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 -9.972 sec. to 5.368 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.40624 ( -0.0942883 0.0943835 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40624 ( -0.0943835 0.0942883 )
Norm@50keV : 7.59002E-03 ( -0.000411398 0.000411183 )
------------------------------------------------------------
Photon flux (15-150 keV) in 15.34 sec: 0.925658 ( -0.052096 0.052182 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12374e-06 ( -6.63002e-08 6.66126e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.972 sec. to 5.368 sec.
XSPEC: quit
Photon index: -1.05405 ( -0.352242 0.385783 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.05405 ( -0.385783 0.352242 )
Epeak [keV] : 140.810 ( -48.2124 858.832 )
Norm@50keV : 1.12564E-02 ( -0.00352904 0.00585461 )
------------------------------------------------------------
Photon flux (15-150 keV) in 15.34 sec: 0.910541 ( -0.054199 0.054242 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.09839e-06 ( -7.17536e-08 7.15309e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.160 sec. to 0.840 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.20906 ( -0.140062 0.141248 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20906 ( -0.141248 0.140062 )
Norm@50keV : 2.32833E-02 ( -0.0018952 0.00189519 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 2.73654 ( -0.22919 0.22946 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35646e-07 ( -2.12286e-08 2.13522e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.160 sec. to 0.840 sec.
XSPEC: quit
Photon index: -1.06037 ( -0.272972 0.56581 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06037 ( -0.56581 0.272972 )
Epeak [keV] : 344.871 ( -344.871 -344.871 )
Norm@50keV : 2.73918E-02 ( -0.00578105 0.0223757 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 2.72262 ( -0.23426 0.23426 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.339e-07 ( -2.23417e-08 2.20705e-08 ) ergs/cm2
Time-resolved spectra
