Ultra-luminous X-ray sources (ULXs) are a class of extra-galactic, point-like, off-nuclear X-ray sources with X-ray luminosity from ∼1039~erg s−1 to 1041~erg s−1. We investigated the temporal and broadband X-ray spectral properties of the ULX M81~X--6 using simultaneous \textit{Suzaku} and \textit{NuSTAR} observations. To understand the nature of the source, we searched for pulsating signals from the source using the \textit{NuSTAR} observation. However, we failed to identify any strong pulsating signals from the source. Alternatively, the broadband spectral modelling with accreting magnetic neutron star continuum model provides a statistically acceptable fit, and the inferred spectral parameters and X-ray colours are consistent with other pulsating ULXs. Thus, our analysis suggests that M81~X--6 is another candidate ULX pulsar.
@article{arxiv.2004.01796,
title = {Broadband X-ray Spectral Study of Ultra-luminous X-ray Source M81 X--6},
author = {V. Jithesh and C. Anjana and Ranjeev Misra},
journal= {arXiv preprint arXiv:2004.01796},
year = {2020}
}
Comments
Accepted for Publication in MNRAS, 6 Pages, 4 Figures, 1 Table