New Horizons Observations of the Cosmic Optical Background

@article{Lauer2020NewHO,
  title={New Horizons Observations of the Cosmic Optical Background},
  author={Tod R. Lauer and Marc Postman and H. Weaver and John R. Spencer and S. Alan Stern and Marc W. Buie and Daniel D. Durda and Carey M. Lisse and Andrew Reinhold Poppe and Richard P. Binzel and Daniel T. Britt and Bonnie J. Buratti and Andrew Cheng and William M. Grundy and Mih{\'a}ly Hor{\'a}nyi and J. J. Kavelaars and Ivan R. Linscott and William B. McKinnon and Jeffrey M. Moore and Jorge I. N{\'u}{\~n}ez and Cathy B. Olkin and Joel Wm. Parker and Simon B. Porter and Dennis C. Reuter and Stuart J. Robbins and Paul M. Schenk and Mark R. Showalter and Kelsi N. Singer and Anne J. Verbiscer and Leslie A. Young},
  journal={The Astrophysical Journal},
  year={2020},
  volume={906}
}
We used existing data from the New Horizons Long-range Reconnaissance Imager (LORRI) to measure the optical-band (0.4 ≲ λ ≲ 0.9 μm) sky brightness within seven high–Galactic latitude fields. The average raw level measured while New Horizons was 42–45 au from the Sun is 33.2 ± 0.5 nW m−2 sr−1. This is ∼10× as dark as the darkest sky accessible to the Hubble Space Telescope, highlighting the utility of New Horizons for detecting the cosmic optical background (COB). Isolating the COB contribution… 
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