... effects

Based on observations collected at the European Southern Observatory, La Silla, Chile and at the Canada-France-Hawaii Observatory, Hawaii, USA.

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...

Appendix is only available in electronic form at http://www.edpsciences.org

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... software

See http://www.oamp.fr/adhoc/adhoc.html

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...1994)

A faint HI tidal extends much further than the optical counterpart.

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... matter

A precise value of M/L cannot be given without studying in detail the stellar population of the system; however the mass is dominated by the HI component.

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... Gallery

Available at http://www.nrao.edu/astrores/HIrogues/

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