11.605   0.326   3.45E-04           3.31E-04          2.80E-04    2.54E+30$\pm$1.71E+29
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  :  : The optical and derived X-ray properties of the cluster candidates that are found within 3-sigma of the X-ray sources in Table \[xraymembers\]. The Table is only available electronically and contains 108 rows. The first two rows are shown here as a guide to form and content. We list (1) the running source identification number, (2)–(6) the catalogue identifier, separation between optical and X-ray position, $V$, $B-V$ and $V-I$ photometry from Naylor et al. (2002), (7)–(10) the identifier, separation between optical and X-ray position, $I$ and $R-I$ from Jeffries et al. (2004), (11)–(13) the $L_{\rm x}/L_{\rm bol}$ (for the 0.3–3keV energy band) calculated using bolometric corrections derived from the $B-V$, $V-I$ and $R-I$ indices respectively, (14) $L_{\rm x}$ (0.3–3keV, assuming a distance of 417pc) and its 1-sigma uncertainty.

\[counterparts\]

![V,B-V diagram for X-ray selected members of NGC 2547 (open squares). The isochrone is derived from the models of D’Antona & Mazzitelli (1997) using an age of 30Myr, a distance modulus of 8.1, reddening and extinction appropriate for $E(B-V)=0.06$ and a colour-$T_{\rm eff}$ relation calibrated using the Pleiades (see Naylor 