CALIBRATION OF THE NuSTAR HIGH-ENERGY FOCUSING X-RAY TELESCOPE

Fast optical metrology of the hard x-ray optics for the High Energy Focusing Telescope (HEFT) †

We describe a fast figure metrology system designed for the several thousand mirror quadrants in the High Energy Focusing Telescope (HEFT) balloon experiment. HEFT's multilayer coated hard x-ray optics will have ~ 1 arcminute HEW and operate at 20-80 keV. The optics are a conical approximation to the Wolter-I configuration. Our automated system can measure the axial figure error, in-phase and o...

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چکیده ندارد.

NuSTAR detection of high-energy X-ray emission and rapid variability from sagittarius

Sagittarius A harbors the supermassive black hole that lies at the dynamical center of our Galaxy. Sagittarius A spends most of its time in a low luminosity emission state but flares frequently in the infrared and X-ray, increasing up to a few hundred fold in brightness for up to a few hours at a time. The physical processes giving rise to the X-ray flares are uncertain. Here we report the dete...

NuSTAR detection of high-energy X-ray emission and rapid variability from Sagittarius A flares

Sagittarius A⋆ harbors the supermassive black hole that lies at the dynamical center of our Galaxy. Sagittarius A⋆ spends most of its time in a low luminosity emission state but flares frequently in the infrared and X-ray, increasing up to a few hundred fold in brightness for up to a few hours at a time. The physical processes giving rise to the X-ray flares are uncertain. Here we report the de...

NuSTAR Observations of X-Ray Binaries