Evidence for candidate X-ray pulsations from the ultraluminous X-ray source NGC 7456 ULX-1

Yuanle Yao, Xiang-Dong Li, Xiao-Jie Xu

We report evidence for a candidate pulsational signal at $\sim 0.22$~Hz from NGC7456 ULX-1, a previously identified ultraluminous X-ray source (ULX). The signal is identified in the…