1520037

In recent years thanks to the study of the correlated X-ray/OIR fast variability in Low Mass X-ray Binaries (LMXRBs) a new window on jet physics was opened: thanks to the detection of the subsecond variability in the jet emission it has been possible to measure the jet speed and size. Sco X-1 is a Neutron star LMXRBs which shows dramatic X-ray variability linked to changes in the nature of the accretion inflow to which is also associated strong radio activity from the relativistic jet. Here we propose to observe Sco X-1 with INTEGRAL using high time resolution modes to be matched in strict simultaneity with HAWK-I@VLT. We will measure the jet speed and study how these jet properties vary and evolve in the different accretion regimes of the source. Coverage in other bands will be also asked with other telescope in other bands (i.e. VLA REM...). We ask to perform 2 observation of 100ks each. [truncated! Please see actual data for full text]