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 -0.016 sec. to 0.672 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.45184 ( -0.171227 0.168983 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45184 ( -0.168983 0.171227 )
Norm@50keV : 1.68135E-02 ( -0.00183456 0.00182433 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.688 sec: 2.07303 ( -0.2197 0.21981 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.10672e-07 ( -1.32635e-08 1.34009e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.016 sec. to 0.672 sec.
XSPEC: quit
Photon index: -0.534902 ( -0.694607 0.829632 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.534902 ( -0.829632 0.694607 )
Epeak [keV] : 77.7636 ( -18.3751 86.7387 )
Norm@50keV : 5.04322E-02 ( -0.028031 0.0833924 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.688 sec: 2.01902 ( -0.22365 0.22368 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.03896e-07 ( -1.42005e-08 1.44054e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.170 sec. to 0.830 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.41246 ( -0.183848 0.182888 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41246 ( -0.182888 0.183848 )
Norm@50keV : 1.21961E-02 ( -0.00142297 0.00141713 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 1.48954 ( -0.1715 0.17164 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17566e-07 ( -1.50811e-08 1.52315e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.170 sec. to 0.830 sec.
XSPEC: quit
Photon index: -0.602359 ( -0.742177 0.855772 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.602359 ( -0.855772 0.742177 )
Epeak [keV] : 84.0885 ( -23.1773 204.322 )
Norm@50keV : 3.22326E-02 ( -0.0181839 0.0563063 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 1.45644 ( -0.17401 0.17413 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.10958e-07 ( -1.62929e-08 1.64216e-08 ) ergs/cm2
Time-resolved spectra
