The spring 2001 balloon flight from the National Scientific Balloon Facility
in Ft. Sumner, NM completed May 24, 2001. Three hard X-ray astronomical objects, the Crab Nebula and Pulsar (left), Cygnus X-1 (below left), and GRS 1915 (below right)
were successfully imaged during the flight. The balloon
reached an altitude of 128,000 ft, well above most of Earth's X-ray-absorbing
These images represent the first successful hard X-ray focussing optics experiment,
part of the HERO High Energy Replicated Optics program, ever achieved. Here is the
NASA press release story.