Scientific Commons: Stefan Hippler

The AstraLux large M dwarf survey (2008)

Hormuth, Felix, Brandner, Wolfgang, Janson, Markus, Hippler, Stefan, Henning, Thomas

AstraLux is the Lucky Imaging camera for the Calar Alto 2.2-m telescope and the 3.5-m NTT at La Silla. It allows nearly diffraction limited imaging in the SDSS i' and z' bands of objects as faint as...

Near-infrared wavefront sensing for the VLT interferometer (2008)

Hippler, Stefan, Brandner, Wolfgang, Clénet, Yann, Hormuth, Felix, Gendron, Eric, Henning, Thomas, ...

The very large telescope (VLT) interferometer (VLTI) in its current operating state is equipped with high-order adaptive optics (MACAO) working in the visible spectrum. A low-order near-infrared...

AstraLux: the Calar Alto Lucky Imaging Camera (2008)

Hormuth, Felix, Hippler, Stefan, Brandner, Wolfgang, Wagner, Karl, Henning, Thomas

AstraLux is the Lucky Imaging camera for the Calar Alto 2.2-m telescope, based on an electron-multiplying high speed CCD. By selecting only the best 1-10% of several thousand short exposure frames,...

AstraLux - the Calar Alto 2.2-m telescope Lucky Imaging camera (2008)

Hormuth, Felix, Brandner, Wolfgang, Hippler, Stefan, Henning, Thomas

AstraLux is a Lucky Imaging camera for the Calar Alto 2.2-m telescope, based on an electron-multiplying high speed CCD. By selecting only the best 1-10% of several thousand short exposure frames,...

A comprehensive examination of the Eps Eri system -- Verification of a 4 micron narrow-band high-contrast imaging approach for planet searches (2008)

Janson, Markus, Reffert, Sabine, Brandner, Wolfgang, Henning, Thomas, Lenzen, Rainer, Hippler, Stefan

Due to its proximity, youth, and solar-like characteristics with a spectral type of K2V, Eps Eri is one of the most extensively studied systems in an extrasolar planet context. Based on radial...

Near-infrared wavefront sensing for the VLT interferometer (2008)

Hippler, Stefan, Brandner, Wolfgang, Clénet, Yann, Hormuth, Felix, Gendron, Eric, Henning, Thomas, ...

Atmospheric refractivity effects on mid-infrared ELT adaptive optics (2008)

Kendrew, Sarah, Jolissaint, Laurent, Mathar, Richard J., Stuik, Remko, Hippler, Stefan, Brandl, Bernhard

We discuss the effect of atmospheric dispersion on the performance of a mid-infrared adaptive optics assisted instrument on an extremely large telescope (ELT). Dispersion and atmospheric chromaticity...

AstraLux: the Calar Alto lucky imaging camera (2008)

Hormuth, Felix, Hippler, Stefan, Brandner, Wolfgang, Wagner, Karl, Henning, Thomas

AstraLux is the Lucky Imaging camera for the Calar Alto 2.2-m telescope, based on an electron-multiplying high speed CCD. By selecting only the best 1-10% of several thousand short exposure frames,...

Near-infrared wavefront sensing for the VLT interferometer (2008)

Hippler, Stefan, Brandner, Wolfgang, Clénet, Yann, Hormuth, Felix, Gendron, Eric, Henning, Thomas, ...

The very large telescope (VLT) interferometer (VLTI) in its current operating state is equipped with high-order adaptive optics (MACAO) working in the visible spectrum. A low-order near-infrared...

Direct imaging of the young spectroscopic binary HD 160934 (2006)

Hormuth, Felix, Brandner, Wolfgang, Hippler, Stefan, Janson, Markus, Henning, Thomas

We report on the direct detection of a close companion to HD 160934, a young active star, SB1 spectroscopic binary, and suggested member of the AB Doradus moving group. High angular resolution at the...

Atmosphere-like turbulence generation with surface-etched phase-screens (2006)

Hippler, Stefan, Hormuth, Felix, Butler, David J., Brandner, Wolfgang, Henning, Thomas

We built and characterized an optical system that emulates the optical characteristics of an 8m-class telescope like the Very Large Telescope. The system contains rotating glass phase-screens to...

Atmosphere-like turbulence generation with surface-etched phase-screens (2006)

Hippler, Stefan, Hormuth, Felix, Butler, David J., Brandner, Wolfgang, Henning, Thomas

We built and characterized an optical system that emulates the optical characteristics of an 8m-class telescope like the Very Large Telescope. The system contains rotating glass phase-screens to...

The MPIA multipurpose laboratory atmospheric turbulence simulator MAPS (2006)

Hippler, Stefan, Hormuth, Felix, Brandner, Wolfgang, Butler, David J., Henning, Thomas, Egner, Sebastian

We built an optical system that emulates the optical characteristics of an 8m-class telescope like the VLT and that contains rotating glass plates phase screens to generate realistic atmosphere-like...

A simulation code for AO assisted 3D spectroscopic imaging of extrasolar planets (2006)

Berton, Alessandro, Feldt, Markus, Gratton, Raffaele G., Henning, Thomas, Desidera, Silvano, Hippler, Stefan, ...

The search for extrasolar giant planets using integral field spectroscopy: Simulations (2006)

Berton, Alessandro, Feldt, Markus, Gratton, Raffaele, Hippler, Stefan, Henning, Thomas

We present here simulations of extrasolar planets detections obtained using a combination of extreme adaptive optics and integral field spectroscopy. The simulation code, written for IDL, provides...

Künstliche Sterne und grosse Gesichtsfelder: Adaptive Optik in der Astronomie, Teil 2 (2005)

Davies, Richard, Hippler, Stefan, Ragazzoni, Roberto

Wide-field post-processing of adaptive optics images (2005)

Weiß, A., Hippler, Stefan, Feldt, M.

Adaptive Optik: Der scharfe Blick ins All und ins Auge (2005)

Hippler, Stefan

Heutige Grossteleskope erzielen erst durch den Einsatz adaptiv optischer Systeme ihre volle Leistungsfaehigkeit. Fuer die zukuenftige Generation der Future Giant Telescopes mit Spiegeldurchmessern...

Kuenstliche Sterne und grosse Gesichtsfelder. Adaptive Optik in der Astronomie Teil II (2005)

Davies, Richard, Hippler, Stefan, Ragazzoni, Roberto

Im ersten Teil dieses Artikels wurden die Grundlagen der Adaptiven Optik zur Ausschaltung atmosphärischer Bildstörungen dargestellt. Es zeigte sich, dass zwei Faktoren ihren Nutzen stark...

Broadband, static wave-front generation: Na-Ag Ion-exchange phase screens and telescope emulation (2004)

Butler, David J., Hippler, Stefan, Egner, Sebastian, Xu, Wenli, Bähr, Jochen

We test the statistical properties of static, atmospherelike wave fronts in glass that allow repeatable testing of astronomical adaptive optics instrumentation. The technology is mask-structured ion...

Off-the-shelf real-time computers for next-generation adaptive optics (2004)

Hippler, Stefan, Looze, Douglas P., Gaessler, Wolfgang

CHEOPS/ZIMPOL: A VLT instrument study for the polarimetric search of scattered light from extrasolar planets (2004)

Gisler, Daniel, Schmid, Hans Martin, Thalmann, Christian, Povel, Hans Peter, Stenflo, Jan O., Joos, Franco, ...

Characterization of deformable mirrors for high-order adaptive optics systems (2004)

Stuik, Remko, Hippler, Stefan, Feldt, Markus, Aceituno, Jesus, Egner, Sebastian E.

Modal selection using genetic optimization (2004)

Looze, Douglas P., Hippler, Stefan, Feldt, Markus

Performance of PYRAMIR detector system (2004)

Ligori, Sebastiano, Grimm, Bernhard, Hippler, Stefan

Status report of PYRAMIR: A near-infrared pyramid wavefront sensor for ALFA (2004)

Costa, Joana B., Feldt, Markus, Wagner, Karl, Bizenberger, Peter, Hippler, Stefan, Baumeister, Harald, ...