Nuclear Spectroscopic Telescope Array (NuSTAR)

"The Nuclear Spectroscopic Telescope Array (NuSTAR), now scheduled for launch in 2011, will observe the cosmos in the poorly studied high-energy X-ray band. It is part of NASA's Small Explorer class of missions, which have a cost cap of $105 million, not including launch costs.
NuSTAR will carry out a census of black holes of all sizes, from small ones weighing a few times the mass of the Sun to 'supermassive' black holes weighing millions or billions of Suns.
NuSTAR should be able to spot some dust-shrouded black holes that other satellites like the Chandra X-ray Observatory cannot see. That's because NuSTAR detects X-rays with energies as high as 80,000 electronvolts (80 keV), which can penetrate dust that blocks lower-energy X-rays."
NASA resurrects cancelled black hole mission - space - 21 September 2007 - New Scientist Space
http://space.newscientist.com/article/dn12679-nasa-resurrects-cancelled-black-hole-mission.html