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: Mon Jan 20 03:40:30 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger306778
======================================================================
Trigger: 00306778 Segment: 000
BAT Trigger Time: 227622359.616 [s; MET]
Trigger Stop: 227622360.64 [s; MET]
UTC: 2008-03-19T12:25:56.961660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 258.973352489113 Dec: 55.4098844023449 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 15.1
Image Trigger?: NO
Rate S/N Ratio: 69.3613725354393 [ if not an image trigger ]
Image S/N Ratio: 15.1
Analysis Position: [ source = BAT ]
RA: 258.973352489113 Dec: 55.4098844023449 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 259.008096885045 Dec: 55.3913388801278 [deg; J2000]
{ 17h 16m 01.9s , +55d 23' 28.8" }
+/- 0.916906688220536 [arcmin] (estimated 90% radius based on SNR)
+/- 0.273196054266063 [arcmin] (formal 1-sigma fit error)
SNR: 34.4302049307086
Angular difference between the analysis and refined position is 1.624630 arcmin
Partial Coding Fraction: 0.3046875 [ including projection effects ]
Duration
T90: 29.5519999861717 +/- 9.41457083506473
Measured from: 0.212000012397766
to: 29.7639999985695 [s; relative to TRIGTIME]
T50: 7.45600000023842 +/- 0.45291942449091
Measured from: 1.95600000023842
to: 9.41200000047684 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.127999991178513
to: 1.12799999117851 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.328000009059906
to: 43.4200000166893 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.062880 1.879763 1.685047 0.497519
0.056512 0.061847 0.058308 0.052195 [error]
Peak 0.122295 0.212427 0.233555 0.079877
0.010521 0.013101 0.013873 0.011627 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 43.748 -0.328 43.420
T90 29.552 0.212 29.764
T50 7.456 1.956 9.412
Peak 1.000 0.128 1.128
====== 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 -1.285 -0.068 0.068 - - - 8.10e-03 -3.02e-04 3.02e-04 48.770 57
CPL -1.018 -0.271 0.285 201.645 -76.535 4411.335 1.08e-02 -2.40e-03 3.70e-03 45.870 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 -1.067 -0.107 0.108 - - - 4.40e-02 -2.75e-03 2.75e-03 40.650 57
CPL -0.906 -0.214 0.436 380.265 -380.265 -380.265 5.23e-02 -1.05e-02 2.97e-02 40.200 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 3.70e-07 7.75e-07 1.27e-06 4.72e-06 3.51e-06 7.14e-06 erg/cm2
90%_error_low -2.71e-08 -3.38e-08 -5.71e-08 -4.66e-07 -1.43e-07 -5.01e-07 erg/cm2
90%_error_hi 2.79e-08 3.37e-08 5.70e-08 5.02e-07 1.43e-07 5.30e-07 erg/cm2
Peak flux PL 1.20e+00 1.56e+00 1.49e+00 2.52e+00 5.09e+00 6.77e+00 ph/cm2/s
90%_error_low -1.43e-01 -1.16e-01 -1.06e-01 -3.64e-01 -3.23e-01 -4.67e-01 ph/cm2/s
90%_error_hi 1.49e-01 1.15e-01 1.06e-01 4.00e-01 3.23e-01 4.76e-01 ph/cm2/s
Fluence CPL 3.48e-07 7.90e-07 1.30e-06 3.27e-06 3.45e-06 5.71e-06 erg/cm2
90%_error_low -3.41e-08 -3.73e-08 -6.48e-08 -9.63e-07 -1.57e-07 -9.63e-07 erg/cm2
90%_error_hi 3.49e-08 3.77e-08 6.55e-08 1.36e-06 1.56e-07 1.35e-06 erg/cm2
Peak flux CPL 5.82e-01 4.45e-01 2.38e-01 2.22e-01 1.35e+00 1.53e+00 ph/cm2/s
90%_error_low -1.27e-01 -1.66e-01 -6.08e-02 -1.93e-02 -4.87e-01 -4.87e-01 ph/cm2/s
90%_error_hi 1.87e-01 1.09e-01 3.68e-02 1.48e-02 3.07e-01 2.27e-01 ph/cm2/s
======================================================================
Special notes of this burst