Table 10: Limits on the amplitude (normalization) of a non-thermal power-law (PL) component with $\Gamma =1.5$ as the explanation of the excess hard X-ray emission in the SE quadrant.
Sensor Modela Normalizationb $\chi^2/{\rm d.o.f.}^{c}$ Flux(12-60 keV)d
    ${\rm NXB} \times 1.00$ ${\rm NXB} \times0.97$ ${\rm NXB} \times 1.00$ ${\rm NXB} \times0.97$ [ ${\rm erg~s^{-1}~cm^{-2}}$]
PIN APEC+PL $\sim$0 $5.1 \times 10^{-4}$ 7.2/7 4.6/7 ${<}2.11\times10^{-11}$
XIS0-3+PIN APEC+PL ${<}1.6\times10^{-4}$ $2.0\times10^{-4}$ 1310.2/1218 1344.3/1218 ${<}8.2\times10^{-12}$
PIN PL 1.8(0.7- $2.9)\times10^{-4}$ $6.3\times10^{-4}$ 8.8/9 5.1/9 ${<}2.15\times10^{-11}$
XIS0-3+PIN PL 2.48(2.39- $2.59)\times10^{-4}$ $2.52\times10^{-4}$ 1322.8/1220 1351.9/1220 ${<}3.8\times10^{-12}$
a The spectral model for the SE excess emission; b the amplitude (normalization) of the power-law component after removing the NXB models with rescaling factors of 1 and 0.97. The error and limits are the $1\sigma$ bound; c the values of $\chi^2$ and the number of degrees of freedom; d the $3\sigma$ upper limit on the energy flux of the power-law component in the 12-60 keV band.

Source LaTeX | All tables | In the text