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 01:12:19 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger661775
======================================================================
Trigger: 00661775 Segment: 000
BAT Trigger Time: 467611119.488 [s; MET]
Trigger Stop: 467611120 [s; MET]
UTC: 2015-10-27T03:58:24.159080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 272.491599210451 Dec: 61.3808915516615 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.26
Image Trigger?: NO
Rate S/N Ratio: 29.1547594742265 [ if not an image trigger ]
Image S/N Ratio: 9.26
Analysis Position: [ source = BAT ]
RA: 272.491599210451 Dec: 61.3808915516615 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 272.497099805801 Dec: 61.361485467605 [deg; J2000]
{ 18h 09m 59.3s , +61d 21' 41.3" }
+/- 1.11530241647316 [arcmin] (estimated 90% radius based on SNR)
+/- 0.387175104164844 [arcmin] (formal 1-sigma fit error)
SNR: 26.026430195124
Angular difference between the analysis and refined position is 1.175054 arcmin
Partial Coding Fraction: 0.1894531 [ including projection effects ]
Duration
T90: 129.579999983311 +/- 5.46544933158177
Measured from: 0.65200001001358
to: 130.231999993324 [s; relative to TRIGTIME]
T50: 94.7759999036789 +/- 6.78514874748248
Measured from: 18.7880000472069
to: 113.563999950886 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.203999996185303
to: 1.2039999961853 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.739999949932098
to: 164.703999996185 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.220600 4.316379 3.316776 0.961016
0.099364 0.103021 0.090164 0.076072 [error]
Peak 0.161582 0.261932 0.284104 0.118131
0.017708 0.020564 0.020381 0.015645 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 165.444 -0.740 164.704
T90 129.580 0.652 130.232
T50 94.776 18.788 113.564
Peak 1.000 0.204 1.204
====== 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 -1.542 -0.056 0.056 - - - 4.71e-03 -1.36e-04 1.36e-04 45.940 57
CPL -1.550 -0.050 0.070 9999.360 -9999.360 -9999.360 4.68e-03 -8.76e-05 8.33e-04 46.380 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 -1.240 -0.134 0.136 - - - 5.80e-02 -4.53e-03 4.52e-03 49.730 57
CPL -1.235 -0.135 0.520 9984.670 -9984.670 -9984.670 5.83e-02 -4.50e-03 3.90e-02 49.730 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 1.03e-06 1.84e-06 2.53e-06 7.20e-06 7.29e-06 1.26e-05 erg/cm2
90%_error_low -5.94e-08 -6.16e-08 -9.18e-08 -5.85e-07 -2.22e-07 -6.36e-07 erg/cm2
90%_error_hi 6.07e-08 6.13e-08 9.16e-08 6.20e-07 2.22e-07 6.64e-07 erg/cm2
Peak flux PL 1.86e+00 2.19e+00 1.85e+00 2.66e+00 6.85e+00 8.56e+00 ph/cm2/s
90%_error_low -2.86e-01 -2.12e-01 -1.58e-01 -4.55e-01 -5.69e-01 -6.71e-01 ph/cm2/s
90%_error_hi 3.02e-01 2.10e-01 1.57e-01 5.08e-01 5.72e-01 6.74e-01 ph/cm2/s
Fluence CPL 9.51e-07 1.25e-06 1.25e-06 2.80e-06 4.23e-06 6.23e-06 erg/cm2
90%_error_low -7.76e-08 -9.57e-08 -1.00e-07 -3.22e-07 -3.47e-07 -4.59e-07 erg/cm2
90%_error_hi 5.78e-08 6.10e-08 1.19e-07 2.81e-07 3.36e-07 5.68e-07 erg/cm2
Peak flux CPL 1.86e+00 2.19e+00 1.85e+00 2.65e+00 6.85e+00 8.55e+00 ph/cm2/s
90%_error_low -2.91e-01 -1.99e-01 -1.44e-01 -1.01e+00 -5.69e-01 -1.20e+00 ph/cm2/s
90%_error_hi 3.24e-01 2.21e-01 2.02e-01 5.04e-01 5.71e-01 6.62e-01 ph/cm2/s
======================================================================
Special notes of this burst