GRIF, the new 3D spectroscopic mode of the CFHT adaptive optics system:: Presentation and first results

GRIF is a new observing mode of PUEO, the CFHT adaptive optics system, and its near-infrared camera KIR. It is a K-band 3D spectrograph, made of an ambient-temperature Fabry-Perot and a cooled grism located inside the KIR cryostat. With a spectral resolution of 12000, the Fabry-Perot selects quasi-monochromatic images that are spatially dispersed by the grism. Masks supported by a focal-plane wheel in the cryostat prevent the overlapping of these images. Thus, GRIF combines a high angular resolution with spectroscopic capabilities. After the interferometer's installation in December 2000, we have obtained the first GRIF images in the OMC-1 region, in the H-2 v=1-0 S(1) line. More recently, two other observing modes of GRIF have been tested: the cronographic mode and the long-slit mode. The instrument and the first results from these observations have been presented at this conference.