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LOFAR discovery of a radio halo in the high-redshift galaxy cluster PSZ2 G099.86+58.45
(2019-08-19)
In this Letter, we report the discovery of a radio halo in the high-redshift galaxy cluster PSZ2 G099.86+58.45 ($z=0.616$) with the LOw Frequency ARray (LOFAR) at 120-168 MHz. This is one of the most distant radio halos ...