Astronomy and Astrophysics – Astrophysics – Instrumentation and Methods for Astrophysics
Scientific paper
2010-10-03
Astronomy and Astrophysics
Astrophysics
Instrumentation and Methods for Astrophysics
To be published in ASP Conf Series, Solar Polarization Workshop 6
Scientific paper
We recently commissioned the polarimetric upgrade of the HARPS spectrograph at ESO's 3.6-m telescope at La Silla, Chile. The HARPS polarimeter is capable of full Stokes spectropolarimetry with large sensitivity and accuracy, taking advantage of the large spectral resolution and stability of HARPS. In this paper we present the instrument design and its polarimetric performance. The first HARPSpol observations show that it can attain a polarimetric sensitivity of ~10^-5 (after addition of many lines) and that no significant instrumental polarization effects are present.
Dolgopolov Andrey
Jeffers Sandra
Johns-Krull Christopher
Keller Christoph
Kochukhov Oleg
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