https://publications-cnrc.canada.ca/eng/view/object/?id=afc0dd99-fb3a-435e-bda1-7ce690c5be4e
An ultrasoft X-ray flare from 3XMM J152130.7+074916: a tidal disruption event candidate - NRC...
An ultrasoft X-ray flare from 3XMM J152130.7+074916: a tidal disruption event candidate