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The 500 ks <i>Chandra</i> observation of the <i>z</i> = 6.31 QSO SDSS J1030 + 0524
We present the results from a $\sim500$ ks Chandra observation of the $z=6.31$ QSO SDSS J1030+0524. This is the deepest X-ray observation to date of a $z\sim6$ QSO. The QSO is detected with a total of 125 net counts in the full ($0.5-7$ keV) band and its spectrum can be …