\begin{table}%t3 \caption{\label{spec}Parameters from spectral fits to the PSR J1740-5340 binary system.} %\centering \par \begin{tabular}{lccccccc} \hline \hline Orbital Phase & Model \tablefootmark{a} & $N_{\rm H}$ \tablefootmark{b} & $\Gamma$/kT(keV) & $\chi^{2}_{\nu}$/d.o.f. & $F_{x}$ \tablefootmark{c}& $L_{x}$ \tablefootmark{d}& Note \\[0.5ex] \hline\\[-1ex] 0.05--0.45 & PL & $<$1.4 & $1.8^{\rm +0.4}_{-0.3}$ & 1.39/20 & $1.9^{\rm +1.8}_{-0.7}$ & $1.4^{\rm +1.3}_{-0.5}\times10^{31}$ & inside eclipsing region \\ & TB & $<$0.8 & $7.2^{\rm +10.4}_{-3.4}$ & 1.42/20 & $1.7^{\rm +0.5}_{-0.4}$ & $1.3^{\rm +0.4}_{-0.3}\times10^{31}$ & \\[0.5ex] \hline\\[-1.5ex] 0.45--0.05 & PL & $1.8^{\rm +1.0}_{-0.7}$ & $1.7^{\rm +0.1}_{-0.2}$ & 0.96/19 & $3.3^{\rm +1.4}_{-0.8}$ & $2.5^{\rm +1.1}_{-0.6}\times10^{31}$ & outside eclipsing region \\ & TB & $1.3^{\rm +0.6}_{-0.9}$ & $7.3^{\rm +9.6}_{-1.7}$ & 1.00/19 & $2.9^{\rm +0.4}_{-0.5}$ & $2.2^{\rm +0.3}_{-0.4}\times10^{31}$ & \\[0.5ex] \hline\\[-1.5ex] 0.0--1.0 & PL & $0.6^{\rm +0.4}_{-0.3}$ & $1.5^{\rm +0.2}_{-0.1}$ & 1.07/19 & $2.8^{\rm +0.9}_{-0.8}$ & $2.1^{\rm +0.7}_{-0.6}\times10^{31}$ & whole orbit \\ & TB & $<$0.7 & $16.1^{\rm +23.2}_{-7.6}$ & 1.11/19 & $2.6^{\rm +0.3}_{-0.4}$ & $1.9^{\rm +0.2}_{-0.3}\times10^{31}$ & \\[0.5ex] \hline \end{tabular} \tablefoot{Column 1 gives the orbital phase, Cols. 2--5 show the spectral model, the hydrogen column density $N_{\rm H}$, the best-fitted photon index or temperature, and the reduced $\chi^{2}$ together with degrees of freedom. Cols. 6--7 list the unabsorbed X-ray flux and luminosity in the $0.3{-}8.0$ keV energy range. Quoted errors indicate the 68\% confidence level for one parameter of interest. \\ \tablefootmark{(a)} PL $=$ power law; TB $=$ thermal bremsstrahlung. \tablefootmark{(b)} In units of $10^{21}$~cm$^{-2}$. \tablefootmark{(c)} Unabsorbed X-ray flux in units of $10^{-14}$~erg~cm$^{-2}$~s$^{-1}$ and in the energy range of 0.3--8.0 keV. \tablefootmark{(d)} Unabsorbed X-ray luminosity in units of erg~s$^{-1}$ and in the energy range of 0.3--8.0 keV for a distance of 2.5 kpc \citep{2001grindlay}.} \end{table}