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 May 10 04:00:45 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger531223
======================================================================
Trigger: 00531223 Segment: 000
BAT Trigger Time: 366837524.288 [s; MET]
Trigger Stop: 366837528.384 [s; MET]
UTC: 2012-08-16T19:18:34.743480 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 282.126089347899 Dec: -6.9789643544855 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.94
Image Trigger?: NO
Rate S/N Ratio: 10.2469507659596 [ if not an image trigger ]
Image S/N Ratio: 6.94
Analysis Position: [ source = BAT ]
RA: 282.126089347899 Dec: -6.9789643544855 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 282.130627737682 Dec: -6.97900129061139 [deg; J2000]
{ 18h 48m 31.4s , -06d 58' 44.4" }
+/- 2.17330971092898 [arcmin] (estimated 90% radius based on SNR)
+/- 0.847054394451738 [arcmin] (formal 1-sigma fit error)
SNR: 10.0349696864783
Angular difference between the analysis and refined position is 0.270295 arcmin
Partial Coding Fraction: 0.09277344 [ including projection effects ]
Duration
T90: 4.432000041008 +/- 0.976917597564729
Measured from: 0.568000018596649
to: 5.00000005960464 [s; relative to TRIGTIME]
T50: 2.2720000743866 +/- 0.679199513816435
Measured from: 1.46399998664856
to: 3.73600006103516 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.828000009059906
to: 1.82800000905991 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.280000030994415
to: 5.06400001049042 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.296047 0.269451 0.120115 0.007397
0.043321 0.043974 0.036089 0.030784 [error]
Peak 0.041899 0.114316 0.043619 0.008267
0.019554 0.019751 0.017046 0.013733 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 4.784 0.280 5.064
T90 4.432 0.568 5.000
T50 2.272 1.464 3.736
Peak 1.000 0.828 1.828
====== 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 -2.509 -0.395 0.335 - - - 7.77e-03 -2.17e-03 2.10e-03 54.340 57
CPL -1.493 -0.509 1.939 18.991 N/A N/A 3.26e-02 N/A N/A 53.030 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 -1.989 -0.445 0.402 - - - 1.37e-02 -3.94e-03 3.82e-03 58.020 57
CPL 0.179 -2.332 4.821 45.071 -27.871 -45.071 2.07e-01 -2.07e-01 1.17e+02 55.650 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 1.24e-07 1.24e-07 8.69e-08 9.69e-08 3.73e-07 4.31e-07 erg/cm2
90%_error_low -2.61e-08 -2.41e-08 -3.10e-08 -5.27e-08 -7.63e-08 -1.06e-07 erg/cm2
90%_error_hi 2.67e-08 2.34e-08 3.35e-08 8.21e-08 7.88e-08 1.25e-07 erg/cm2
Peak flux PL 9.02e-01 6.81e-01 3.43e-01 2.48e-01 2.04e+00 2.17e+00 ph/cm2/s
90%_error_low -3.25e-01 -1.77e-01 -1.21e-01 -1.35e-01 -5.40e-01 -5.59e-01 ph/cm2/s
90%_error_hi 3.54e-01 1.76e-01 1.21e-01 1.94e-01 5.43e-01 5.60e-01 ph/cm2/s
Fluence CPL N/A N/A N/A N/A N/A N/A erg/cm2
90%_error_low -2.61e-08 -2.41e-08 -3.10e-08 -5.27e-08 -7.63e-08 -1.06e-07 erg/cm2
90%_error_hi 2.67e-08 2.34e-08 3.35e-08 8.21e-08 7.88e-08 1.25e-07 erg/cm2
Peak flux CPL 6.68e-01 8.43e-01 3.64e-01 3.86e-02 1.91e+00 1.91e+00 ph/cm2/s
90%_error_low -3.94e-01 -2.52e-01 -1.91e-01 -3.86e-02 -5.69e-01 -5.73e-01 ph/cm2/s
90%_error_hi 4.38e-01 2.75e-01 1.61e-01 2.66e-01 5.70e-01 5.86e-01 ph/cm2/s
======================================================================
Special notes of this burst