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 -0.720 sec. to 79.720 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.85002 ( -0.0975652 0.0957537 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85002 ( -0.0957537 0.0975652 )
Norm@50keV : 2.29378E-03 ( -0.000141019 0.000139955 )
------------------------------------------------------------
Photon flux (15-150 keV) in 80.44 sec: 0.322436 ( -0.017733 0.017748 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.69681e-06 ( -1.04447e-07 1.05345e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.720 sec. to 79.720 sec.
XSPEC: quit
Photon index: -0.657683 ( -0.469126 0.52667 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.657683 ( -0.52667 0.469126 )
Epeak [keV] : 49.7219 ( -5.03991 7.23416 )
Norm@50keV : 1.03498E-02 ( -0.0045772 0.009729 )
------------------------------------------------------------
Photon flux (15-150 keV) in 80.44 sec: 0.305269 ( -0.01873 0.018764 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.52733e-06 ( -1.14201e-07 1.18071e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 2.804 sec. to 3.804 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.34952 ( -0.173759 0.1736 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34952 ( -0.1736 0.173759 )
Norm@50keV : 1.27463E-02 ( -0.00141608 0.00141378 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 1.53543 ( -0.17182 0.17201 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24517e-07 ( -1.51642e-08 1.52743e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.804 sec. to 3.804 sec.
XSPEC: quit
Photon index: -0.118322 ( -0.818952 0.997352 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.118322 ( -0.997352 0.818952 )
Epeak [keV] : 77.7184 ( -15.6731 54.1886 )
Norm@50keV : 5.26209E-02 ( -0.0316642 0.106226 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 1.48452 ( -0.17624 0.17597 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16356e-07 ( -1.5973e-08 1.62735e-08 ) ergs/cm2
Time-resolved spectra
