Fig. 1

Left: distribution of distance and proper motion. The major
concentration of the UMa group is the UMa open cluster in the Big Dipper constellation
at distances of about 25
pc. All known members and candidates (see references in the text) are
included in the histogram (solid line; distances mostly from Montes et al. 2001 and van Leeuwen
2007). We add the distribution of the southern stars within 30 pc addressed
in the present work (hatched; distances from van
Leeuwen 2007). Right: image of the coronagraphic mask with
the four coronagraphs (black filled circles) taken with the S27 camera. Each of the
coronagraphs has an angular diameter of . We placed the star below the
lower left (south-eastern) coronagraph, so that a field with a
radius of ≈9′′
is completely covered outside the coronagraph (hatched circle). Incomplete coverage is
achieved up to separations of ≈25′′
(arrow).
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