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
Time interval is from -3.452 sec. to 46.556 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.31477 ( -0.0354386 0.0355306 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31477 ( -0.0355306 0.0354386 )
Norm@50keV : 1.41323E-02 ( -0.000266309 0.000266095 )
------------------------------------------------------------
Photon flux (15-150 keV) in 50.01 sec: 1.69071 ( -0.03592 0.03604 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.95994e-06 ( -1.32046e-07 1.32354e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.452 sec. to 46.556 sec.
XSPEC: quit
Photon index: -1.17354 ( -0.0718057 0.145021 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17354 ( -0.145021 0.0718057 )
Epeak [keV] : 348.736 ( -145.146 7122.89 )
Norm@50keV : 1.62116E-02 ( -0.00189892 0.00238784 )
------------------------------------------------------------
Photon flux (15-150 keV) in 50.01 sec: 1.67206 ( -0.03999 0.04019 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.90998e-06 ( -1.41413e-07 1.41118e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.016 sec. to 1.016 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.08205 ( -0.0351305 0.0352274 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08205 ( -0.0352274 0.0351305 )
Norm@50keV : 0.231958 ( -0.00471093 0.00470681 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 1.55392 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.4395e-06 ( -5.13588e-08 5.13639e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.016 sec. to 1.016 sec.
XSPEC: quit
Photon index: -0.616037 ( -0.150435 0.155306 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.616037 ( -0.155306 0.150435 )
Epeak [keV] : 179.646 ( -29.9509 55.2923 )
Norm@50keV : 0.364429 ( -0.0482875 0.0573725 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 26.2606 ( -0.5932 0.5946 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.40392e-06 ( -5.34755e-08 5.33903e-08 ) ergs/cm2
Time-resolved spectra
