Veloce Rosso: Australia's new precision radial velocity spectrograph
Abstract
Veloce is an ultra-stable fibre-fed R4 echelle spectrograph for the 3.9 m Anglo-Australian Telescope. The first channel to be commissioned, Veloce `Rosso', utilises multiple low-cost design innovations to obtain Doppler velocities for sun-like and M-dwarf stars at <1 ms -1 precision. The spectrograph has an asymmetric white-pupil format with a 100-mm beam diameter, delivering R>75,000 spectra over a 580-930 nm range for the Rosso channel. Simultaneous calibration is provided by a single-mode pulsed laser frequency comb in tandem with a traditional arc lamp. A bundle of 19 object fibres ensures full sampling of stellar targets from the AAT site. Veloce is housed in dual environmental enclosures that maintain positive air pressure at a stability of +/-0.3 mbar, with a thermal stability of +/-0.01 K on the optical bench. We present a technical overview and early performance data from Australia's next major spectroscopic machine.
- Publication:
-
Ground-based and Airborne Instrumentation for Astronomy VII
- Pub Date:
- July 2018
- DOI:
- 10.1117/12.2312399
- arXiv:
- arXiv:1807.01938
- Bibcode:
- 2018SPIE10702E..0YG
- Keywords:
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- Astrophysics - Instrumentation and Methods for Astrophysics
- E-Print:
- Submitted to SPIE 10702