Instrument Name:Narval
Telescope:Telescope Bernard Lyot
Telescope Aperture:2m
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Polarimetry Type:spectro polarimetry
Stokes Parameters:I Q U V
Wavelength Range:370-1000nm
Modulator Type:Achromatic Rotating Retarder
Modulator Type Other: Fresnel Rhombs
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Analyzer Type:Wollaston Prism
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Adaptive Optics:No
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Wavelength Range:370-1000nm
Spectral Resolution:65000
Limiting Magnitude:12
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Known Issues:1-3% crosstalk between Stokes parameters
Instrument Contact:R. Cabanac
Instrument Website: (French)
Planned Upgrades:Neo-Narval, stabilisation 3m/s
Science Description:Stellar Magnetism
Target Types:Stars
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Sample Science Papers:Donati, JF, et al., 2008, Magnetospheric accretion on the T Tauri star BP Tauri, 2008MNRAS.386.1234
Donati, JF, et al., 2008, Large-scale magnetic topologies of early M dwarfs, 2008MNRAS.390..545D ,
Aurière, M., et al., 2007, Weak magnetic fields in Ap/Bp stars. Evidence for a dipole field lower limit and a tentative interpretation of the magnetic dichotomy, 2007A&A...475.1053A ,
Donati, JF., et al. 2008, Magnetic cycles of the planet-hosting star τ Bootis, 2008MNRAS.385.1179D,
Donati, JF., et al., 2010, Magnetospheric accretion and spin-down of the prototypical classical T Tauri star AA Tau, 2010MNRAS.409.1347D,
Aurière, M., et al., 2009, Discovery of a weak magnetic field in the photosphere of the single giant Pollux, 2009A&A...504..231A,
Lignières, F., et al., 2009, First evidence of a magnetic field on Vega. Towards a new class of magnetic A-type stars, 2009A&A...500L..41L,
Aurière, M., et al., 2008, EK Eridani: the tip of the iceberg of giants which have evolved from magnetic Ap stars,2008A&A...491..499A,
Aurière, M., et al., 2010, The magnetic field of Betelgeuse: a local dynamo from giant convection cells?, 2010A&A...516L...2A ,
Fares, R., et al., 2009 Magnetic cycles of the planet-hosting star τ Bootis - II. A second magnetic polarity reversal, 2009MNRAS.398.1383F,
Alecian, E., et al., 2008 Characterization of the magnetic field of the Herbig Be star HD200775, 2008MNRAS.385..391A,
Bouret, JC, et al., 2008 The weak magnetic field of the O9.7 supergiant ζOrionisA,2008MNRAS.389...75B,
Martins, F, et al., 2010, Detection of a magnetic field on HD108: clues to extreme magnetic braking and the O phenomenon, 2010MNRAS.407.1423M,
Silvester, J., et al., 2009, On the incidence of magnetic fields in slowly pulsating B, β Cephei and B-type emission-line stars, 2009MNRAS.398.1505S,
Fares, R., et al., 2010, Searching for star-planet interactions within the magnetosphere of HD189733, 2010MNRAS.406..409F