...Mrk 86

Visiting Astronomer (AGdP), Kitt Peak National Observatory, National Optical Astronomy Observatories, which is operated by the Association of Universities for Research in Astronomy, Inc. (AURA) under cooperative agreement with the National Science Foundation.

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...$M_B\ge-18^{\mathrm{m}}$)

For $H_0=75~{\rm km\,s}^{-1}~{\rm Mpc}^{-1}$ (Thuan & Martin 1981).

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...$\delta(2000)=+45\hbox{$^\circ$ }59\hbox{$^\prime$ }30.2\hbox{$^{\prime\prime}$ }$)

Center of the outer isophotes as measured in the R-band (see Sect. 4.1).

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... IRAF

IRAF is distributed by the National Optical Astronomy Observatories, which are operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation.

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... positions

The spectroscopic indexes have been measured using the REDUCEME package (Cardiel et al. 1998).

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