Polarization Observables for $\gamma p\rightarrow K^{+}\Lambda$ using polarized photons on a longitudinally polarized target*

The latest highlights of the $N^\ast$ program at Jefferson Lab were photo-production experiments using frozen-spin targets inside the CLAS detector. All combinations of beam-target double-polarization observables were obtained for multiple reactions. Thanks to the self-analyzing properties of $\Lambda$ all possible polarization observables for $K^{+}\Lambda$ are being extracted from the data resulting in a complete determination of the $K\Lambda$ amplitude, thus a least model-dependent determination of any resonances coupling to this channel. This talk will discuss the results of the first run period in 2007/2008 with longitudinally polarized frozen-spin target for this reaction: the beam-target asymmetries $E$ and $G$ as well as the target-recoil asymmetries $L_{x'}$ and $L_{z'}$.