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.
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BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time: Mon Nov 16 01:18:01 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger661253
======================================================================
Trigger: 00661253 Segment: 000
BAT Trigger Time: 467300600.128 [s; MET]
Trigger Stop: 467300601.152 [s; MET]
UTC: 2015-10-23T13:43:04.815600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 271.019585617029 Dec: -8.3228306705058 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.49
Image Trigger?: NO
Rate S/N Ratio: 16.7332005306815 [ if not an image trigger ]
Image S/N Ratio: 8.49
Analysis Position: [ source = BAT ]
RA: 271.019585617029 Dec: -8.3228306705058 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 271.012509797461 Dec: -8.29311895355627 [deg; J2000]
{ 18h 04m 03.0s , -08d 17' 35.2" }
+/- 1.73990935619316 [arcmin] (estimated 90% radius based on SNR)
+/- 0.676165626112087 [arcmin] (formal 1-sigma fit error)
SNR: 13.788242656085
Angular difference between the analysis and refined position is 1.831532 arcmin
Partial Coding Fraction: 0.8359375 [ including projection effects ]
Duration
T90: 10.7599999308586 +/- 4.3722653107991
Measured from: -0.527999997138977
to: 10.2319999337196 [s; relative to TRIGTIME]
T50: 3.23599994182587 +/- 1.22536527753205
Measured from: 0.451999962329865
to: 3.68799990415573 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.236000001430511
to: 1.23600000143051 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.984000027179718
to: 12.1639999747276 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.222541 0.230564 0.085569 0.008733
0.023553 0.021281 0.017556 0.015000 [error]
Peak 0.054572 0.042738 0.024318 0.009152
0.007010 0.006359 0.005290 0.004138 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 13.148 -0.984 12.164
T90 10.760 -0.528 10.232
T50 3.236 0.452 3.688
Peak 1.000 0.236 1.236
====== 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 -2.254 -0.239 0.222 - - - 2.13e-03 -3.46e-04 3.39e-04 56.250 57
CPL -1.363 -0.789 1.282 27.306 N/A N/A 7.40e-03 N/A N/A 53.990 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 -2.040 -0.346 0.317 - - - 6.82e-03 -1.42e-03 1.34e-03 58.480 57
CPL -2.062 -0.519 0.200 29.925 N/A N/A 6.14e-03 N/A N/A 58.000 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 7.30e-08 8.51e-08 7.14e-08 1.01e-07 2.66e-07 3.31e-07 erg/cm2
90%_error_low -1.10e-08 -1.00e-08 -1.55e-08 -3.70e-08 -3.58e-08 -5.83e-08 erg/cm2
90%_error_hi 1.13e-08 9.95e-09 1.62e-08 4.96e-08 3.68e-08 6.75e-08 erg/cm2
Peak flux PL 4.73e-01 3.46e-01 1.68e-01 1.16e-01 1.04e+00 1.10e+00 ph/cm2/s
90%_error_low -1.08e-01 -5.16e-02 -4.63e-02 -5.27e-02 -1.56e-01 -1.65e-01 ph/cm2/s
90%_error_hi 1.13e-01 5.16e-02 4.71e-02 7.53e-02 1.56e-01 1.65e-01 ph/cm2/s
Fluence CPL 6.90e-08 9.35e-08 6.40e-08 2.25e-08 2.43e-07 2.49e-07 erg/cm2
90%_error_low -1.24e-08 N/A -2.09e-08 -1.85e-08 -3.83e-08 -4.38e-08 erg/cm2
90%_error_hi 1.23e-08 N/A 1.95e-08 7.83e-08 4.37e-08 9.23e-08 erg/cm2
Peak flux CPL 4.48e-01 2.54e-01 1.52e-01 1.21e-01 9.66e-01 1.04e+00 ph/cm2/s
90%_error_low -1.13e-01 -1.34e-01 N/A -1.21e-01 N/A -4.93e-01 ph/cm2/s
90%_error_hi 1.60e-01 1.19e-01 N/A 3.01e-02 N/A 1.41e-01 ph/cm2/s
======================================================================
Special notes of this burst