The Hunt for Pulsating Ultraluminous X-ray Sources
The Hunt for Pulsating Ultraluminous X-ray Sources
Abstract Motivated by the recent discoveries that six Ultraluminous X-ray Sources (ULXs) are powered by highly super-Eddington X-ray pulsars, we searched for additional pulsating ULX (PULX) candidates by identifying sources that exhibit long-term flux variability of at least an order of magnitude (a common feature seen in the 6 known …