\begin{table}%t1 %\centering \par \caption{Basic properties of the examined galaxies. (1) \citet[][]{Vaucouleurs91}; (2) \citet[][]{Freedman01}; (3) This work; (4) NED; (5) LEDA \citep[][]{LEDA}. \label{Tab_3.1}} \begin{tabular}{llrrrr} \hline \hline Descr. & Par. & NGC~2541 & UGC~3580 & NGC~5204 & Ref. \\ \hline Classification of galaxy & Type & SA(s)cd & SA(s)a & SA(s)m & (1) \\ Right Ascension (J2000) (NED) & RA & $ \hmsm{08}{14}{40}{07} $ & $ \hmsm{06}{55}{30}{86} $ & $ \hmsm{13}{29}{36}{51} $ & (4) \\ Declination (J2000) (NED) & Dec & $ \dmsm{+49}{03}{41}{2} $ & $ \dmsm{+69}{33}{47}{0} $ & $ \dmsm{+58}{25}{07}{4} $ & (4) \\ Optical heliocentric systemic velocity ($\rm km~s^{-1}$) & $V_{\rm sys}$ & $ 559.5 ~\pm~ 2.0 $ & $ 1200.1 ~\pm~ 2.0 $ & $ 200.8 ~\pm~ 2.0 $ & (3) \\ Distance of object ($\rm Mpc$) & $\rm D$ & $ 11.2 ~\pm~ 0.8 $ & $ 15.1 ~\pm~ 3.5 $ & $ 4.1 ~\pm~ 1.0 $ &(2,3) \\ Scale between distance on sky and true distance ($~^{\prime\prime}~{\rm pc}^{-1}$). & $sc$ & $ 54.4 ~\pm~ 3.9 $ & $ 73 ~\pm~ 17 $ & $ 20.0 ~\pm~ 4.8 $ & (3) \\ Apparent $B$-band magnitude ($\rm mag$). & $m_{\rm B}$ & $ 12.36 ~\pm~ 0.34 $ & $ 13.87 ~\pm~ 0.35 $ & $ 11.71 ~\pm~ 0.12 $ & (5) \\ Apparent $I$-band magnitude ($\rm mag$). & $m_{\rm I}$ & $ 10.86 ~\pm~ 0.06 $ & $ 11.55 ~\pm~ 0.08 $ & $ 9.79 ~\pm~ 0.10 $ & (5) \\ Extinction-corrected apparent $B$-band magnitude ($\rm mag$). & $m_{\rm B}^{\rm c}$ & $ 11.60 ~\pm~ 0.34 $ & $ 13.34 ~\pm~ 0.35 $ & $ 11.30 ~\pm~ 0.12 $ & (4) \\ Extinction-corrected apparent $I$-band magnitude ($\rm mag$). & $m_{\rm I}^{\rm c}$ & $ 10.57 ~\pm~ 0.07 $ & $ 11.25 ~\pm~ 0.09 $ & $ 9.71 ~\pm~ 0.10 $ & (3) \\ Absolute $B$-band magnitude ($\rm mag$). & $M_{\rm B}$ & $ -18.6 ~\pm~ 0.4 $ & $ -17.6 ~\pm~ 0.6 $ & $ -16.8 ~\pm~ 0.5 $ & (3) \\ Absolute $I$-band magnitude ($\rm mag$). & $M_{\rm I}$ & $ -19.7 ~\pm~ 0.2 $ & $ -19.6 ~\pm~ 0.5 $ & $ -18.4 ~\pm~ 0.5 $ & (3) \\ $B$-band luminosity ($ 10^9~ {L}_\odot $). & $L_{\rm B}$ & $ 4.5 ~\pm~ 1.6 $ & $ 1.64 ~\pm~ 0.92 $ & $ 0.81 ~\pm~ 0.39 $ & (3) \\ $I$-band luminosity ($ 10^9~ {L}_\odot $). & $L_{\rm I}$ & $ 3.20 ~\pm~ 0.50 $ & $ 3.1 ~\pm~ 1.5 $ & $ 0.96 ~\pm~ 0.46 $ & (3) \\ Total {\ion{H}{i}} flux (${\rm Jy}~{\rm km}~{\rm s}^{-1}$). & $F_{\rm {\ion{H}{i}}}$ & $ 142 ~\pm~ 15 $ & $ 41.6 ~\pm~ 4.2 $ & $ 135 ~\pm~ 14 $ & (3) \\ {\ion{H}{i}} mass ($10^9~{M}_\odot$). & $M_{\rm {\ion{H}{i}}}$ & $ 4.23 ~\pm~ 0.74 $ & $ 2.2 ~\pm~ 1.1 $ & $ 0.54 ~\pm~ 0.27 $ & (3) \\ $B$-band optical radius ($~^{\prime\prime}$). & $r_{25}$ & $ 173 ~\pm~ 61 $ & $ 97 ~\pm~ 28 $ & $ 140 ~\pm~ 10 $ & (5) \\ {\ion{H}{i}} radius ($~^{\prime\prime}$). & $r_{\rm {\ion{H}{i}}}$ & $ 420 ~\pm~ 30 $ & $ 240 ~\pm~ 30 $ & $ 240 ~\pm~ 30 $ & (3) \\ Terminal radius ($~^{\prime\prime}$). & $r_{\rm t}$ & $ 590 ~\pm~ 30 $ & $ 375 ~\pm~ 30 $ & $ 420 ~\pm~ 30 $ & (3) \\ $B$-band optical radius ($\rm kpc$). & $R_{25}$ & $ 9.39 ~\pm~ 0.67 $ & $ 7.1 ~\pm~ 1.7 $ & $ 2.82 ~\pm~ 0.66 $ & (5) \\ {\ion{H}{i}} radius ($\rm kpc$). & $R_{\rm {\ion{H}{i}}}$ & $ 22.9 ~\pm~ 1.7 $ & $ 17.6 ~\pm~ 4.1 $ & $ 4.8 ~\pm~ 1.2 $ & (3) \\ Terminal radius ($\rm kpc$). & $R_{\rm t}$ & $ 32.1 ~\pm~ 2.3 $ & $ 27.5 ~\pm~ 6.4 $ & $ 8.4 ~\pm~ 2.0 $ & (3) \\ Rotation velocity at terminal radius (${\rm km}~{\rm s}^{-1}$). & $V_{\rm t}$ & $ 127 ~\pm~ 25 $ & $ 121 ~\pm~ 17 $ & $ 105 ~\pm~ 25 $ & (3) \\ Rotation period at terminal radius (${\rm Gyr}$). & $t_{\rm t}$ & $ 1.55 ~\pm~ 0.04 $ & $ 1.39 ~\pm~ 0.04 $ & $ 0.49 ~\pm~ 0.03 $ & (3) \\ Dynamical mass ($10^9~{M}_\odot$). & $M_{\rm dyn}$ & $ {>} 121 ~\pm~ 49 $ & $ >\ 94 ~\pm~ 34 $ & $ >$$ 22 ~\pm~ 12 $ & (3) \\ Ratio of {\ion{H}{i}} mass and $B$-band luminosity (${M}_\odot~{L}_\odot^{-1}$). & $\frac{M_{\rm {\ion{H}{i}}}}{L_{\rm B}}$ & $ 0.9 ~\pm~ 0.2 $ & $ 1.4 ~\pm~ 0.23 $ & $ 0.7 ~\pm~ 0.07 $ & (3) \\ Ratio of {\ion{H}{i}} mass and $I$-band luminosity (${M}_\odot~{L}_\odot^{-1}$). & $\frac{M_{\rm {\ion{H}{i}}}}{L_{\rm I}}$ & $ 1.3 ~\pm~ 0.2 $ & $ 0.7 ~\pm~ 0.08 $ & $ 0.6 ~\pm~ 0.06 $ & (3) \\ Ratio of dynamical mass and {\ion{H}{i}} mass. & $\frac{M_{\rm dyn}}{M_{\rm {\ion{H}{i}}}}$ & $ {>} 29 ~\pm~ 4 $ & $ {>} 42 ~\pm~ 12 $ & $ >$$ 40 ~\pm~ 11 $ & (3) \\ Ratio of dynamical mass and $B$-band luminosity (${M}_\odot~{L}_\odot^{-1}$). & $\frac{M_{\rm dyn}}{L_{\rm B}}$ & $ >$$ 27 ~\pm~ 12 $ & $ >$$ 57 ~\pm~ 23 $ & $ {>} 27 ~\pm~ 15 $ & (3) \\ Ratio of dynamical mass and $I$-band luminosity (${M}_\odot~{L}_\odot^{-1}$). & $\frac{M_{\rm dyn}}{L_{\rm I}}$ & $ {>} 38 ~\pm~ 16 $ & $ {>} 30 ~\pm~ 12 $ & $ {>} 23 ~\pm~ 13 $ & (3) \\ \hline \end{tabular} \end{table}