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Home All issues Volume 510 (February 2010) A&A, 510 (2010) A67 Full HTML
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Table 3:

Parameters from spectral fits to the PSR J1740-5340 binary system.
Orbital Phase Model a $N_{\rm H}$ b $\Gamma$/kT(keV) $\chi^{2}_{\nu}$/d.o.f. Fx c Lx d Note
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 $1.7^{\rm +0.5}_{-0.4}$ $1.3^{\rm +0.4}_{-0.3}\times10^{31}$  
0.45-0.05 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 $2.9^{\rm +0.4}_{-0.5}$ $2.2^{\rm +0.3}_{-0.4}\times10^{31}$  
0.0-1.0 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 $2.6^{\rm +0.3}_{-0.4}$ $1.9^{\rm +0.2}_{-0.3}\times10^{31}$  

Notes. 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.
(a) PL = power law; TB = thermal bremsstrahlung. (b) In units of 1021 cm-2. (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. (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 (Grindlay et al. 2001).


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