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 -15.280 sec. to 96.720 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.23195 ( -0.0459914 0.0461953 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23195 ( -0.0461953 0.0459914 )
Norm@50keV : 1.70440E-02 ( -0.000437285 0.000436964 )
------------------------------------------------------------
Photon flux (15-150 keV) in 112 sec: 2.01009 ( -0.05571 0.05584 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.91989e-05 ( -5.09844e-07 5.10228e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.280 sec. to 96.720 sec.
XSPEC: quit
Photon index: -0.99319 ( -0.180811 0.188447 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.993190 ( -0.188447 0.180811 )
Epeak [keV] : 245.349 ( -82.2239 514.241 )
Norm@50keV : 2.16774E-02 ( -0.00352686 0.00438649 )
------------------------------------------------------------
Photon flux (15-150 keV) in 112 sec: 1.98230 ( -0.05912 0.05928 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.89893e-05 ( -5.37919e-07 5.36499e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 8.220 sec. to 9.220 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.76585 ( -0.242967 0.230927 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76585 ( -0.230927 0.242967 )
Norm@50keV : 3.56247E-02 ( -0.00582387 0.0057321 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 4.84575 ( -0.74278 0.74343 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.28488e-07 ( -5.45073e-08 5.48483e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.220 sec. to 9.220 sec.
XSPEC: quit
Photon index: -0.521373 ( -1.14 1.40567 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.521373 ( -1.40567 1.14 )
Epeak [keV] : 57.3426 ( -12.4055 86.1173 )
Norm@50keV : 0.161939 ( -0.161955 0.680768 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 4.30882 ( -1.089 0.69372 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.15762e-07 ( -5.49485e-08 5.60128e-08 ) ergs/cm2
Time-resolved spectra
