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: Sun Jan 19 13:21:26 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger373871
======================================================================
Trigger: 00373871 Segment: 000
BAT Trigger Time: 278255495.36 [s; MET]
Trigger Stop: 278255496.384 [s; MET]
UTC: 2009-10-26T13:11:30.155080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 276.583106903892 Dec: -86.1214064707332 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.08
Image Trigger?: NO
Rate S/N Ratio: 25.9422435421457 [ if not an image trigger ]
Image S/N Ratio: 12.08
Analysis Position: [ source = BAT ]
RA: 276.583106903892 Dec: -86.1214064707332 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 276.645550071726 Dec: -86.1139251883559 [deg; J2000]
{ 18h 26m 34.9s , -86d 06' 50.1" }
+/- 1.02624251401057 [arcmin] (estimated 90% radius based on SNR)
+/- 0.479519881838883 [arcmin] (formal 1-sigma fit error)
SNR: 29.3121009941847
Angular difference between the analysis and refined position is 0.515597 arcmin
Partial Coding Fraction: 0.3632812 [ including projection effects ]
Duration
T90: 174 +/- 72.5275809606249
Measured from: -2.36000001430511
to: 171.639999985695 [s; relative to TRIGTIME]
T50: 36 +/- 11.0453610171873
Measured from: 0.639999985694885
to: 36.6399999856949 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.360000014305115
to: 0.639999985694885 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.36000001430511
to: 215.639999985695 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.098805 1.344951 0.814860 0.316382
0.084433 0.087657 0.079217 0.072386 [error]
Peak 0.059479 0.098433 0.091531 0.029370
0.009494 0.010486 0.010292 0.008571 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 220.000 -4.360 215.640
T90 174.000 -2.360 171.640
T50 36.000 0.640 36.640
Peak 1.000 -0.360 0.640
====== 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 -1.702 -0.139 0.137 - - - 9.98e-04 -8.44e-05 8.34e-05 65.870 57
CPL -1.608 -0.525 0.587 183.865 -164.233 -183.865 1.13e-03 -2.32e-04 1.26e-03 65.780 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 -1.219 -0.205 0.207 - - - 1.85e-02 -2.13e-03 2.13e-03 67.180 57
CPL -1.216 -0.204 0.686 9999.320 -9999.320 -9999.320 1.86e-02 -1.86e-02 2.01e-02 67.180 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 3.39e-07 5.50e-07 6.77e-07 1.64e-06 2.03e-06 3.21e-06 erg/cm2
90%_error_low -4.00e-08 -4.18e-08 -7.74e-08 -3.58e-07 -1.80e-07 -4.35e-07 erg/cm2
90%_error_hi 4.10e-08 4.18e-08 7.78e-08 4.22e-07 1.83e-07 4.87e-07 erg/cm2
Peak flux PL 5.82e-01 6.92e-01 5.95e-01 8.71e-01 2.18e+00 2.74e+00 ph/cm2/s
90%_error_low -1.24e-01 -9.29e-02 -8.23e-02 -2.32e-01 -2.56e-01 -3.35e-01 ph/cm2/s
90%_error_hi 1.32e-01 9.12e-02 8.11e-02 2.82e-01 2.56e-01 3.43e-01 ph/cm2/s
Fluence CPL 3.36e-07 5.57e-07 6.76e-07 1.37e-06 2.01e-06 2.94e-06 erg/cm2
90%_error_low -4.39e-08 -4.76e-08 -7.98e-08 -8.63e-07 -2.24e-07 -8.96e-07 erg/cm2
90%_error_hi 4.23e-08 5.68e-08 7.90e-08 3.58e-07 2.01e-07 7.28e-07 erg/cm2
Peak flux CPL 5.81e-01 6.91e-01 5.94e-01 8.66e-01 2.18e+00 2.76e+00 ph/cm2/s
90%_error_low N/A N/A N/A N/A N/A -5.66e-01 ph/cm2/s
90%_error_hi N/A N/A N/A N/A N/A 3.24e-01 ph/cm2/s
======================================================================
Special notes of this burst