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We select a close "major-merger candidate" galaxy pair sample in order to calculate the K s luminosity function (LF) and pair fraction representative of the merger/interaction component of galaxy evolution in the local universe. The pair sample (projected separation 5 h −1 kpc r 20 h −1 kpc, K s -band magnitude difference ΔK s 1 mag) is selected by combining the Two Micron All Sky Survey (2MASS) with the Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5). The resulting data set contains 340doi:10.1088/0004-637x/695/2/1559 fatcat:asq2tlb6g5a7jgwsp7rdnwrvha