Table 1: Best-fit spectral parameters for the 6 XMM-Newton observations of HD 81809 discussed here. Count rates in cts s-1, luminosity in erg s-1, temperature of the plasma in keV.

Date		 pn rate $L_{\rm X}$ (0.2-2.5 keV) $L_{\rm X}$ (0.73-3.5 keV) kT

2001-04-25		 $0.1830 \pm 0.055$ $3.85 \times 10^{28}$ $1.46 \times 10^{28}$ 0.34
2001-11-01 $0.3418 \pm 0.024$ $6.42 \times 10^{28}$ $2.91 \times 10^{28}$ 0.40
2002-06-06 $0.7456 \pm 0.037$ $1.78 \times 10^{29}$ $8.88 \times 10^{29}$ 0.81
2002-11-02 $0.2455 \pm 0.024$ $5.31 \times 10^{28}$ $2.31 \times 10^{28}$ 0.39
2003-05-03 $0.1522 \pm 0.017$ $3.37 \times 10^{28}$ $1.36 \times 10^{28}$ 0.36
2003-11-22 $0.0744 \pm 0.012$ $2.05 \times 10^{28}$ $7.33 \times 10^{27}$ 0.33


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