ABORAS: polarimetric, 10cm/s RV observations of the Sun as a star

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We present a description of A dual-Beam polarimetric Robotic Aperture for the Sun (ABORAS), to serve as a Solar input with a dedicated Stokes V polarimeter for the HARPS3 high-resolution spectrograph. ABORAS has three main science drivers: trying to understand the physics behind stellar variability, tracking the long term stability of HARPS3, and serve as a benchmark for Earth-sized exoplanet detection with HARPS3 by injecting an Earth RV signal into the data. By design, ABORAS will (together with the HARPS3 instrument) be able to measure 10cm/s variations in RV of the integrated Solar disk and detect integrated magnetic field levels at sub 1 Gauss level through circularly polarized light.

Original languageEnglish
Title of host publicationGround-based and Airborne Telescopes IX
EditorsHeather K. Marshall, Jason Spyromilio, Tomonori Usuda
PublisherSociety of Photo-Optical Instrumentation Engineers
ISBN (Electronic)9781510653450
Publication statusPublished - 29 Aug 2022
EventSPIE Astronomical Telescopes + Instrumentation 2022 - Montreal, Canada
Duration: 17 Jul 202222 Jul 2022

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceSPIE Astronomical Telescopes + Instrumentation 2022
Internet address

Bibliographical note

Funding Information:
The authors would like to acknowledge the extensive lab support from collaborators at the NOVA Optical Infrared Instrumentation group in Dwingeloo and Observatory of Geneva. This work was supported by the Swiss National Science Foundation and the Kavli Institute for Cosmology in Cambridge. The authors acknowledge the financial support of the SNSF and KICC.

Publisher Copyright:
© 2022 SPIE.


  • High resolution spectroscopy
  • Solar physics
  • exoplanets
  • polarimetry
  • radial velocity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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