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: Sat Oct 4 21:02:44 EDT 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger609885
======================================================================
Trigger: 00609885 Segment: 000
BAT Trigger Time: 430080268.928 [s; MET]
Trigger Stop: 430080270.976 [s; MET]
UTC: 2014-08-18T18:44:16.515620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 271.147889570597 Dec: -1.36139902602599 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.63
Image Trigger?: NO
Rate S/N Ratio: 10.8627804912002 [ if not an image trigger ]
Image S/N Ratio: 7.63
Analysis Position: [ source = BAT ]
RA: 271.147889570597 Dec: -1.36139902602599 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 271.175117118492 Dec: -1.35598151488953 [deg; J2000]
{ 18h 04m 42.0s , -01d 21' 21.5" }
+/- 2.51630366791278 [arcmin] (estimated 90% radius based on SNR)
+/- 1.29646611011694 [arcmin] (formal 1-sigma fit error)
SNR: 8.13953764656927
Angular difference between the analysis and refined position is 1.665226 arcmin
Partial Coding Fraction: 0.3945312 [ including projection effects ]
Duration
T90: 31.5520000457764 +/- 16.0461414097757
Measured from: -2.87199997901917
to: 28.6800000667572 [s; relative to TRIGTIME]
T50: 9.60000002384186 +/- 5.56063881196498
Measured from: -0.824000000953674
to: 8.77600002288818 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.308000028133392
to: 1.30800002813339 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.31999999284744
to: 31.944000005722 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.360988 0.391968 0.258527 0.006326
0.062231 0.055280 0.045902 0.037637 [error]
Peak 0.032646 0.043252 0.039740 0.009858
0.010690 0.009967 0.008433 0.006533 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 35.264 -3.320 31.944
T90 31.552 -2.872 28.680
T50 9.600 -0.824 8.776
Peak 1.000 0.308 1.308
====== 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 -1.826 -0.281 0.271 - - - 2.00e-03 -3.31e-04 3.23e-04 43.800 57
CPL -1.757 -0.879 1.184 163.936 -163.849 -163.936 2.18e-03 -1.37e-03 7.18e-03 43.790 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 -1.622 -0.378 0.367 - - - 8.25e-03 -1.95e-03 1.94e-03 40.380 57
CPL -0.134 -1.529 2.214 66.591 -18.850 1144.879 4.25e-02 -4.25e-02 3.69e-01 37.640 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 1.23e-07 1.85e-07 2.08e-07 4.47e-07 6.50e-07 9.63e-07 erg/cm2
90%_error_low -2.88e-08 -2.80e-08 -4.59e-08 -1.75e-07 -1.07e-07 -2.24e-07 erg/cm2
90%_error_hi 3.04e-08 2.78e-08 4.59e-08 2.39e-07 1.08e-07 2.70e-07 erg/cm2
Peak flux PL 3.81e-01 3.57e-01 2.32e-01 2.33e-01 1.07e+00 1.20e+00 ph/cm2/s
90%_error_low -1.37e-01 -8.97e-02 -6.58e-02 -1.08e-01 -2.58e-01 -2.79e-01 ph/cm2/s
90%_error_hi 1.54e-01 8.86e-02 6.49e-02 1.48e-01 2.60e-01 2.79e-01 ph/cm2/s
Fluence CPL 1.22e-07 1.86e-07 2.09e-07 3.97e-07 6.46e-07 9.13e-07 erg/cm2
90%_error_low -3.30e-08 -2.92e-08 -4.62e-08 -3.20e-07 -1.22e-07 -3.54e-07 erg/cm2
90%_error_hi 3.23e-08 3.62e-08 4.76e-08 8.87e-08 1.11e-07 1.94e-07 erg/cm2
Peak flux CPL 2.76e-01 3.97e-01 2.70e-01 8.08e-02 1.00e+00 1.02e+00 ph/cm2/s
90%_error_low -1.59e-01 -1.07e-01 -8.12e-02 -8.08e-02 -2.64e-01 -2.75e-01 ph/cm2/s
90%_error_hi 1.85e-01 1.10e-01 8.55e-02 1.76e-01 2.68e-01 2.99e-01 ph/cm2/s
======================================================================
Special notes of this burst