@conference {23855,
	title = {A unique UV flare in the optical light curve of the quasar J004457.9+412344},
	volume = {39},
	year = {2012},
	month = {2012/12/1},
	pages = {08001},
	abstract = {We found that the nova candidate J004457.9+412344 is a radio-quiet quasar at z \~{} 2. Its optical long-term light curve, covering more than half a century, shows quasar typical flux variations superimposed by a spectacular single flare lasting more than one year (observer frame). We could not find comparable light curves among the several thousand catalogued radio-quiet quasars in the stripe 82 of the Sloan Digital Sky Survey. The decreasing part of the flare light curve roughly follows a power law t<SUP>-5/3</SUP>. The quasar spectrum, the total energy of the flare, and the decline of the light curve are consistent with the tidal disruption of a \~{}10 M<SUB>ʘ</SUB> giant star by a supermassive black hole of a few 10<SUP>8</SUP> M<SUB>ʘ</SUB>. We argue that the alternative explanation by gravitational microlensing is less likely, though it cannot be definitely excluded.},
	url = {https://ui.adsabs.harvard.edu/abs/2012EPJWC..3908001M},
	author = {Meusinger, H. and Henze, M. and Birkle, K. and Pietsch, W. and Williams, B. and Hatzidimitriou, D. and Nesci, R. and Ertel, S. and Hinze, A. and Bertold, T. and Kaminsky, B.}
}
