.55e-08 2.34e-08 1.72e-07 5.79e-08 1.78e-07 erg/cm2
Peak flux CPL 4.59e-01 6.26e-01 4.74e-01 2.34e-01 1.71e+00 1.79e+00 ph/cm2/s
90%_error_low -8.39e-02 -6.02e-02 -5.00e-02 -1.00e-01 -1.45e-01 -1.79e-01 ph/cm2/s
90%_error_hi 8.61e-02 6.21e-02 5.09e-02 1.76e-01 1.45e-01 2.14e-01 ph/cm2/s
======================================================================
Special notes of this burst