@article{Irwin_2016,
title={Ultraluminous X-ray bursts in two ultracompact companions to nearby elliptical galaxies},
volume={538},
ISSN={1476-4687},
url={http://dx.doi.org/10.1038/nature19822},
DOI={10.1038/nature19822},
number={7625},
journal={Nature},
publisher={Springer Science and Business Media LLC},
author={Irwin,
Jimmy A. and Maksym,
W. Peter and Sivakoff,
Gregory R. and Romanowsky,
Aaron J. and Lin,
Dacheng and Speegle,
Tyler and Prado,
Ian and Mildebrath,
David and Strader,
Jay and Liu,
Jifeng and Miller,
Jon M.},
year={2016},
month=oct,
pages={356–358} }