The PRAXIS project was completed in 2019. It successfully demonstrated OH suppression using single-mode fibre Bragg gratings from the GNOSIS prototype coupled to the PRAXIS spectrograph with a new H2RG detector at the Anglo-Australian Telescope (AAT). The instrument did not measure a deep interline background, however, because of excess background radiation within the instrument.
A new project called Eupraxia has commenced to reconfigure the PRAXIS instrument, combining the spectrograph and detector in a single Dewar and re-optimising the internal cold baffling, to build a new front end injection system, build a low temperature system for the GNOSIS FBG unit, and to install and test this complete system at the Very Large Telescope (VLT). This project will involve Astralis (Australia) and AIP (Germany).
