Table 1: NGC 4636 basic data compiled from the literature (1) NED, (2) Tonry et al. (2001), (3) this work, (4) R3C, (5) Dirsch et al. (2005), (6) Bender et al. (1994), (7) Idiart et al. (2003), (8) Forman et al. (1985), and (9) Loewenstein et al. (2001).
Other names UGC 07878, VCC 1939  
Position (J2000) $12~\hbox{$.\!\!^{\rm h}$ }~ 42~ \hbox{$.\!\!^{\rm m}$ }~50~ \hbox{$.\!\!^{\rm s}$ }$ $+02~ \hbox{$.\!\!^\circ$ }41 \hbox{$.\mkern-4mu^\prime$ }17 \hbox{$.\!\!^{\prime\prime}$ }$ (1)
Galactic coordinates $ l=297.75^\circ$ $b = 65.47^\circ$  
SBF distance modulus $(m-M)= 30.83\pm 0.13$ (2)
Distance $D=15~{\rm Mpc}$  
Scale 1 $^{\prime\prime}$ = 73 pc$\quad$ 1$^\prime $ = 4.4 kpc  
GCLF distance modulus $(m-M)= 31.24\pm 0.17$ (5)
Heliocentric velocity $\varv_{{\rm helio}}= 906 \pm7~{\rm km~s}^{-1}$ (3)
Hubble type E0+ (4)
Ellipticity $\epsilon = 0.15$ (6)
Position angle $PA=145^\circ$ (5)
Effective radius ${R_{{\rm e}}}=101\hbox{$.\!\!^{\prime\prime}$ }~7~({=}7.5~{\rm kpc})$ (7)
Blue magnitude $B_{\rm {T}}=10.43 $ (4)
Total apparent magnitude T1 $=8.70\pm 0.05$ (5)
Metallicity $[{\rm Fe/H} ] = -0.01$ dex (7)
X-ray luminosity $L_{{\rm X}}=1.78\pm 0.10\times\!10^{~41}~{\rm erg/s}$ (8)
Nuclear X-ray emission $\leq$ $2.7\times 10^{~38}~{\rm erg/s}$ (9)

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