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    Chapter

    Superluminal Expansion of 3C 273

    Figure 1 shows hybrid maps of the core of 3C 273B at five epochs, made with arrays of 4 or 5 VLBI antennas. The maps span a period of 3.5 years. They all show a bright eastern peak and a lower-brightness exten...

    T. J. Pearson, S. C. Unwin, M. H. Cohen, R. P. Linfield… in Extragalactic Radio Sources (1982)

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    Chapter and Conference Paper

    The Big Optical Array

    The Naval Research Laboratory and the US Naval Observatory are building a phase tracking optical interferometer for high resolution imaging and astrometry. This instrument will be a six element interferometer ...

    R. S. Simon in Very High Angular Resolution Imaging (1994)