High-energy replicated optics
Ballon-born telescope
From Wikipedia, the free encyclopedia
High-energy replicated optics (HERO) is a high-altitude balloon-borne x-ray telescope based at the Marshall Space Flight Center. Its mirrors are conical approximations to Wolter type 1 geometry.[1] The proving flight, at least, used a high-pressure gas scintillation proportional counter with relatively low spatial resolution.

Focal length6 m (19 ft 8 in)
| Focal length | 6 m (19 ft 8 in) |
|---|---|
| Website | wwwastro |