Abstract :
After a relatively small hardware modification, the VST is becoming the first wide-field polarimetric optical survey telescope, VSTPOL, without affecting the current capabilities of the VST+OmegaCAM system. Scientific cases include: 3D mapping of the magnetic fields of the Milky-Way and Magellanic clouds,
surveys of quasar polarization, polarimetric characterization and mapping of solar-system objects, follow-up of CTA sources and transients, polarisation measurements of bright transients identified by transient factories, such as bright gamma-ray burst afterglows, supernovae, etc.
