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: Tue May 5 17:33:51 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger637044
======================================================================
Trigger: 00637044 Segment: 000
BAT Trigger Time: 449790870.208 [s; MET]
Trigger Stop: 449790871.232 [s; MET]
UTC: 2015-04-03T21:54:16.809780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 311.504549158767 Dec: -62.7015671965277 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 21.08
Image Trigger?: NO
Rate S/N Ratio: 77.9037868142493 [ if not an image trigger ]
Image S/N Ratio: 21.08
Analysis Position: [ source = BAT ]
RA: 311.504549158767 Dec: -62.7015671965277 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 311.504839868003 Dec: -62.7061118444366 [deg; J2000]
{ 20h 46m 01.2s , -62d 42' 22.0" }
+/- 0.706963406713824 [arcmin] (estimated 90% radius based on SNR)
+/- 0.183330360496723 [arcmin] (formal 1-sigma fit error)
SNR: 49.9189700292313
Angular difference between the analysis and refined position is 0.272796 arcmin
Partial Coding Fraction: 0.4023438 [ including projection effects ]
Duration
T90: 37.2959999442101 +/- 11.7165546057665
Measured from: -7.66000002622604
to: 29.635999917984 [s; relative to TRIGTIME]
T50: 8.90399992465973 +/- 0.515875925006412
Measured from: 2.29199999570847
to: 11.1959999203682 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.80400002002716
to: 6.80400002002716 [s; relative to TRIGTIME]
Total Fluence
Measured from: -83.1480000019073
to: 145.371999979019 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 5.153050 8.338450 8.142996 2.624169
0.133262 0.136869 0.123169 0.102599 [error]
Peak 0.348283 0.707570 0.844538 0.317785
0.017468 0.022496 0.024431 0.019397 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 228.520 -83.148 145.372
T90 37.296 -7.660 29.636
T50 8.904 2.292 11.196
Peak 1.000 5.804 6.804
====== 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 -1.221 -0.038 0.038 - - - 7.40e-03 -1.52e-04 1.51e-04 39.870 57
CPL -1.097 -0.137 0.154 444.655 -232.028 -444.655 8.32e-03 -7.06e-04 1.27e-03 37.880 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 -0.918 -0.060 0.060 - - - 1.53e-01 -5.22e-03 5.21e-03 50.960 57
CPL -0.746 -0.196 0.237 432.987 -432.987 -432.987 1.82e-01 -3.06e-02 4.69e-02 49.280 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 1.66e-06 3.63e-06 6.22e-06 2.47e-05 1.71e-05 3.62e-05 erg/cm2
90%_error_low -7.49e-08 -9.60e-08 -1.34e-07 -1.26e-06 -3.45e-07 -1.30e-06 erg/cm2
90%_error_hi 7.64e-08 9.58e-08 1.34e-07 1.31e-06 3.45e-07 1.34e-06 erg/cm2
Peak flux PL 1.38e-03 1.68e-02 2.16e-01 1.88e+01 9.80e-01 1.87e+01 ph/cm2/s
90%_error_low N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_hi N/A N/A N/A N/A N/A N/A ph/cm2/s
Fluence CPL 1.60e-06 3.64e-06 6.31e-06 2.13e-05 1.70e-05 3.28e-05 erg/cm2
90%_error_low -1.03e-07 -9.78e-08 -1.62e-07 -3.41e-06 -3.64e-07 -3.39e-06 erg/cm2
90%_error_hi 1.00e-07 9.80e-08 1.67e-07 3.66e-06 3.63e-07 3.03e-06 erg/cm2
Peak flux CPL 3.45e+00 5.20e+00 5.59e+00 9.00e+00 1.75e+01 2.32e+01 ph/cm2/s
90%_error_low -3.31e-01 -2.32e-01 -2.45e-01 -1.82e+00 -6.20e-01 -1.92e+00 ph/cm2/s
90%_error_hi 3.09e-01 2.33e-01 2.52e-01 1.98e+00 6.20e-01 2.14e+00 ph/cm2/s
======================================================================
Special notes of this burst