FIRST, the Fibered Imager foR a Single Telescope, is a spectro-imager using single-mode fibers for pupil remapping, allowing measurements beyond the telescope diffraction limit. Integrated on the Subaru Coronagraphic Extreme Adaptive Optics instrument at the Subaru Telescope, it benefits from a very stable visible light wavefront allowing to acquire long exposure and operate on significantly fainter sources than previously possible. On-sky results demonstrated the ability of the instrument to detect stellar companions separated 43mas in the case of the Capella binary system. A similar approach on an extremely large telescope would offer unique scientific opportunities for companion detection and characterization at very high angular resolution.
@article{arxiv.2012.12416,
title = {FIRST, a Pupil-Remapping Fiber Interferometer at the Subaru Telescope: on-sky results},
author = {Sébastien Vievard and Elsa Huby and Sylvestre Lacour and Kevin Barjot and Guillermo Martin and Nick Cvetojevic and Vincent Deo and Olivier Guyon and Julien Lozi and Takayuki Kotani and Nemanja Jovanovic and Franck Marchis and Guillaume Duchène and Vincent Lapeyrere and Daniel Rouan and Guy Perrin},
journal= {arXiv preprint arXiv:2012.12416},
year = {2020}
}