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...
METIS - the Mid-infrared E-ELT Imager and Spectrograph (2008)
Brandl, Bernhard R., Lenzen, Rainer, Pantin, Eric, Glasse, Alistair, Blommaert, Joris, Venema, Lars, ...
METIS, the Mid-infrared ELT Imager and Spectrograph (formerly called MIDIR), is a proposed instrument for the European Extremely Large Telescope (E-ELT), currently undergoing a phase-A study. The...
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, ...
LUCIFER status report: summer 2008 (2008)
Mandel, Holger, Seifert, Walter, Hofmann, Reiner, Jütte, Marcus, Lenzen, Rainer, Ageorges, Nancy, ...
METIS: the mid-infrared E-ELT imager and spectrograph (2008)
Brandl, Bernhard R., Lenzen, Rainer, Pantin, Eric, Glasse, Alistair, Blommaert, Joris, Venema, Lars, ...
Nielsen, Eric L., Close, Laird M., Biller, Beth A., Masciadri, Elena, Lenzen, Rainer
We examine the implications for the distribution of extrasolar planets based on the null results from two of the largest direct imaging surveys published to date. Combining the measured contrast...
LUCIFER status report: summer 2008 (2008)
Mandel, Holger, Seifert, Walter, Hofmann, Reiner, Jütte, Marcus, Lenzen, Rainer, Ageorges, Nancy, ...
LUCIFER is a NIR spectrograph and imager (wavelength range 0.9 to 2.5 micron) for the Large Binocular Telescope (LBT) on Mt. Graham, Arizona, working at cryogenic temperatures of less than 70K. Two...
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...
METIS: the mid-infrared E-ELT imager and spectrograph (2008)
Brandl, Bernhard R., Lenzen, Rainer, Pantin, Eric, Glasse, Alistair, Blommaert, Joris, Venema, Lars, ...
METIS, the Mid-infrared ELT Imager and Spectrograph (formerly called MIDIR), is a proposed instrument for the European Extremely Large Telescope (E-ELT), currently undergoing a phase-A study. The...
SPHERE: a planet finder instrument for the VLT (2008)
Beuzit, Jean-Luc, Feldt, Markus, Dohlen, Kjetil, Mouillet, David, Puget, Pascal, Wildi, Francois, ...
Direct detection and spectral characterization of extra-solar planets is one of the most exciting but also one of the most challenging areas in modern astronomy. The challenge consists in the very...
PANIC: the new panoramic NIR camera for Calar Alto (2008)
Baumeister, Harald, Alter, Matthias, Cárdenas Vázquez, M. Concepcián, Fernandez, Matilde, Fried, Josef, Helmling, Jens, ...
PANIC is a wide-field NIR camera, which is currently under development for the Calar Alto observatory (CAHA) in Spain. It uses a mosaic of four Hawaii-2RG detectors and covers the spectral range from...
Nielsen, Eric L., Close, Laird M., Biller, Beth A., Masciadri, Elena, Lenzen, Rainer
We examine the implications for the distribution of extrasolar planets based on the null results from two of the largest direct imaging surveys published to date. Combining the measured contrast...
Biller, Beth A., Close, Laird M., Masciadri, Elena, Nielsen, Eric, Lenzen, Rainer, Brandner, Wolfgang, ...
We present the results of a survey of 45 young (
NACO-SDI direct imaging search for the exoplanet Eps Eri b (2007)
Janson, Markus, Brandner, Wolfgang, Henning, Thomas, Lenzen, Rainer, McArthur, Barbara, Benedict, G. Fritz, ...
The active K2V star $\epsilon$ Eri hosts the most nearby known extrasolar planet. With an angular separation of about 1" on average, and an age of a few to several hundred Myrs, $\epsilon$ Eri b is...
NACO-SDI direct imaging search for the exoplanet e Eri b (2007)
Janson, Markus, Brandner, Wolfgang, Henning, Thomas, Lenzen, Rainer, McArthur, Barbara, Benedict, G. Fritz, ...
The active K2 V star É Eri hosts the nearest known extrasolar planet. With an angular separation of about 1" on average, and an age of a few to several hundred megayears, É Eri b is one of the...
Biller, Beth A., Close, Laird M., Masciadri, Elena, Nielsen, Eric, Lenzen, Rainer, Brandner, Wolfgang, ...
We present the results of a survey of 45 young (
Improved age constraints for the AB Dor quadruple system - The binary nature of AB Dor B (2006)
Janson, Markus, Brandner, Wolfgang, Lenzen, Rainer, Close, Laird, Nielsen, Eric, Hartung, Markus, ...
We present resolved NACO photometry of the close binary AB Dor B in H- and Ks-band. AB Dor B is itself known to be a wide binary companion to AB Dor A, which in turn has a very low-mass close...
Biller, Beth A., Close, Laird M., Lenzen, Rainer, Brandner, Wolfgang, McCarthy, Donald, Nielsen, Eric, ...
We discuss the instrumental and data reduction techniques used to suppress speckle noise with the Simultaneous Differential Imager (SDI) implemented at the VLT and the MMT. SDI uses a double...
Biller, Beth A., Close, Laird M., Masciadri, Elena, Lenzen, Rainer, Brandner, Wolfgang, McCarthy, Donald, ...
We discuss the preliminary results of a survey of young ( 10 mag, Delta H > 11.5 mag for a T6 spectral type) at a separation of 0.5" from the primary star. With this degree of attenuation, we should...
Observational capabilities and technical solutions of a thermal and MIR instrument at E-ELT (2006)
Lenzen, Rainer, Brandl, Bernhard, Brandner, Wolfgang, Finger, Gert, Glasse, Alistair, Käufl, Hans-Ulrich, ...
A MIR instrumentation study for a European ELT has been performed by a Dutch consortium led by the Leiden Observatory (The Netherlands) and the Max-Planck-Institut fur Astronomie in Heidelberg...
ELT instrument concepts: impact on telescope and adaptive optics design (2006)
Cunningham, Colin, Atad-Ettadgui, Eli, Bacon, Roland, Brandl, Bernhard, Cuby, Jean-Gabriel, Dalton, Gavin, ...
We report on the development of instrument concepts for a European ELT, expanding on studies carried out as part of the ESO OWL concept. A range of instruments were chosen to demonstrate how an ELT...
MIDIR/T-OWL: the thermal/mid-IR instrument for the E-ELT (2006)
Brandl, Bernhard, Lenzen, Rainer, Venema, Lars, Käufl, Hans-Ulrich, Finger, Gert, Glasse, Alistair, ...
MIDIR is a combined thermal/mid-infrared imager and spectrograph for the European Extremely Large Telescope (EELT). It will operate in the infrared L, M, N, and Q-band to 20mum with a goal to extend...
Biller, Beth A., Close, Laird M., Masciadri, Elena, Lenzen, Rainer, Brandner, Wolfgang, McCarthy, Donald, ...
We discuss contrast limits obtained during a survey of young (10 mag, DeltaH>10.6 mag for a T6 spectral type) at a separation of 0.5" from the primary star. With this degree of attenuation, we can...
A Survey of close, young stars with SDI at the VLT and MMT (2006)
Biller, Beth A., Close, Laird M., Masciadri, Elena, Lenzen, Rainer, Brandner, Wolfgang, McCarthy, Donald, ...
Biller, Beth A., Close, Laird M., Lenzen, Rainer, Brandner, Wolfgang, McCarthy, Donald, Nielsen, Eric, ...
We discuss the instrumental and data reduction techniques used to suppress speckle noise with the Simultaneous Differential Imager (SDI) implemented at the VLT and the MMT. SDI uses a quad filter to...
The Arches Cluster - Evidence for a Truncated Mass Function? (2005)
Stolte, Andrea, Brandner, Wolfgang, Grebel, Eva K., Lenzen, Rainer, Lagrange, Anne-Marie
We have analyzed high-resolution, adaptive optics (AO) HK observations of the Arches cluster obtained with NAOS/CONICA. With a spatial resolution of 84 mas, the cluster center is uniquely resolved....
New observing modes of NACO (2005)
Kasper, Markus, Ageorges, Nancy, Boccaletti, Anthony, Brandner, Wolfgang, Close, Laird M., Davies, Ric, ...
Close, Laird M., Lenzen, Rainer, Guirado, Jose C., Nielsen, Eric L., Mamajek, Eric E., Brandner, Wolfgang, ...
Mass is the most fundamental parameter of a star, yet it is also one of the most difficult to measure directly. In general, astronomers estimate stellar masses by determining the luminosity and using...
The Arches cluster: Evidence for a truncated mass function? (2005)
Stolte, Andrea, Brandner, Wolfgang, Grebel, Eva K., Lenzen, Rainer, Lagrange, Anne-Marie
We have analyzed high-resolution, adaptive optics HK observations of the Arches cluster obtained with NAOS-CONICA. With a spatial resolution of 84 mas, the cluster center is uniquely resolved. From...
LUCIFER status report, summer 2004 (2004)
Mandel, Holger, Appenzeller, Immo, Seifert, Walter, Baumeister, Harald, Bizenberger, Peter, Dettmar, Ralf-Juergen, ...
Simulations versus observations obtained with simultaneous differential imaging (2004)
Berton, Alessandro, Kellner, Stefan, Feldt, Markus, Masciadri, Elena, Lenzen, Rainer, Brandner, Wolfgang, ...
Biller, Beth A., Close, Laird, Lenzen, Rainer, Brandner, Wolfgang, McCarthy, Donald W., Nielsen, Eric, ...
The MPIA detector system for the LBT instruments LUCIFER and LINC-NIRVANA (2004)
Ligori, Sebastiano, Lenzen, Rainer, Mandel, Holger, Grimm, Bernhard, Mall, Ulrich
A novel simultaneous differential imager for the direct imaging of giant planets (2004)
Lenzen, Rainer, Close, Laird, Brandner, Wolfgang, Biller, Beth, Hartung, Markus
Gisler, Daniel, Schmid, Hans Martin, Thalmann, Christian, Povel, Hans Peter, Stenflo, Jan O., Joos, Franco, ...
CONICA design, performance and final laboratory tests (2003)
Hartung, Markus, Lenzen, Rainer, Hofmann, Reiner, Böhm, Armin, Brandner, Wolfgang, Finger, Gert, ...
First diffraction limited images at VLT with NAOS and CONOCA (2003)
Lagrange, Anne M., Chauvin, Gael, Fusco, Thierry, Gendron, Eric, Rouan, Daniel, Hartung, Markus, ...
Discovery of a candidate for the central star of the ultracompact H II region G5.89-0.39 (2003)
Feldt, Markus, Puga, Elena, Lenzen, Rainer, Henning, Thomas, Brandner, Wolfgang, Stecklum, B., ...
We present high-resolution, near-infrared images of the ultracompact H II region G5.89-0.39 that were taken during a commissioning run of the NACO adaptive optics/near-infrared camera system at the...
LUCIFER: A multi-mode NIR instrument for the LBT (2003)
Seifert, Walter, Appenzeller, Immo, Baumeister, Harald, Bizenberger, Peter, Bomans, Dominik, Dettmar, Ralf-Juergen, ...
NAOS-CONICA first on sky results in a variety of observing modes (2003)
Lenzen, Rainer, Hartung, Markus, Brandner, Wolfgang, Finger, Gert, Hubin, Norbert N., Lacombe, Francois, ...
CONICA design, performance and final laboratory tests (2003)
Hartung, Markus, Lenzen, Rainer, Hofmann, Reiner, Böhm, Armin, Brandner, Wolfgang, Finger, Gert, ...
Calibration of CONICA static aberrations by phase diversity (2003)
Hartung, Markus, Blanc, Amandine, Fusco, Thierry, Lacombe, Francois, Mugnier, Laurent M., Rousset, Gerard, ...
Polarization with adaptive optics at ESO Very Large Telescope (Yepun) (2003)
Ageorges, Nancy, Lenzen, Rainer, Hartung, Markus, Brandner, Wolfgang, Gendron, Eric, Moorwood, Alan F. M., ...
Search for the First Quasars and Supernovae (2002)
Zheng, Wei, Ford, Holland, Tsvetanov, Zlatan, Davidsen, Arthur, Szalay, Alexander, Kruk, Jeffrey, ...
Thesis (doctoral)--Eberhard-Karls-Universität zu Tübingen, 1978.