Jan 8, 2013
#galaxy cluster PKS 0745-19 #ultramassive black hole #supermassive black hole #galaxy survey #elliptical galaxy #Chandra X-ray Observatory #x-ray telescope #Hubble Space Telescope #mass of the sun #NSF #Karl G. Jansky Very Large Array #JVLA #Australia Telescope Compact Array #ATCA #infrared data #2 Micron All-Sky Survey #2MASS #Monthly Notices of the Royal Astronomical Society #NASA #astronomy