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 -144.312 sec. to 92.936 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.63711 ( -0.19912 0.195305 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63711 ( -0.195305 0.19912 )
Norm@50keV : 1.06888E-03 ( -0.000124075 0.000122314 )
------------------------------------------------------------
Photon flux (15-150 keV) in 237.2 sec: 0.138986 ( -0.015174 0.015199 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36148e-06 ( -2.91414e-07 2.94987e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -144.312 sec. to 92.936 sec.
XSPEC: quit
Photon index: -1.63542 ( -0.912524 0.638454 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63542 ( -0.638454 0.912524 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 1.07120E-03 ( -0.000124867 0.000114741 )
------------------------------------------------------------
Photon flux (15-150 keV) in 237.2 sec: 0.139475 ( -0.017366 0.016135 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.37812e-06 ( -3.77314e-07 2.39368e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 41.844 sec. to 42.844 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.3092 ( -0.485391 0.493775 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30920 ( -0.493775 0.485391 )
Norm@50keV : 5.73765E-03 ( -0.0018173 0.00181728 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 0.685393 ( -0.222695 0.226143 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.66096e-08 ( -1.88393e-08 1.92499e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 41.844 sec. to 42.844 sec.
XSPEC: quit
Photon index: 1.5104 ( -2.36325 5.11519 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.51040 ( -5.11519 2.36325 )
Epeak [keV] : 65.2321 ( -18.6144 71.9345 )
Norm@50keV : 0.123562 ( -0.123069 50.5871 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 0.621415 ( -0.21221 0.226551 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.95256e-08 ( -1.83554e-08 1.9924e-08 ) ergs/cm2
Time-resolved spectra
