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: Sun Jan 12 05:10:55 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger550457
======================================================================
Trigger: 00550457 Segment: 000
BAT Trigger Time: 384306672 [s; MET]
Trigger Stop: 384306736 [s; MET]
UTC: 2013-03-06T23:51:01.706560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 279.477639697716 Dec: -11.6917684859571 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.36
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.36
Analysis Position: [ source = BAT ]
RA: 279.477639697716 Dec: -11.6917684859571 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 279.475149639958 Dec: -11.6816241692119 [deg; J2000]
{ 18h 37m 54.0s , -11d 40' 53.8" }
+/- 1.62865950573679 [arcmin] (estimated 90% radius based on SNR)
+/- 0.684056681955427 [arcmin] (formal 1-sigma fit error)
SNR: 15.1531760176516
Angular difference between the analysis and refined position is 0.625996 arcmin
Partial Coding Fraction: 0.1162109 [ including projection effects ]
Duration
T90: 272.379999935627 +/- 9.34031540434395
Measured from: -154.708000004292
to: 117.671999931335 [s; relative to TRIGTIME]
T50: 70.2719998955727 +/- 7.79203411923586
Measured from: -141.191999971867
to: -70.9200000762939 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -138.276000022888
to: -137.276000022888 [s; relative to TRIGTIME]
Total Fluence
Measured from: -159.472000002861
to: 154.175999999046 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 14.266416 17.432144 12.547985 2.448649
0.309672 0.314097 0.285550 0.281103 [error]
Peak 0.213427 0.266785 0.214018 0.069527
0.013930 0.014435 0.013186 0.010803 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 313.648 -159.472 154.176
T90 272.380 -154.708 117.672
T50 70.272 -141.192 -70.920
Peak 1.000 -138.276 -137.276
====== 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 -1.749 -0.049 0.049 - - - 1.03e-02 -2.53e-04 2.53e-04 43.030 57
CPL -1.558 -0.192 0.202 124.379 -37.967 3900.621 1.26e-02 -2.13e-03 2.95e-03 40.220 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 -1.573 -0.108 0.107 - - - 5.22e-02 -3.12e-03 3.11e-03 53.990 57
CPL -1.547 -0.134 0.309 893.635 -893.635 -893.635 5.38e-02 N/A N/A 54.090 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 5.20e-06 8.21e-06 9.77e-06 2.26e-05 2.97e-05 4.58e-05 erg/cm2
90%_error_low -2.53e-07 -2.27e-07 -3.15e-07 -1.63e-06 -7.49e-07 -1.80e-06 erg/cm2
90%_error_hi 2.59e-07 2.27e-07 3.14e-07 1.71e-06 7.50e-07 1.86e-06 erg/cm2
Peak flux PL 2.31e+00 2.22e+00 1.49e+00 1.57e+00 6.66e+00 7.59e+00 ph/cm2/s
90%_error_low -2.44e-01 -1.44e-01 -1.13e-01 -2.35e-01 -4.10e-01 -4.44e-01 ph/cm2/s
90%_error_hi 2.53e-01 1.43e-01 1.12e-01 2.59e-01 4.11e-01 4.44e-01 ph/cm2/s
Fluence CPL 4.96e-06 8.29e-06 9.89e-06 1.75e-05 2.93e-05 4.07e-05 erg/cm2
90%_error_low -3.38e-07 -2.42e-07 -3.40e-07 -3.85e-06 -8.73e-07 -3.99e-06 erg/cm2
90%_error_hi 3.46e-07 2.44e-07 3.43e-07 5.15e-06 8.69e-07 5.25e-06 erg/cm2
Peak flux CPL 2.33e+00 2.21e+00 1.48e+00 1.56e+00 6.68e+00 7.73e+00 ph/cm2/s
90%_error_low N/A -1.11e-01 -1.46e-01 N/A -5.55e-01 -1.02e+00 ph/cm2/s
90%_error_hi N/A 1.02e-01 1.74e-01 N/A 4.96e-01 4.88e-01 ph/cm2/s
======================================================================
Special notes of this burst