Updated discussion of LISA (eLISA, gLISA, and LISA Pathfinder launch date); added Tinto et al. (2014) reference. Removed last paragraph on further possible implications for LISA, thus needed to omit the Synthetic LISA reference (Vallisneri, 2005).
Updated discussion of LISA (eLISA, gLISA, and LISA Pathfinder launch date); added Tinto et al. (2014) reference. Removed last paragraph on further possible implications for LISA, thus needed to omit the Synthetic LISA reference (Vallisneri, 2005).