Ultramassive Black Holes (NASA, Chandra, 12/18/12)

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Keywords: -ray, -sky, ., 0745-19, 2, 2mass, 2micronallskysurvey, array, astronomical, astronomy, atca, australia, australiatelescopecompactarray, black, chandra, chandraxrayobservatory, cluster, compact, data, elliptical, ellipticalgalaxy, galaxy, galaxyclusterpks074519, galaxysurvey, hole, holes, hubble, hubblespacetelescope, infrared, infrareddata, jansky, jvla, karl, karlgjanskyverylargearray, large, mass, massofthesun, micron, monthly, monthlynoticesoftheroyalastronomicalsociety, nasa, notices, nsf, observatory, pks, royal, society, space, sun, supermassive, supermassiveblackhole, survey, telescope, ultramassive, ultramassiveblackhole, xraytelescope