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 Mar 13 21:55:09 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger668689
======================================================================
Trigger: 00668689 Segment: 000
BAT Trigger Time: 473064643.584 [s; MET]
Trigger Stop: 473064644.096 [s; MET]
UTC: 2015-12-29T06:50:27.963280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 329.379608251525 Dec: -20.7287933382282 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17.29
Image Trigger?: NO
Rate S/N Ratio: 61.3595958265698 [ if not an image trigger ]
Image S/N Ratio: 17.29
Analysis Position: [ source = BAT ]
RA: 329.379608251525 Dec: -20.7287933382282 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 329.364113346494 Dec: -20.7320490922243 [deg; J2000]
{ 21h 57m 27.4s , -20d 43' 55.4" }
+/- 1.0313220661912 [arcmin] (estimated 90% radius based on SNR)
+/- 0.357623439046106 [arcmin] (formal 1-sigma fit error)
SNR: 29.106075488414
Angular difference between the analysis and refined position is 0.891176 arcmin
Partial Coding Fraction: 0.515625 [ including projection effects ]
Duration
T90: 1.43999993801117 +/- 0.447146548280103
Measured from: -0.0519999861717224
to: 1.38799995183945 [s; relative to TRIGTIME]
T50: 0.607999980449677 +/- 0.0804984237327102
Measured from: 0.139999985694885
to: 0.747999966144562 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.111999988555908
to: 0.888000011444092 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.111999988555908
to: 2.34399998188019 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.317135 0.399044 0.239992 0.044799
0.017669 0.018918 0.015941 0.011435 [error]
Peak 0.248873 0.320256 0.208133 0.039730
0.013449 0.014740 0.012565 0.008356 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 2.456 -0.112 2.344
T90 1.440 -0.052 1.388
T50 0.608 0.140 0.748
Peak 1.000 -0.112 0.888
====== 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 -1.843 -0.103 0.101 - - - 2.59e-02 -1.62e-03 1.60e-03 48.280 57
CPL -1.442 -0.393 0.434 65.878 -15.048 318.777 4.22e-02 -1.56e-02 2.86e-02 45.220 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 -1.739 -0.096 0.094 - - - 5.33e-02 -3.05e-03 3.03e-03 60.320 57
CPL -1.442 -0.335 0.383 92.378 -28.238 -92.378 7.57e-02 -2.39e-02 4.23e-02 58.250 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 1.12e-07 1.67e-07 1.87e-07 3.93e-07 5.85e-07 8.60e-07 erg/cm2
90%_error_low -1.00e-08 -9.58e-09 -1.56e-08 -6.40e-08 -3.67e-08 -7.94e-08 erg/cm2
90%_error_hi 1.03e-08 9.57e-09 1.56e-08 7.16e-08 3.69e-08 8.49e-08 erg/cm2
Peak flux PL 2.76e+00 2.41e+00 1.44e+00 1.30e+00 7.17e+00 7.92e+00 ph/cm2/s
90%_error_low -2.44e-01 -1.35e-01 -1.06e-01 -1.82e-01 -3.99e-01 -4.25e-01 ph/cm2/s
90%_error_hi 2.51e-01 1.35e-01 1.05e-01 1.99e-01 4.00e-01 4.25e-01 ph/cm2/s
Fluence CPL N/A N/A N/A N/A N/A N/A erg/cm2
90%_error_low -1.00e-08 -9.58e-09 -1.56e-08 -6.40e-08 -3.67e-08 -7.94e-08 erg/cm2
90%_error_hi 1.03e-08 9.57e-09 1.56e-08 7.16e-08 3.69e-08 8.49e-08 erg/cm2
Peak flux CPL 2.62e+00 2.48e+00 1.48e+00 9.29e-01 7.08e+00 7.51e+00 ph/cm2/s
90%_error_low -2.90e-01 -1.59e-01 -1.15e-01 -3.08e-01 -4.14e-01 -5.37e-01 ph/cm2/s
90%_error_hi 2.94e-01 1.62e-01 1.17e-01 4.48e-01 4.14e-01 6.18e-01 ph/cm2/s
======================================================================
Special notes of this burst