Changes in the X-ray irradiation of an ultraluminous X-ray source

Optical emission observed from ultraluminous Xray sources (ULXs) comes from theirradiated disk and the donor star. Disentangling the two components has alwaysbeen an unsolved problem. We have discovered that the ULX NGC 1313 X2 switchesbetween two distinct Xray spectral/luminosity states on long timescales, virgul610 weeks. This makes it an ideal laboratory to study the effects of variableXray irradiation on the disk and donor star. We propose a multiband study ofNGC 1313 X2 from nearIR to Xrays, with XMM, HST and Swift. We will measurethe contribution of Xray reprocessing to the optical emission and determinewhether irradiation correlates with disk winds. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]

从超 luminous X射线源（ULXs）观测到的光发射源自其辐射盘和供星。将这两部分分离一直是未解之谜。我们发现NGC 1313 X2型ULX在长达610周的时间尺度上，在两种不同的X射线光谱/光度状态之间切换。这使得它成为研究可变X射线辐照对盘和供星影响的理想实验室。我们提议对NGC 1313 X2进行从近红外到X射线的多波段研究，使用XMM、HST和Swift进行观测。我们将测量X射线再处理对光学发射的贡献，并确定辐照是否与盘风相关。请注意，以下内容被截断，请查阅实际数据以获取完整文本[内容被截断，请查阅实际数据以获取完整文本]。