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 -90.880 sec. to 50.624 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -1.40317 ( -0.300579 0.309379 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40317 ( -0.309379 0.300579 )
Norm@50keV : 9.15706E-04 ( -0.000162308 0.000162129 )
------------------------------------------------------------
Photon flux (15-150 keV) in 141.5 sec: 0.111599 ( -0.0208011 0.020923 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.25134e-06 ( -2.36295e-07 2.3828e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -90.880 sec. to 50.624 sec.
XSPEC: quit
Photon index: -1.15998 ( -1.31201 1.2571 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15998 ( -1.2571 1.31201 )
Epeak [keV] : 174.747 ( -174.718 -174.718 )
Norm@50keV : 1.21601E-03 ( -0.000452911 0.00389644 )
------------------------------------------------------------
Photon flux (15-150 keV) in 141.5 sec: 0.110642 ( -0.0211664 0.010839 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23026e-06 ( -2.58236e-07 2.51223e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 1.428 sec. to 2.428 sec.
XSPEC12>exit
XSPEC: quit
Photon index: -2.16331 ( -0.356182 0.31486 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.16331 ( -0.31486 0.356182 )
Norm@50keV : 1.08658E-02 ( -0.00256125 0.00244327 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 1.76504 ( -0.29527 0.29535 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01683e-07 ( -2.03868e-08 2.09733e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.428 sec. to 2.428 sec.
XSPEC: quit
Photon index: -1.86754 ( -0.182087 1.51609 )
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86754 ( -1.51609 0.182087 )
Epeak [keV] : 19.3001 ( )
Norm@50keV : 1.60773E-02 ( )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 1.75043 ( -0.30328 0.29607 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Time-resolved spectra
