@misc{boffin2020exposure,
  title={ESO's Exposure Time Calculator 2.0},
  author={Henri M. J. Boffin and Jakob Vinther and Lars K. Lundin and Gurvan Bazin},
  year={2020},
  eprint={2012.09860},
  archivePrefix={arXiv},
  primaryClass={astro-ph.IM},
  doi={10.1117/12.2562236},
  url={https://arxiv.org/abs/2012.09860}
}