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    0.000 sec. to    9.471 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.25357     ( -0.0970393   0.0976234 )
Norm@50keV  : 1.42985E-02    ( -0.000748022   0.000747993 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.05 using 59 PHA bins.
# Reduced chi-squared =         0.9833 for     57 degrees of freedom 
# Null hypothesis probability =   5.107855e-01
 
Photon flux (15-150 keV)    in 9.471 sec: 1.69212 ( -0.09297  0.09324 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.35418e-06 ( -7.79617e-08  7.82885e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    0.000 sec. to    9.471 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.25062     ( -0.0966737   0.298088 )
Epeak [keV] : 9999.15      ( -9999.28 -9999.28 )
Norm@50keV  : 1.43622E-02    ( -0.000751167   0.000751223 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.06 using 59 PHA bins.
# Reduced chi-squared =          1.001 for     56 degrees of freedom 
# Null hypothesis probability =   4.724837e-01
 
Photon flux (15-150 keV)    in 9.471 sec: 1.69885 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.35924e-06 ( -1.07235e-07  7.39238e-08 ) ergs/cm2
 

1-s peak spectrum fit

1-s peak spectrum unavailable, likely because there are no event data in the 1-s peak range.

Time-resolved spectra