(Nuclear Spectroscopic Telescope Array)
(space telescope for high-energy X-rays)
NuSTAR (Nuclear Spectroscopic Telescope Array)
is a space-based X-ray telescope
launched by NASA in 2012 aiming at a 2-year (minimum) mission
to survey supermassive black holes.
It remains active in 2019.
NuSTAR is a Wolter telescope, a telescope focusing the X-rays
with grazing incident optics , i.e., reflecting only at small
angles from the reflecting surface, which gives a much better X-ray
signal-to-noise ratio. This contributes to its ability to sense higher energy
X-rays than previous missions. It has a 10-meter focal length,
using a 10-meter mast that unfolded with deployment.
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