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The RHEA spectrograph is an instrument currently under development at Macquarie University in Sydney and is expected to relocate to MSO later this year. The instrument was built to be capable of long-baseline radial velocity (RV) observations on small telescopes, with the long baseline allowing for easier separation of a potential planet’s RV signal from that of the stellar pulsations of its host star. This talk will detail one of the planned improvements for RHEA, an upgraded optical fibre feed connecting RHEA to the telescope, along with associated simulations and the short term goals of the spectrograph at MSO. The new feed is intended to substantially improve the throughput of the telescope-spectrograph system through the use of Phase Induced Amplitude Apodization (PIAA), a beam shaping technique, and a multi-fibre Integral Field Unit (IFU) using a microlens array and single mode fibres (SMF). |
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