091320

IGR J17407-2808 is an enigmatic and poorly studied X-ray binary with variability properties typical of the class of supergiant fast X-ray transients. Nevertheless it hosts a late type-F dwarf star which would classify it as a low-mass X-ray binary although its X-ray properties are very different from those of this class. We propose a simultaneous NuSTAR and XMM-Newton observation to perform the most sensitive spectral and timing study of this source on a wide X-ray band (0.2-79 keV). The X-ray observations will be accompanied by optical spectroscopic observations with X-sthooter and will enable us to collect information about IGR J17407-2808 fundamental to understand its nature and the X-ray emission mechanism that powers it. [truncated! Please see actual data for full text]