Markup centered on barline between staves

[Javier Ruiz-Alma]

I need to place markup between the staves, best centered at the barline.

How is this accomplished?

%%%%%%% BEGIN LILY CODE SNIPPET

\version "2.16.1"
<<
    \new staff {
        c''1
        \mark \markup{
            \override #'(baseline-skip . 1.5)
            \abs-fontsize #10
            \column{
                \halign #-1.3 "D.C."
                \concat{ "sin'al   " \raise #0.8  \musicglyph #"scripts.ufermata" }
            }
        }
        s1
    }
    \new staff { c''1 s1}
>>
%%%%%%%%%%% END LILY CODE SNIPPET