ART-XC Mission Update

We present an overview of the Astronomical Roentgen Telescope - X-ray Concentrator (ART-XC) instrument on board the Spectrum-Roentgen-Gamma (SRG) mission currently scheduled for launch in 2019. ART-XC is an X-ray grazing incidence mirror telescope array developed by the Space Research Institute (IKI) and the All-Russian Scientific Research Institute for Experimental Physics (VNIIEF). NASA's Marshall Space Flight Center (MSFC) developed and fabricated the X-ray mirrors. ART-XC is composed of seven mirror modules co-aligned with seven CdTe double-sided strip focal plane detectors. ART-XC will operate over the energy range of 4-30 keV, with an angular resolution of <1‧, a field of view of ~0.3 square degree and an expected energy resolution of about 9% at 14 keV. The ART-XC primary mission will be to perform a four-year all-sky survey simultaneously with the other SRG instrument, eROSITA, followed by three years of pointed observations.