094365

We propose a new intense monitoring campaign consisting of 12x60 ksec XMM-Newtonobservations coordinated with 6 x40 ksec NuSTAR exposures of MCG -03- 58-007which is a powerful and extremely variable disk wind. Past X-ray observations ofthis remarkable wind revealed a dramatic and fast variability of the velocity ofthe disk wind which dropped from v/c~-0.2 to v/c~-0.074 in just 16 days. Suchvariability is at odds with other disk winds and challenging for current modelsand therefore it deserves a further investigation. With the new observations wewill: (i) confirm the velocity variations and their timescales (ii) probe thepresence of multiple velocity components and (iii) investigate the windacceleration mechanism. [truncated! Please see actual data for full text]