tokens: ACKNOWLEDGEMENTS We thank Marat Gilfanov for helpful comments. O.G. is supported by an NSF Astronomy and Astrophysics Fellowship under award AST-1602595. This work is based on data obtained with the NASA/ESA Hubble Space Telescope , all of which was obtained from MAST. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA.
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