Commissioning and In-flight Calibration of the Nuclear Spectroscopic Telescope Array (NuSTAR)

The Nuclear Spectroscopic Telescope Array is the first focusing hard X-ray (3-79 keV) observatory in orbit. NuSTAR's two co-aligned X-ray telescopes incorporate depth-graded multilayer coated optics and solid state CdZnTe pixel detectors with a 10-m focal length. In its first two months in orbit NuSTAR completed a number of cross calibration observations with other missions, notably Suzaku and XMM. In the poster we describe the commissioning of the NuSTAR observatory, and the status of the NuSTAR internal and cross calibrations.