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 -31.448 sec. to 112.552 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.30504 ( -0.136229 0.137286 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30504 ( -0.137286 0.136229 )
Norm@50keV : 1.49306E-03 ( -0.00010931 0.00010922 )
------------------------------------------------------------
Photon flux (15-150 keV) in 144 sec: 0.178295 ( -0.013477 0.013522 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12223e-06 ( -1.73988e-07 1.7536e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -31.448 sec. to 112.552 sec.
XSPEC: quit
Photon index: -1.30629 ( -0.132644 0.142683 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30629 ( -0.142683 0.132644 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 1.49626E-03 ( -0.000109275 0.000570617 )
------------------------------------------------------------
Photon flux (15-150 keV) in 144 sec: 0.179262 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.13306e-06 ( -2.36254e-07 2.15182e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 8.052 sec. to 9.052 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.30127 ( -0.364142 0.373948 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30127 ( -0.373948 0.364142 )
Norm@50keV : 5.86953E-03 ( -0.00132906 0.00132552 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 0.700427 ( -0.159503 0.159912 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.79896e-08 ( -1.44163e-08 1.47197e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.052 sec. to 9.052 sec.
XSPEC: quit
Photon index: -0.203971 ( -1.26409 2.19253 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.203971 ( -2.19253 1.26409 )
Epeak [keV] : 78.7575 ( -28.2282 -78.7575 )
Norm@50keV : 2.19539E-02 ( -0.0219538 0.261604 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 0.674839 ( -0.16324 0.16394 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.27036e-08 ( -1.52908e-08 1.64285e-08 ) ergs/cm2
Time-resolved spectra
