Table 1: General characteristics of NGC 4666.

Type(a)		 RA(b) Dec(b) D(c) $B_{\rm T}^{\rm i,0 ~(d)}$ log  $L_{\rm B}^{0~(e)}$ log  $N_{\rm H}^{(f)}$ log  $L_{\rm FIR}^{(g)}$ Incl.(h) $R_{25}^{{\rm i,0} ~(i)}$ log  L0.5-2(j) log  L2-10(k)
  (J2000) (J2000) (Mpc) (mag) ($L_{\odot}$) (cm-2) ($L_{\odot}$) (deg) (kpc) (erg/s) (erg/s)

SABc		 $12^{\rm h} 45^{\rm m} 09^{\rm s}$ $-00^{\circ} 27^{\prime} 38^{\prime\prime}$ 26.3 10.68 10.76 20.23 10.69 $80^{\circ}$ 17.5 40.20 40.40
(a) Morphological type, from RC3 (de Vaucouleurs et al. 1991).

(b) RA(2000) and Dec(2000), from RC3 (de Vaucouleurs et al. 1991).

(c) Distance, from Dahlem et al. (1997).

(d) Total B-magnitude, corrected for Galactic and internal extinction, from RC3 (de Vaucouleurs et al. 1991).

(e) B-band luminosity, derived using the quoted distance and B-magnitude.

(f) Galactic HI column density (Dickey & Lockman 1990).

(g) Far-infrared (FIR) luminosity (from Dahlem et al. 1997). The FIR flux is defined (Helou et al. 1985) as a combination of the IRAS $60~\mu$m and $100~\mu $m fluxes according to $f_{\rm FIR} \equiv 1.26 \times 10^{-11} (2.58~ f_{60} + f_{100})$ erg s-1 cm-1, where f60 and f100 are expressed in Jy.

(h) Inclination angle with respect to line of sight (Dahlem et al. 1998).

(i) 25-B-mag photometric radius, corrected for inclination and Galactic absorption, derived using the angular value given by RC3 (de Vaucouleurs et al. 1991) and the quoted distance.

(j) 0.5-2 keV luminosity, derived using the quoted distance and the data presented in this paper. Not corrected for Galactic absorption.

(k) 2-10 keV luminosity, derived using the quoted distance and the data presented in this paper. Not corrected for Galactic absorption.


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