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 -0.452 sec. to 100.704 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.42896 ( -0.0313725 0.0314473 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42896 ( -0.0314473 0.0313725 )
Norm@50keV : 1.21823E-02 ( -0.000198568 0.000198296 )
------------------------------------------------------------
Photon flux (15-150 keV) in 101.2 sec: 1.49366 ( -0.02896 0.02907 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18457e-05 ( -1.89637e-07 1.90014e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.452 sec. to 100.704 sec.
XSPEC: quit
Photon index: -1.36535 ( -0.075616 0.126221 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36535 ( -0.126221 0.075616 )
Epeak [keV] : 599.852 ( -599.87 -599.87 )
Norm@50keV : 1.29474E-02 ( -0.00049276 0.00161693 )
------------------------------------------------------------
Photon flux (15-150 keV) in 101.2 sec: 1.48467 ( -0.03339 0.03361 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18035e-05 ( -2.06333e-07 2.02045e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 23.528 sec. to 24.528 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.07644 ( -0.0396925 0.0397766 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.07644 ( -0.0397766 0.0396925 )
Norm@50keV : 0.178279 ( -0.00387333 0.00387024 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 20.6346 ( -0.4665 0.467 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.87841e-06 ( -4.33934e-08 4.34423e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 23.528 sec. to 24.528 sec.
XSPEC: quit
Photon index: -0.836151 ( -0.159575 0.165297 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.836151 ( -0.165297 0.159575 )
Epeak [keV] : 292.702 ( -93.8253 419.372 )
Norm@50keV : 0.224815 ( -0.0313749 0.0376813 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 20.3521 ( -0.4984 0.5 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.86016e-06 ( -4.54802e-08 4.53446e-08 ) ergs/cm2
Time-resolved spectra
