Vogt, Frédéric P.A.Martinache, FrantzGuyon, OlivierYoshikawa, TakashiYokochi, KaitoGarrel, VincentMatsuo, Taro2022-02-092022-02-09June 27-Ju97808194822660277-786Xhttp://hdl.handle.net/1885/259907The Subaru Coronagraphic Extreme AO project (SCExAO) is a high performance coronagraph designed to deliver high contrast at small angular separation. For the detection of structures near the diffraction limit, an accurate control of low order wavefront aberrations - tip-tilt and focus - is essential as these aberrations create light leaks that are the source of confusion in the final science image. To address this major difficulty, we have equipped SCExAO with a specially designed Coronagraphic Low Order WaveFront Sensor (CLOWFS) using defocused images of a reflective ring located in the focal plane, that can track tip-tilt errors as small as 10-3?/D. CLOWFS was originally designed to drive actuators in a closed-loop. Here, we show that it can also be used in post-processing to efficiently subtract the tip-tilt induced coronagraphic leaks in the final science image.application/pdfen-AU© 2010 SPIECLOWFSCoronographyExtra solar planetsPIAASCExAOSubaru telescopesAdaptive opticsOptical telescopesSensorsWavefrontsPlanets Adaptive opticsCLOWFSCoronographyExtrasolar planetsPIAASCExAOSubaru telescope201010.1117/12.8579152020-12-13