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    Chapter and Conference Paper

    Proper Motions of H2O Masers in W49(N) and the Distance to the Galactic Center

    A distance of R 0 = 7.6 ±1.6 kpc for the galactic center is given by comparison of expansion parallax of a cluster of H2O masers in W49(N) with the kinematic distance of that source. Data from add...

    C. R. Gwinn, J. M. Moran, M. J. Reid, M. H. Schneps, R. Genzel… in The Center of the Galaxy (1989)