SPARC4: A Simultaneous Polarimeter and Rapid Camera in 4 Bands
  We present the basic concept of a new astronomical instrument: SPARC4 - Simultaneous Polarimeter and Rapid Camera in 4 bands. SPARC4 combines in one instrument: (i) photometric and polarimetric modes; (ii) sub-second time-resolution in photometric mode and excellent time-resolution in polarimetric mode; (iii) simultaneous imaging in four broad-bands for both modes. This combination will make SPARC4 a unique facility for ground-based optical observatories. Presently, the project is in its conceptual design phase. 
C. V. Rodrigues, F. J. Jablonski, K. Taylor, T. Dominici, R. Laporte,   A. Pereyra, C. Strauss, A. M. Magalhaes, M. Assafin,...
astro-ph.IM