Oral title: First results with the L-band vortex coronagraph at Keck/NIRC2

Oral abstract: In this talk we will report on the first results obtained during the recent commissioning of the L-band vortex 
coronagraph on Keck/NIRC2 and review the on-sky performance of this new mode. We will present our results using the VIP data 
reduction pipeline, including the detection of the inner most of the three rings in the HD141569 A protoplanetary disk and of the 
spiral arms of MWC 758.