The 2M++ galaxy redshift catalogue
  Peculiar velocities arise from gravitational instability, and thus are linked
to the surrounding distribution of matter. In order to understand the motion of
the Local Group with respect to the Cosmic Microwave Background, a deep all-sky
map of the galaxy distribution is required. Here we present a new redshift
compilation of 69~160 galaxies, dubbed 2M++, to map large-scale structures of
the Local Universe over nearly the whole sky, and reaching depths of K <= 12.5,
or 200 Mpc/h. The target catalogue is based on the Two-Micron-All-Sky Extended
Source Catalog (2MASS-XSC). The primary sources of redshifts are the 2MASS
Redshift Survey, the 6dF galaxy redshift survey and the Sloan Digital Sky
Survey (DR7). We assess redshift completeness in each region and compute the
weights required to correct for redshift incompleteness and apparent magnitude
limits, and discuss corrections for incompleteness in the Zone of Avoidance. We
present the density field for this survey, and discuss the importance of
large-scale structures such as the Shapley Concentration.
