58 citations · 74 across the 2 of their papers we have counts for
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David Pooley, Saul Rappaport
Ultraluminous X-ray sources (ULXs) with 10^39 < L_x < 10^41 erg/s have been discovered in great numbers in external galaxies with ROSAT, Chandra, and XMM-Newton. The central questi…