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 May 23 21:50:33 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger345551
======================================================================
Trigger: 00345551 Segment: 000
BAT Trigger Time: 258090402.432 [s; MET]
Trigger Stop: 258090414.592 [s; MET]
UTC: 2009-03-07T03:46:37.877980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 244.979295086239 Dec: -28.6441582093691 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.73
Image Trigger?: NO
Rate S/N Ratio: 10.3923048454133 [ if not an image trigger ]
Image S/N Ratio: 5.73
Analysis Position: [ source = BAT ]
RA: 244.979295086239 Dec: -28.6441582093691 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 244.969142654586 Dec: -28.6657018334008 [deg; J2000]
{ 16h 19m 52.6s , -28d 39' 56.5" }
+/- 3.06080309952171 [arcmin] (estimated 90% radius based on SNR)
+/- 1.69815987424359 [arcmin] (formal 1-sigma fit error)
SNR: 6.15272946070803
Angular difference between the analysis and refined position is 1.398783 arcmin
Partial Coding Fraction: 0.875 [ including projection effects ]
Duration
T90: 22 +/- 6.40312423743285
Measured from: -7.43200001120567
to: 14.5679999887943 [s; relative to TRIGTIME]
T50: 12 +/- 8.60232526704263
Measured from: -2.43200001120567
to: 9.56799998879433 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.56799998879433
to: 6.56799998879433 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.43200001120567
to: 16.5679999887943 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.066525 0.122082 0.111408 0.047047
0.030098 0.028331 0.024587 0.022300 [error]
Peak 0.007867 0.016457 0.004152 -0.001405
0.006193 0.005892 0.004971 0.004618 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 24.000 -7.432 16.568
T90 22.000 -7.432 14.568
T50 12.000 -2.432 9.568
Peak 1.000 5.568 6.568
====== 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 -0.985 -0.390 0.430 - - - 1.02e-03 -2.33e-04 2.28e-04 60.320 57
CPL -0.528 0.528 6.220 175.781 -175.781 -175.781 1.67e-03 -8.54e-04 1.16e+00 60.230 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: N/A)
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 -1.549 -1.005 1.078 - - - 2.13e-03 -2.13e-03 1.11e-03 50.790 57
CPL -1.245 N/A N/A 97.476 N/A N/A 3.27e-03 N/A N/A 50.860 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 1.94e-08 4.89e-08 9.88e-08 5.02e-07 2.67e-07 6.69e-07 erg/cm2
90%_error_low -8.53e-09 -1.42e-08 -2.32e-08 -2.27e-07 -6.05e-08 -2.42e-07 erg/cm2
90%_error_hi 1.02e-08 1.37e-08 2.28e-08 3.54e-07 6.12e-08 3.54e-07 erg/cm2
Peak flux PL 9.18e-02 8.97e-02 6.13e-02 6.58e-02 2.69e-01 3.09e-01 ph/cm2/s
90%_error_low -6.94e-02 -8.97e-02 -3.98e-02 -6.58e-02 -1.38e-01 -1.57e-01 ph/cm2/s
90%_error_hi 8.46e-02 4.73e-02 4.08e-02 1.59e-01 1.39e-01 1.61e-01 ph/cm2/s
Fluence CPL 1.76e-08 5.05e-08 1.02e-07 2.78e-07 2.58e-07 4.36e-07 erg/cm2
90%_error_low -1.41e-08 -1.50e-08 -2.63e-08 N/A -1.04e-07 -2.82e-07 erg/cm2
90%_error_hi 1.17e-08 1.88e-08 2.99e-08 N/A 6.83e-08 3.13e-07 erg/cm2
Peak flux CPL 9.22e-02 8.96e-02 6.12e-02 6.62e-02 2.70e-01 3.15e-01 ph/cm2/s
90%_error_low -9.22e-02 -5.01e-02 -3.97e-02 -6.62e-02 -1.38e-01 -3.15e-01 ph/cm2/s
90%_error_hi 8.44e-02 1.28e-01 4.25e-02 1.56e-01 1.38e-01 1.51e-01 ph/cm2/s
======================================================================
Special notes of this burst