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: Sun May 17 23:59:36 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger639433
======================================================================
Trigger: 00639433 Segment: 000
BAT Trigger Time: 452046088.768 [s; MET]
Trigger Stop: 452046090.816 [s; MET]
UTC: 2015-04-30T00:21:15.254160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 326.490552682698 Dec: -27.9275457785092 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.21
Image Trigger?: NO
Rate S/N Ratio: 53.619026473818 [ if not an image trigger ]
Image S/N Ratio: 7.21
Analysis Position: [ source = BAT ]
RA: 326.490552682698 Dec: -27.9275457785092 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 326.478336224977 Dec: -27.9157234611205 [deg; J2000]
{ 21h 45m 54.8s , -27d 54' 56.6" }
+/- 1.53276330908951 [arcmin] (estimated 90% radius based on SNR)
+/- 0.635985090250733 [arcmin] (formal 1-sigma fit error)
SNR: 16.5254752244778
Angular difference between the analysis and refined position is 0.960534 arcmin
Partial Coding Fraction: 0.05761719 [ including projection effects ]
Duration
T90: 106.879999995232 +/- 7.02755263860171
Measured from: -8.02399998903275
to: 98.8560000061989 [s; relative to TRIGTIME]
T50: 45.6000000238419 +/- 12.1512600658553
Measured from: 0.0400000214576721
to: 45.6400000452995 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.972000002861023
to: 1.97200000286102 [s; relative to TRIGTIME]
Total Fluence
Measured from: -10.9359999895096
to: 108.695999979973 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.038652 3.303377 3.218708 0.971239
0.206399 0.222208 0.204792 0.170343 [error]
Peak 0.147112 0.161659 0.256416 0.068977
0.030220 0.039259 0.041162 0.029845 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 119.632 -10.936 108.696
T90 106.880 -8.024 98.856
T50 45.600 0.040 45.640
Peak 1.000 0.972 1.972
====== 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 -1.366 -0.117 0.118 - - - 5.78e-03 -3.95e-04 3.95e-04 48.090 57
CPL -1.035 -0.384 0.508 158.704 -65.316 -158.704 8.28e-03 -2.74e-03 5.83e-03 46.580 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 -1.181 -0.326 0.327 - - - 4.23e-02 -8.25e-03 8.23e-03 54.760 57
CPL -0.935 0.935 1.712 262.386 -262.386 -262.386 5.42e-02 -1.95e-02 2.14e-01 54.660 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 7.79e-07 1.55e-06 2.41e-06 8.22e-06 6.73e-06 1.30e-05 erg/cm2
90%_error_low -9.74e-08 -1.20e-07 -1.98e-07 -1.39e-06 -4.93e-07 -1.53e-06 erg/cm2
90%_error_hi 1.01e-07 1.20e-07 1.97e-07 1.57e-06 4.95e-07 1.67e-06 erg/cm2
Peak flux PL 1.28e+00 1.56e+00 1.38e+00 2.09e+00 4.96e+00 6.32e+00 ph/cm2/s
90%_error_low -4.49e-01 -3.69e-01 -3.01e-01 -8.21e-01 -1.00e+00 -1.26e+00 ph/cm2/s
90%_error_hi 5.08e-01 3.59e-01 2.94e-01 1.05e+00 1.01e+00 1.29e+00 ph/cm2/s
Fluence CPL 7.26e-07 1.60e-06 2.49e-06 5.31e-06 6.62e-06 1.01e-05 erg/cm2
90%_error_low -1.20e-07 -1.36e-07 -2.28e-07 -2.29e-06 -5.22e-07 -2.31e-06 erg/cm2
90%_error_hi 1.23e-07 1.39e-07 2.33e-07 3.40e-06 5.19e-07 3.48e-06 erg/cm2
Peak flux CPL 1.20e+00 1.59e+00 1.43e+00 1.70e+00 4.93e+00 5.92e+00 ph/cm2/s
90%_error_low -6.13e-01 -1.98e-01 -3.46e-01 -1.70e+00 -1.02e+00 -1.65e+00 ph/cm2/s
90%_error_hi 5.75e-01 3.99e-01 4.36e-01 1.38e+00 1.02e+00 1.65e+00 ph/cm2/s
======================================================================
Special notes of this burst