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 -0.732 sec. to 132.344 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -2.10012 ( -0.0316912 0.0316467 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.10012 ( -0.0316467 0.0316912 )
Norm@50keV : 1.41594E-02 ( -0.000223325 0.000223313 )
------------------------------------------------------------
Photon flux (15-150 keV) in 133.1 sec: 2.22797 ( -0.0479 0.04824 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.75137e-05 ( -2.78429e-07 2.78437e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.732 sec. to 132.344 sec.
XSPEC: quit
Photon index: -1.61564 ( -0.139017 0.14307 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.61564 ( -0.14307 0.139017 )
Epeak [keV] : 43.1431 ( -6.09422 4.34973 )
Norm@50keV : 2.34425E-02 ( -0.00308822 0.00367097 )
------------------------------------------------------------
Photon flux (15-150 keV) in 133.1 sec: 2.09906 ( -0.05753 0.05822 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.68282e-05 ( -3.32634e-07 3.32589e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 33.816 sec. to 34.816 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.67787 ( -0.049271 0.0490161 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67787 ( -0.0490161 0.049271 )
Norm@50keV : 0.124363 ( -0.0033584 0.00335639 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 16.3918 ( -0.4832 0.4846 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15375e-06 ( -3.2274e-08 3.23191e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 33.816 sec. to 34.816 sec.
XSPEC: quit
Photon index: -1.17312 ( -0.210198 0.220288 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17312 ( -0.220288 0.210198 )
Epeak [keV] : 87.7220 ( -11.9391 25.0829 )
Norm@50keV : 0.214595 ( -0.0426834 0.0563396 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 15.8069 ( -0.5302 0.5327 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1183e-06 ( -3.56452e-08 3.55783e-08 ) ergs/cm2
Time-resolved spectra
