Cool Stars 14 - Submitted Abstract # 295 This version created on 05 October 2006 First High-Contrast Science with an IFU: the Sub-Stellar Companion to GQ Lup Michael McElwain, UC Los Angeles Stanimir Metchev, UC Los Angeles James Larkin, UC Los Angeles Matthew Barczys, UC Los Angeles Jason Weiss, UC Los Angeles Shelley Wright, UC Los Angeles Alfred Krabbe, University of Cologne Christof Iserlohe, University of Cologne Andreas Quierrenbach, University of Heidelberg We present high-contrast integral field spectroscopy with Keck AO+OSIRIS of the young star GQ Lup and its close-in sub-stellar companion - claimed to be the first, and only, planet directly imaged around a hydrogen-burning star. By enabling two-dimensional sampling of the bright halo of the primary, OSIRIS allows us to accurately estimate the host-star contamination in the spectrum of the sub-stellar companion - an otherwise challenging task for conventional AO slit spectroscopy in the constrast-limited regime. Our OSIRIS spectra do not confirm the planetary-mass status of GQ Lup B. However, we suggest an approach for improving the sensitivity of conventional AO surveys for sub-stellar companions using integral field spectroscopy. ----------------------------------