Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
Time averaged spectrum fit using the average DRM
Power-law model
Multiple GTIs in the spectrum
tstart tstop
-122.904000 148.626800
150.000000 231.188000
XSPEC12>exit
XSPEC: quit
Photon index: -1.77401 ( -0.0553888 0.0551125 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.77401 ( -0.0551125 0.0553888 )
Norm@50keV : 3.42302E-03 ( -0.000103211 0.000103058 )
------------------------------------------------------------
Photon flux (15-150 keV) in 352.7 sec: 0.467039 ( -0.015092 0.015143 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1128e-05 ( -3.42587e-07 3.43407e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-122.904000 148.626800
150.000000 231.188000
XSPEC: quit
Photon index: -1.21205 ( -0.236036 0.249358 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21205 ( -0.249358 0.236036 )
Epeak [keV] : 70.8263 ( -8.35355 16.3353 )
Norm@50keV : 6.45937E-03 ( -0.00147924 0.00205247 )
------------------------------------------------------------
Photon flux (15-150 keV) in 352.7 sec: 0.448127 ( -0.016735 0.016806 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06447e-05 ( -3.94932e-07 3.94922e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 99.748 sec. to 100.748 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.39135 ( -0.127255 0.126818 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39135 ( -0.126818 0.127255 )
Norm@50keV : 2.94505E-02 ( -0.00227859 0.00227567 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 3.57961 ( -0.28501 0.28542 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.85115e-07 ( -2.38868e-08 2.39928e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 99.748 sec. to 100.748 sec.
XSPEC: quit
Photon index: -0.811558 ( -0.508641 0.573597 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.811558 ( -0.573597 0.508641 )
Epeak [keV] : 111.445 ( -31.0865 323.213 )
Norm@50keV : 5.55027E-02 ( -0.0232214 0.0456659 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 3.50811 ( -0.29286 0.29261 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.78914e-07 ( -2.48284e-08 2.48386e-08 ) ergs/cm2
Time-resolved spectra
