089082

Fast radio bursts openParFRBsclosePar are millisecond pulses discovered at radio wavelengths. The number of FRB detections has increased rapidly in the last year comma culminating in the detection of bursts from a Galactic magnetar and the extragalactic source FRB180916 comma but the mechanism powering FRBs is still unknown. As the Galactic magnetar was detected at radio and hard X-ray wavelengths and theoretical models that associate these bursts with relatively long-lived openParseconds to minutesclosePar non-thermal radiation comma X-ray follow up is the most promising avenue to explore the spectral energy distribution of FRB emission. We propose a 20 ks NuSTAR-XMM-Newton observation coordinated with CHIME of the periodic FRB180916 during one of its aquestionMarkquestionMarkactiveaquestionMarkquestionMark phases when one or more high fluence radio bursts are expected.