In NGC 1559, four ULXs now have identified optical companions, with X-14 and X-24 emission coming from donor stars and X-1 and X-18 from accretion disks.
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Unveiling the nature of donor stars of ULXs in NGC 1559
In NGC 1559, four ULXs now have identified optical companions, with X-14 and X-24 emission coming from donor stars and X-1 and X-18 from accretion disks.