Mr. Johan H. Pragt Profile

Johan H. Pragt

Coordinator Smart Frontend Group at ASTRON

SPIE Involvement:

Author

Publications (56)

Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

4MOST calibration system: design, assembly, and testing

Ioannis Politopoulos, Johan Pragt, Rik ter Horst, Ronald Roelfsema, Olga Bellido-Tirado, Joar Brynnel, Steffen Frey, Amina Helmi, Jeroen Herrewijnen, Roelof de Jong, Michael Lehmitz, Ramon Navarro, Allar Saviauk, Ray Sharples, Luke Tyas, Jurgen Schmoll, Walter Seifert, Menno de Haan, Menno Schuil, Eddy Elswijk, Eduardo Balbinot

Proceedings Volume 12184, 1218473 (2022) https://doi.org/10.1117/12.2629542

KEYWORDS: Calibration, Spectrographs, Integrating spheres, Telescopes, Fabry–Perot interferometers, Lamps, Camera shutters, Sensors, Mirrors, Lawrencium

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

4MOST: the 4-metre multi-object spectroscopic telescope project in the assembly, integration, and test phase

Roelof de Jong, Olga Bellido-Tirado, Joar Brynnel, Aida Ezzati Amini, Steffen Frey, Christine Füßlein, Miklos Gäbler, Domenico Giannone, Diana Johl, Silke Kuba, Ulrike Lemke, Genoveva Micheva, Allar Saviauk, Matthias Steinmetz, Jakob Walcher, Roland Winkler, Karin Lind, Jonathan Loveday, Sofia Feltzing, Richard McMahon, Vincenzo Mainieri, Jean-François Pirard, Thomas Bensby, Maria Bergemann, Cristina Chiappini, Norbert Christlieb, Maria-Rosa Cioni, Johan Comparat, Simon Driver, Isobel Hook, Mike Irwin, Jean-Paul Kneib, Jochen Liske, Andrea Merloni, Ivan Minchev, Johan Richard, Else Starkenburg, Mark Sullivan, Clare Worley, Wolfgang Gaessler, Florance Laurent, Johan Pragt, Alban Remillieux, Florian Rothmaier, Scott Smedley, Ingo Stilz, Nicholas Walton, David Alexander, Ross Church, Scott Croom, Luke Davies, Caroline Heneka, Nikolay Kacharov, Jörg Knoche, Georges Kordopatis, Mirko Krumpe, Sarah Martell, Peder Norberg, Ingrid Pelisoli, Sanjib Sharma, Jesper Storm, Elmo Tempel

Proceedings Volume 12184, 1218414 (2022) https://doi.org/10.1117/12.2628965

KEYWORDS: Calibration, Telescopes, Spectrographs, Stars, Control systems, Metrology, Cameras, Spectroscopy, Galactic astronomy, Galaxy evolution, Active galactic nuclei

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Proceedings Article | 17 December 2020 Presentation + Paper

Presentation + Paper

Integration and early testing of WEAVE: the next-generation spectroscopy facility for the William Herschel Telescope

Gavin Dalton, Scott Trager, Don Carlos Abrams, Piercarlo Bonifacio, J. Alfonso L. Aguerri, Antonella Vallenari, Georgia Bishop, Kevin Middleton, Chris Benn, Kevin Dee, Shan Mignot, Ian Lewis, Johannes Pragt, Sergio Pico, Nicholas Walton, Juerg Rey, Carlos Allende Prieto, Emilie Lhomé, Marc Balcells, David Terrett, Matthew Brock, Andy Ridings, Jure Skvarč, Marc Verheijen, Iain Steele, Remko Stuik, Gabby Kroes, Neils Tromp, Jan Kragt, Dirk Lesman, Chris Mottram, Stuart Bates, Frank Gribbin, Jose Alonso Burgal, José Miguel Herreros, José Miguel Delgado, Carlos Martin, Diego Cano, Ramon Navarro, Mike Irwin, Luis Peralta de Arriba, Neil O'Mahoney, Andrea Bianco, Alireza Moleinezhad, Rik ter Horst, Emilio Molinari, Marcello Lodi, José Guerra, Andrea Baruffalo, Esperanza Carrasco, Szigfrid Farcas, Ellen Schallig, Sarah Hughes, Vanessa Hill, Dan Smith, Janet Drew, Bianca Poggianti, Angela Iovino, Mat Pieri, Shoko Jin, Lillian Dominguez Palmero, Cecilia Fariña, Adrian Martín, Clare Worley, David Murphy, Steve Guest, Huw Morris, Eddy Elswijk, Menno de Haan, Hiddo Hanenburg, Bernardo Salasnich, Divakara Mayya, Rafael Izazaga-Pérez, Emanuel Gafton, Elisabetta Caffau, David Horville, Francisco Paz Chinchón, Jesus Falcon-Barosso, Boris Gänsicke, Jose San Juan, Nauzet Hernandez

Proceedings Volume 11447, 1144714 (2020) https://doi.org/10.1117/12.2561067

KEYWORDS: Telescopes, Spectroscopy, Observatories, Device simulation, Data processing, Molybdenum, Spectrographs, Image resolution, Spectral resolution

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Proceedings Article | 13 December 2020 Presentation

Presentation

4MOST: the 4-metre Multi-Object Spectroscopic Telescope project status: instrument manufacturing and integration, operations development, and survey planning

Roelof de Jong, Samual Barden, Olga Bellido-Tirado, Joar Brynnel, Isabella Cesarini, Steffen Frey, Domenico Giannone, Diana Johl, Andreas Kelz, Genoveva Micheva, Hakan Önel, Matthias Steinmetz, Jakob Walcher, Roland Winkler, Sofia Feltzing, Vincenzo Mainieri, Richard McMahon, Amina Helmi, Mike Irwin, Norbert Christlieb, Cristina Chiappini, Ivan Minchev, Else Starkenburg, Thomas Bensby, Maria Bergemann, Johan Comparat, Andrea Merloni, Simon Driver, Jochen Liske, Jean-Paul Kneib, Johan Richard, Maria-Rosa Cioni, Mark Sullivan, Scott Smedley, Alban Remilleux, Florian Rothmaier, Jean-François Pirard, Ingo Stilz, Johan Pragt, Wolfgang Gaessler, Clare Worley, Man Lam, Jörg Knoche, Nicholas Walton

Proceedings Volume 11447, 1144719 (2020) https://doi.org/10.1117/12.2561036

KEYWORDS: Spectroscopes, Telescopes, Astronomical imaging, Manufacturing, Astronomical telescopes, Infrared telescopes, Spectrographs, Visible radiation, Infrared astronomy, Infrared spectroscopy

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Proceedings Article | 23 July 2018 Presentation + Paper

Presentation + Paper

Construction progress of WEAVE: the next generation wide-field spectroscopy facility for the William Herschel Telescope

Gavin Dalton, Scott Trager, Don Carlos Abrams, Piercarlo Bonifacio, J. Alfonso Aguerri, Antonella Vallenari, Kevin Middleton, Chris Benn, Kevin Dee, Frédéric Sayède, Ian Lewis, Johannes Pragt, Sergio Picó, Nicholas Walton, Jeurg Rey, Carlos Allende, Émilie Lhomé, David Terrett, Matthew Brock, James Gilbert, Andy Ridings, Marc Verheijen, Ian Tosh, Iain Steele, Remko Stuik, Gabby Kroes, Neils Tromp, Jan Kragt, Dirk Lesman, Chris Mottram, Stuart Bates, Frank Gribbin, José Alonso Burgal, Jose Miguel Herreros, Jose Miguel Delgado, Carlos Martin, Diego Cano, Ramón Navarro, Mike Irwin, James Lewis, Eduardo Gonzales Solares, Neil O'Mahony, Andrea Bianco, Christina Zurita, Rik ter Horst, Emilio Molinari, Marcello Lodi, José Guerra, Andrea Baruffolo, Esperanza Carrasco, Szigfrid Farkas, Ellen Schallig, Vanessa Hill, Dan Smith, Janet Drew, Bianca Poggianti, Mat Pieri, Shoko Jin, Lilian Dominquez Palmero, Cecilia Fariña, Adrian Martin, Clare Worley, David Murphy, Andrea Hidalgo, Shan Mignot, Georgia Bishop, Steve Guest, Eddy Elswijk, Menno de Haan, Hiddo Hanenburg, Bernardo Salasnich, Divakara Mayya, Rafael Izazaga-Pérez, Luis Peralta de Arriba

Proceedings Volume 10702, 107021B (2018) https://doi.org/10.1117/12.2312031

KEYWORDS: Telescopes, Spectroscopy, Cameras, Chemical elements, Robots, Spectrographs, Polishing, Coating, Optical fibers

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Proceedings Article | 11 July 2018 Paper

Paper

MOSAIC: the ELT multi-object spectrograph

P. Jagourel, E. Fitzsimons, F. Hammer, F. De Frondat, M. Puech, C. Evans, R. Sanchez, I. Guinouard, F. Chemla, M. Frotin, Y. Yang, P. Parr-Burman, T. Morris, M. Dubbeldam, M. Close, K. Middleton, G. Rousset, É. Gendron, A. Kelz, A. Janssen, J. Pragt, R. Navarro, M. Larrieu, K. El Hadi, K. Dohlen, G. Dalton, I. Lewis, M. Rodrigues, S. Morris, L. Kaper, B. Barbuy, J-G. Cuby, Olivier Le Fèvre

Proceedings Volume 10702, 10702A4 (2018) https://doi.org/10.1117/12.2314135

KEYWORDS: Spectrographs, Near infrared, Adaptive optics, Visible radiation, Microlens, Astronomical imaging, Sensors, Mirrors, Relays, Spatial resolution

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Proceedings Article | 10 July 2018 Paper

Paper

VPHGs for WEAVE: design, manufacturing and characterization

Andrea Bianco, Giorgio Pariani, Matteo Aliverti, Alessio Zanutta, James Arns, Johan Pragt, Remko Stuik, Kevin Middleton, Ian Tosh, Gavin Dalton, Scott Trager, Don Carlos Abrams, Jose Alfonso Lopez Aguerri, Piercarlo Bonifacio, Antonella Vallenari, Esperanza Carrasco

Proceedings Volume 10706, 107064X (2018) https://doi.org/10.1117/12.2311693

KEYWORDS: Diffraction, Lawrencium, Diffraction gratings, Spectrographs, Holography, Antireflective coatings, Modulation, Chemical elements, Manufacturing, Optics manufacturing

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Proceedings Article | 10 July 2018 Paper

Paper

Calibration system for the 4MOST multi object fiber-fed spectrographs

Ronald Roelfsema, Johan Pragt, Rik ter Horst, Tibor Agocs, Olga Bellido, Joar Brynnel, Ariadna Calcines-Rosario, Steffen Frey, Amina Helmi, Jeroen Herrewijnen, Tom Houtsma, Roelof de Jong, Michael Lehmitz, Graham Murray, Gert Musters, Ramon Navarro, Allar Saviauk, Olivier Schnurr, Ray Sharples, Roland Winkler

Proceedings Volume 10702, 107027V (2018) https://doi.org/10.1117/12.2312473

KEYWORDS: Calibration, Fabry–Perot interferometers, Telescopes, Integrating spheres, Lamps, Spectrographs, Light sources, Beam splitters, Astronomical imaging, Spectrometers

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Proceedings Article | 10 July 2018 Paper

Paper

Trade-offs in the visible spectrograph of the ELT instrument MOSAIC

A. W. Janssen, E. Sokolova, J. Pragt, J. Kragt, Ramon Navarro, Niels Tromp, E. Fitzsimons, M. Rodrigues, M. Larrieu, A. Kelz, T. Morris, P. Jagourel, F. Chemla, L. Kaper, G. Dalton

Proceedings Volume 10702, 107029F (2018) https://doi.org/10.1117/12.2313302

KEYWORDS: Spectrographs, Optical fibers, Cameras, Visible radiation, Sensors, Lenses, Adaptive optics, Spectral resolution, Collimators, Prisms

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Proceedings Article | 10 July 2018 Paper

Paper

Product assurance for instrumental projects in research laboratory: galaxies, etoiles, physique, instrumentation (GEPI)

Fatima De Frondat Laadim, Pascal Jagourel, Mickael Frotin, François Hammer, Myriam Rodrigues, Mathieu Puech, Isabelle Guinouard, Fanny Chemla, Yanbin Yang, Ewan Fitzsimons, Phil Parr-Burman, Tim Morris, Marc Dubbeldam, Madeline Close, Kevin Middleton, Gerard Rousset, Andreas Kelz, Annemieke Janssen, Johan Pragt, Ramon Navarro, Marie Larrieu, Kacem El Hadi, Kjetil Dohlen, Gavin Dalton, Ian Lewis

Proceedings Volume 10705, 107051V (2018) https://doi.org/10.1117/12.2313247

KEYWORDS: Galactic astronomy, Analytical research, Aerospace engineering, Document management, Safety, Modeling, Reliability

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Proceedings Article | 9 July 2018 Presentation

Presentation

4MOST: the 4-metre multi-object spectroscopic telescope project at final design review (Conference Presentation)

Roelof de Jong, Samuel Barden, Olga Bellido-Tirado, Joar Brynnel, Steffen Frey, Domenico Giannone, Roger Haynes, Diana Johl, Olivier Schnurr, Jakob Walcher, Roland Winkler, Sofia Feltzing, Richard McMahon, Vincenzo Mainieri, Gabriella Baker, Patrick Caillier, Wolfgang Gaessler, Holger Mandel, Jean-François Pirard, Johan Pragt, Nicholas Walton, Thomas Bensby, Maria Bergemann, Cristina Chiappini, Norbert Christleib, Maria-Rosa Cioni, Simon Driver, Alexis Finoguenov, Amina Helmi, Mike Irwin, Jean-Paul Kneib, Jochen Liske, Andrea Merloni, Ivan Minchev, Bob Nichol, Johan Richard, Else Starkenburg, Manda Banerji, Thomas Boller, Georges Kordopatis, Mirko Krumpe, Karin Lind, Sarah Martell, Elmo Tempel, Scott Croom, Luke Davies, Morgan Fouesneau

Proceedings Volume 10702, 107021D (2018) https://doi.org/10.1117/12.2312012

KEYWORDS: Space telescopes, Telescopes, Spectroscopy, Optical instrument design, Device simulation, Astronomical imaging, Observatories, Computer simulations, Optical fibers

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We present an overview and status update of the 4MOST project at the Final Design Review. 4MOST is a major new wide-field, high-multiplex spectroscopic survey facility under development for the VISTA telescope at the Paranal Observatory of ESO. Starting in 2022, 4MOST will deploy 2436 optical fibres in a 4.1 square degree field-of-view using a fibre positioner based on the tilting spine principle. The fibres will feed one high-resolution (R~20,000) and two low-resolution (R~5000) spectrographs that all have fixed configuration, 3-channel designs with identical 6k x 6k CCD detectors. Updated performance estimates will be presented based on components already manufactured and pre-production prototypes of critical subsystems. The 4MOST science goals are mostly driven by a number of large area, space-based observatories of prime European interest: Gaia and PLATO (Galactic Archeology and Stellar Physics), eROSITA (High-Energy Sky), and Euclid (Cosmology and Galaxy Evolution). Science cases based on these observatories, along with wide-area ground-based facilities such as LSST, VISTA and VST drive the ten Consortium Surveys covering a large fraction of the Southern sky, with bright time mostly devoted to the Milky Way disk and bulge areas and the Magellanic Clouds, and the dark/gray time largely devoted to extra-galactic targets. In addition there will be a significant fraction of the fibre-hours devoted to Community Surveys, making 4MOST a true general-purpose survey facility, capable of delivering spectra of samples of objects that are spread over a large fraction of the sky. The 4MOST Facility Simulator was created to show the feasibility of the innovative operations scheme of 4MOST with all surveys operating in parallel. The simulator uses the mock catalogues created by the science teams, simulates the spectral throughput and detection of the objects, assigns the fibres at each telescope pointing, creates pointing distributions across the sky and simulates a 5-year survey (including overhead, calibration and weather losses), and finally does data quality analyses and computes the science Figure-of-Merits to assess the quality of science produced. The simulations prove the full feasibility of running different surveys in parallel.

Proceedings Article | 6 July 2018 Presentation + Paper

Presentation + Paper

The ELT-MOS (MOSAIC): towards the construction phase

Simon Morris, François Hammer, Pascal Jagourel, Christopher Evans, Mathieu Puech, Gavin Dalton, Myriam Rodrigues, Ruben Sanchez-Janssen, Ewan Fitzsimons, Beatriz Barbuy, Jean-Gabriel Cuby, Lex Kaper, Martin Roth, Gérard Rousset, Richard Myers, Olivier Le Fèvre, Alexis Finogenov, Jari Kotilainen, Bruno Castilho, Goran Ostlin, Sofia Feltzing, Andreas Korn, Jesus Gallego, África Castillo, Jorge Iglesias-Páramo, Laura Pentericci, Bodo Ziegler, Jose Afonso, Marc Dubbledam, Madeline Close, Phil Parr-Burman, Timothy Morris, Fanny Chemla, Fatima De Frondat, Andreas Kelz, Isabelle Guinouard, Ian Lewis, Kevin Middleton, Ramon Navarro, Marie Larrieu, Johan Pragt, Annemieke Janssen, Kjetil Dohlen, Kacem El Hadi, Éric Gendron, Yanbin Yang, Martyn Wells, Jean-Marc Conan, Thierry Fusco, Daniel Schaerer, Edwin Bergin, Sylvestre Taburet, Mickaël Frotin, Nadia Berkourn

Proceedings Volume 10702, 107021W (2018) https://doi.org/10.1117/12.2311430

KEYWORDS: Galactic astronomy, Spectrographs, Telescopes, Near infrared, Visible radiation, Astronomical imaging, Adaptive optics, Sensors, Astronomy, Physics

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Proceedings Article | 6 July 2018 Paper

Paper

Thermal and mechanical design and test of the CCD mount for the WEAVE spectrograph cryostats

Stuart Bates, Iain Steele, Chris Mottram, Helen Jermak, Niels Tromp, Jan Kragt, Eddy Elswijk, Johan Pragt, Remko Stuik, Robert Barnsley, Charles Monroe, Gavin Dalton, Scott Trager, Jose Alfonso Lopez Aguerri, Piercarlo Bonifacio, Antonella Vallenari, Esperanza Carrasco, Don Carlos Abrams, Kevin Middleton

Proceedings Volume 10709, 107091Z (2018) https://doi.org/10.1117/12.2312496

KEYWORDS: Charge-coupled devices, CCD image sensors, Nitrogen, Spectrographs, Confocal microscopy, Temperature metrology

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Proceedings Article | 21 November 2017 Open Access

Open Access

Paper

Directly polished lightweight aluminum mirror

Rik ter Horst, Niels Tromp, Menno de Haan, Ramon Navarro, Lars Venema, Johan Pragt

Proceedings Volume 10566, 105660P (2017) https://doi.org/10.1117/12.2308200

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Proceedings Article | 9 August 2016 Paper

Paper

4MOST: the 4-metre Multi-Object Spectroscopic Telescope project at preliminary design review

Roelof de Jong, Samuel Barden, Olga Bellido-Tirado, Joar Brynnel, Steffen Frey, Domenico Giannone, Roger Haynes, Diana Johl, Daniel Phillips, Olivier Schnurr, Jakob Walcher, Roland Winkler, Wolfgang Ansorge, Sofia Feltzing, Richard McMahon, Gabriella Baker, Patrick Caillier, Tom Dwelly, Wolfgang Gaessler, Olaf Iwert, Holger Mandel, Nikolai Piskunov, Johan Pragt, Nicholas Walton, Thomas Bensby, Maria Bergemann, Cristina Chiappini, Norbert Christlieb, Maria-Rosa Cioni, Simon Driver, Alexis Finoguenov, Amina Helmi, Michael Irwin, Francisco-Shu Kitaura, Jean-Paul Kneib, Jochen Liske, Andrea Merloni, Ivan Minchev, Johan Richard, Else Starkenburg

Proceedings Volume 9908, 99081O (2016) https://doi.org/10.1117/12.2232832

KEYWORDS: Telescopes, Spectroscopy, Spectrographs, Stars, Galactic astronomy, Calibration, Lawrencium, Spine, Cameras, Metrology

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Proceedings Article | 9 August 2016 Paper

Paper

SPHERE on-sky performance compared with budget predictions

Kjetil Dohlen, Arthur Vigan, David Mouillet, François Wildi, Jean-François Sauvage, Thierry Fusco, Jean-Luc Beuzit, Pascal Puget, David Le Mignant, Ronald Roelfsema, Johan Pragt, Hans Martin Schmid, Raffaele Gratton, Dino Mesa, Riccardo Claudi, Maud Langlois, Anne Costille, Emmanuel Hugot, Jared O'Neil, Juan Carlos Guerra, Mamadou N'Diaye, Julien Girard, Dimitri Mawet, Gerard Zins

Proceedings Volume 9908, 99083D (2016) https://doi.org/10.1117/12.2233953

KEYWORDS: Wavefronts, Optical spheres, Cameras, Actuators, Calibration, Coronagraphy, Mirrors, Infrared radiation, Sensors, Iterated function systems

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Proceedings Article | 4 August 2016 Paper

Paper

Final design and progress of WEAVE: the next generation wide-field spectroscopy facility for the William Herschel Telescope

Gavin Dalton, Scott Trager, Don Carlos Abrams, Piercarlo Bonifacio, J. Alfonso Aguerri, Kevin Middleton, Chris Benn, Kevin Dee, Frédéric Sayède, Ian Lewis, Johannes Pragt, Sergio Pico, Nic Walton, Jeurg Rey, Carlos Allende Prieto, José Peñate, Emilie Lhome, Tibor Agócs, José Alonso, David Terrett, Matthew Brock, James Gilbert, Ellen Schallig, Andy Ridings, Isabelle Guinouard, Marc Verheijen, Ian Tosh, Kevin Rogers, Martin Lee, Iain Steele, Remko Stuik, Niels Tromp, Attila Jaskó, Esperanza Carrasco, Szigfrid Farcas, Jan Kragt, Dirk Lesman, Gabby Kroes, Chris Mottram, Stuart Bates, Luis Fernando Rodriguez, Frank Gribbin, José Miguel Delgado, José Miguel Herreros, Carlos Martin, Diego Cano, Ramon Navarro, Mike Irwin, Jim Lewis, Eduardo Gonzalez Solares, David Murphy, Clare Worley, Richard Bassom, Neil O'Mahoney, Andrea Bianco, Christina Zurita, Rik ter Horst, Emilio Molinari, Marcello Lodi, José Guerra, Adrian Martin, Antonella Vallenari, Bernardo Salasnich, Andrea Baruffolo, Shoko Jin, Vanessa Hill, Dan Smith, Janet Drew, Bianca Poggianti, Mat Pieri, Lillian Dominquez Palmero, Cecilia Farina

Proceedings Volume 9908, 99081G (2016) https://doi.org/10.1117/12.2231078

KEYWORDS: Spectroscopy, Space telescopes, Telescopes, Optical instrument design, Optics manufacturing, Spectrographs, Manufacturing, Molybdenum, Stars, Structured optical fibers

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Proceedings Article | 26 July 2016 Paper

Paper

The ZIMPOL high contrast imaging polarimeter for SPHERE: polarimetric high contrast commissioning results

Ronald Roelfsema, Andreas Bazzon, Hans Martin Schmid, Johan Pragt, Alain Govaert, Daniel Gisler, Carsten Dominik, Andrea Baruffolo, Jean-Luc Beuzit, Anne Costille, Kjetil Dohlen, Mark Downing, Eddy Elswijk, Menno de Haan, Norbert Hubin, Markus Kasper, Christoph Keller, Jean-Louis Lizon, David Mouillet, Alexey Pavlov, Pascal Puget, Bernardo Salasnich, Jean-Francois Sauvage, Francois Wildi

Proceedings Volume 9909, 990927 (2016) https://doi.org/10.1117/12.2231883

KEYWORDS: Polarimetry, Optical spheres, Point spread functions, Speckle, Polarization, Coronagraphy, Planets, Speckle pattern, Switches, Denoising

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Proceedings Article | 22 July 2016 Paper

Paper

First results of tests on the WEAVE fibres

Frédéric Sayède, Youssef Younes, Gilles Fasola, Stéphane Dorent, Don Carlos Abrams, J. Alphonso L. Aguerri, Piercarlo Bonifacio, Esperanza Carrasco, Gavin Dalton, Kevin Dee, Philippe Laporte, Ian Lewis, Emilie Lhome, Kevin Middleton, Johan Pragt, Juerg Rey, Remko Stuik, Scott Trager, Antonella Vallenari

Proceedings Volume 9912, 991220 (2016) https://doi.org/10.1117/12.2231170

KEYWORDS: Spectrographs, Telescopes, Stars, Sensors, Molybdenum, Light emitting diodes, Device simulation, Near field, Mirrors, Light sources

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Proceedings Article | 24 July 2014 Paper

Paper

4MOST: 4-metre Multi-Object Spectroscopic Telescope

Roelof de Jong, Sam Barden, Olga Bellido-Tirado, Joar Brynnel, Cristina Chiappini, Éric Depagne, Roger Haynes, Diana Johl, Daniel Phillips, Olivier Schnurr, Axel Schwope, Jakob Walcher, Svend Bauer, Gabriele Cescutti, Maria-Rosa Cioni, Frank Dionies, Harry Enke, Dionne Haynes, Andreas Kelz, Francisco Kitaura, Georg Lamer, Ivan Minchev, Volker Müller, Sebastián Nuza, Jean-Christophe Olaya, Tilmann Piffl, Emil Popow, Allar Saviauk, Matthias Steinmetz, Uğur Ural, Monica Valentini, Roland Winkler, Lutz Wisotzki, Wolfgang Ansorge, Manda Banerji, Eduardo Gonzalez Solares, Mike Irwin, Robert Kennicutt, David King, Richard McMahon, Sergey Koposov, Ian Parry, Xiaowei Sun, Nicholas Walton, Gert Finger, Olaf Iwert, Mirko Krumpe, Jean-Louis Lizon, Vincenzo Mainieri, Jean-Philippe Amans, Piercarlo Bonifacio, Matthieu Cohen, Patrick François, Pascal Jagourel, Shan Mignot, Frédéric Royer, Paola Sartoretti, Ralf Bender, Hans-Joachim Hess, Florian Lang-Bardl, Bernard Muschielok, Jörg Schlichter, Hans Böhringer, Thomas Boller, Angela Bongiorno, Marcella Brusa, Tom Dwelly, Andrea Merloni, Kirpal Nandra, Mara Salvato, Johannes Pragt, Ramón Navarro, Gerrit Gerlofsma, Ronald Roelfsema, Gavin Dalton, Kevin Middleton, Ian Tosh, Corrado Boeche, Elisabetta Caffau, Norbert Christlieb, Eva Grebel, Camilla Hansen, Andreas Koch, Hans-G. Ludwig, Holger Mandel, Andreas Quirrenbach, Luca Sbordone, Walter Seifert, Guido Thimm, Amina Helmi, Scott trager, Thomas Bensby, Sofia Feltzing, Gregory Ruchti, Bengt Edvardsson, Andreas Korn, Karin Lind, Wilfried Boland, Matthew Colless, Gabriella Frost, James Gilbert, Peter Gillingham, Jon Lawrence, Neville Legg, Will Saunders, Andrew Sheinis, Simon Driver, Aaron Robotham, Roland Bacon, Patrick Caillier, Johan Kosmalski, Florence Laurent, Johan Richard

Proceedings Volume 9147, 91470M (2014) https://doi.org/10.1117/12.2055826

KEYWORDS: Galactic astronomy, Spectrographs, Telescopes, Stars, Spine, Spectroscopy, Spectroscopes, X-rays, Observatories, Calibration

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Proceedings Article | 24 July 2014 Paper

Paper

The 4MOST instrument concept overview

Roger Haynes, Samuel Barden, Roelof de Jong, Olivier Schnurr, Olga Bellido, Jakob Walcher, Dionne Haynes, Roland Winkler, Svend-Marian Bauer, Frank Dionies, Allar Saviauk, Cristina Chiappini, Axel Schwope, Joar Brynnel, Matthias Steinmetz, Richard McMahon, Sofia Feltzing, Patrick Francois, Scott Trager, Ian Parry, Mike Irwin, Nicholas Walton, David King, David Sun, Eduaro Gonzalez-Solares, Ian Tosh, Gavin Dalton, Kevin Middleton, Piercarlo Bonifacio, Pascal Jagourel, Shan Mignot, Mathieu Cohen, Jean-Philippe Amans, Frederic Royer, Paola Sartoretti, Johan Pragt, Gerrit Gerlofsma, Ronald Roelfsema, Ramon Navarro, Guido Thimm, Walter Seifert, Norbert Christlieb, Holger Mandel, Trifon Trifonov, Wenli Xu, Florian Lang-Bardl, Bernard Muschielok, Jörg Schlichter, Hans-Joachim Hess, Frank Grupp, Hans Boehringer, Thomas Boller, Tom Dwelly, Ralf Bender, Piero Rosati, Olaf Iwert, Gert Finger, Jean-Louis Lizon L'Allemand, Will Saunders, Andrew Sheinis, Gabriella Frost, Tony Farrell, Lewis Waller, Eric Depagne, Florence Laurent, Patrick Caillier, Johan Kosmalski, Johan Richard, Roland Bacon, Wolfgang Ansorge

Proceedings Volume 9147, 91476I (2014) https://doi.org/10.1117/12.2057253

KEYWORDS: Control systems, Telescopes, Sensors, Calibration, Spectrographs, Metrology, Neodymium, Ions, Optical instrument design, Optical design

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Proceedings Article | 24 July 2014 Paper

Paper

The design of the WEAVE spectrograph

Kevin Rogers, Remko Stuik, Iain Steele, Johan Pragt, Kevin Middleton, Stuart Bates, Jan Kragt, Niels Tromp, Dirk Lesman, Emilie Lhomé, Gavin Dalton, Scott Trager, Ramon Navarro, Don Abrams, Ian Tosh, Attila Jasko, Carlos Martin, Neil O'Mahony, Sergio Pico, Diego Cano Infantes, Andrea Bianco, Jose Delgado, Luis Rodríguez

Proceedings Volume 9147, 91476H (2014) https://doi.org/10.1117/12.2055860

KEYWORDS: Spectrographs, Sensors, Cameras, Collimators, Mirrors, Spectral resolution, Image resolution, Spatial resolution, Optical design, Telescopes

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Proceedings Article | 24 July 2014 Paper

Paper

The hardware control system for WEAVE at the William Herschel telescope

Jose Delgado Hernandez, Luis Rodríguez-Ramos, Diego Cano Infantes, Carlos Martin, Craige Bevil, Sergio Picó, Kevin Dee, Don Carlos Abrams, Ian Lewis, Johan Pragt, Remko Stuik, Niels Tromp, Gavin Dalton, J. Alfonso L. Aguerri, Piercarlo Bonifacio, Kevin Middleton, Scott Trager

Proceedings Volume 9147, 914767 (2014) https://doi.org/10.1117/12.2055934

KEYWORDS: Control systems, Spectrographs, Telescopes, Sensors, Picture Archiving and Communication System, Camera shutters, Computer programming, Actuators, Switches, Space telescopes

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Proceedings Article | 8 July 2014 Paper

Paper

The ZIMPOL high contrast imaging polarimeter for SPHERE: system test results

Ronald Roelfsema, Andreas Bazzon, Hans Martin Schmid, Johan Pragt, Daniel Gisler, Carsten Dominik, Andrea Baruffolo, Jean-Luc Beuzit, Anne Costille, Kjetil Dohlen, Mark Downing, Eddy Elswijk, Menno de Haan, Norbert Hubin, Markus Kasper, Christoph Keller, Jean-Louis Lizon, David Mouillet, Alexey Pavlov, Pascal Puget, Bernardo Salasnich, Jean-Francois Sauvage, Francois Wildi

Proceedings Volume 9147, 91473W (2014) https://doi.org/10.1117/12.2056493

KEYWORDS: Polarization, Polarimetry, Coronagraphy, Optical spheres, Point spread functions, Planets, Imaging systems, Adaptive optics, Sensors, Charge-coupled devices

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Proceedings Article | 8 July 2014 Paper

Paper

MOONS: the Multi-Object Optical and Near-infrared Spectrograph for the VLT

M. Cirasuolo, J. Afonso, M. Carollo, H. Flores, R. Maiolino, E. Oliva, S. Paltani, Leonardo Vanzi, Christopher Evans, M. Abreu, David Atkinson, C. Babusiaux, Steven Beard, F. Bauer, M. Bellazzini, Ralf Bender, P. Best, N. Bezawada, P. Bonifacio, A. Bragaglia, I. Bryson, D. Busher, A. Cabral, K. Caputi, M. Centrone, F. Chemla, A. Cimatti, M-R. Cioni, G. Clementini, J. Coelho, D. Crnojevic, E. Daddi, J. Dunlop, S. Eales, S. Feltzing, A. Ferguson, M. Fisher, A. Fontana, J. Fynbo, B. Garilli, G. Gilmore, A. Glauser, I. Guinouard, F. Hammer, P. Hastings, A. Hess, R. Ivison, P. Jagourel, M. Jarvis, L. Kaper, G. Kauffman, A. Kitching, A. Lawrence, D. Lee, B. Lemasle, G. Licausi, S. Lilly, D. Lorenzetti, D. Lunney, F. Mannucci, R. McLure, D. Minniti, D. Montgomery, B. Muschielok, K. Nandra, R. Navarro, P. Norberg, S. Oliver, L. Origlia, N. Padilla, J. Peacock, F. Pedichini, J. Peng, L. Pentericci, J. Pragt, M. Puech, S. Randich, P. Rees, A. Renzini, N. Ryde, M. Rodrigues, I. Roseboom, F. Royer, R. Saglia, A. Sanchez, R. Schiavon, H. Schnetler, D. Sobral, R. Speziali, D. Sun, R. Stuik, A. Taylor, W. Taylor, S. Todd, E. Tolstoy, M. Torres, M. Tosi, E. Vanzella, L. Venema, F. Vitali, M. Wegner, M. Wells, V. Wild, G. Wright, G. Zamorani, M. Zoccali

Proceedings Volume 9147, 91470N (2014) https://doi.org/10.1117/12.2056012

KEYWORDS: Galactic astronomy, Spectrographs, Stars, Spectral resolution, Spectroscopy, Astronomical imaging, Sensors, Cameras, Control systems, Astronomy

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Proceedings Article | 8 July 2014 Paper

Paper

Project overview and update on WEAVE: the next generation wide-field spectroscopy facility for the William Herschel Telescope

Gavin Dalton, Scott Trager, Don Carlos Abrams, Piercarlo Bonifacio, J. Alfonso López Aguerri, Kevin Middleton, Chris Benn, Kevin Dee, Frédéric Sayède, Ian Lewis, Johan Pragt, Sergio Pico, Nic Walton, Juerg Rey, Carlos Allende Prieto, José Peñate, Emilie Lhome, Tibor Agócs, José Alonso, David Terrett, Matthew Brock, James Gilbert, Andy Ridings, Isabelle Guinouard, Mark Verheijen, Ian Tosh, Kevin Rogers, Iain Steele, Remko Stuik, Neils Tromp, Attila Jasko, Jan Kragt, Dirk Lesman, Chris Mottram, Stuart Bates, Frank Gribbin, Luis Fernando Rodriguez, José Delgado, Carlos Martin, Diego Cano, Ramón Navarro, Mike Irwin, Jim Lewis, Eduardo Gonzalez Solares, Neil O'Mahony, Andrea Bianco, Christina Zurita, Rik ter Horst, Emilio Molinari, Marcello Lodi, José Guerra, Antonella Vallenari, Andrea Baruffolo

Proceedings Volume 9147, 91470L (2014) https://doi.org/10.1117/12.2055132

KEYWORDS: Telescopes, Spectrographs, Space telescopes, Cameras, Stars, Spectroscopy, Molybdenum, Imaging systems, Galactic astronomy, Optics manufacturing

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Proceedings Article | 26 September 2013 Paper

Paper

Sphere: complete laboratory performance and prediction for on-sky first light

Jean-François Sauvage, Jean-Luc Beuzit, Ronald Roelfsema, Markus Feldt, Kjetil Dohlen, David Mouillet, Pascal Puget, Francois Wildi, Lyu Abe, Andrea Baruffolo, Pierre Baudoz, Andreas Bazzon, Anthony Boccaletti, Tristan Buey, Marcel Carbillet, Julien Charton, Riccardo Claudi, Anne Costille, Alain Delboulbé, Silvano Desidera, Carsten Dominik, Mark Downing, Christophe Fabron, Philippe Feautrier, Enrico Fedrigo, Thierry Fusco, Enrico Giro, Laurence Gluck, Raffaele Gratton, Thomas Henning, Norbert Hubin, Markus Kasper, Anne-Marie Lagrange, Maud Langlois, David Le Mignant, Jean-Louis Lizon, Fabrice Madec, Yves Magnard, Patrice Martinez, Dino Mesa, Ole Möller-Nilsson, Thibaut Moulin, Claire Moutou, Alexey Pavlov, Denis Perret, Cyril Petit, Johan Pragt, Patrick Rabou, Sylvain Rochat, Bernardo Salasnich, Gérard Rousset, Hans-Martin Schmid, Arnaud Sevin, Christian Soenke, Eric Stadler, Marcos Suarez, Massimo Turatto, Stéphane Udry, Arthur Vigan, Farrokh Vakili, Gérard Zins, Alice Zurlo

Proceedings Volume 8864, 88640B (2013) https://doi.org/10.1117/12.2025562

KEYWORDS: Optical spheres, Coronagraphy, Turbulence, Exoplanets, Stars, Planets, Iterated function systems, Adaptive optics, Visible radiation, Polarimetry

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Proceedings Article | 26 September 2013 Paper

Paper

SPHERE-ZIMPOL system testing: status report on polarimetric high contrast results

Ronald Roelfsema, Daniel Gisler, Johan Pragt, Hans Martin Schmid, Andreas Bazzon, Carsten Dominik, Andrea Baruffolo, Anthonoy Boccaletti, Jean-Luc Beuzit, Anne Costille, Kjetil Dohlen, Mark Downing, Eddy Elswijk, Menno de Haan, Norbert Hubin, Markus Kasper, Christoph Keller, Matthew Kenworthy, Jean-Louis Lizon, Patrice Martinez, David Mouillet, Alexey Pavlov, Pascal Puget, Bernardo Salasnich, Jean-Francois Sauvage, Christian Thalmann, Francois Wildi

Proceedings Volume 8864, 88640C (2013) https://doi.org/10.1117/12.2023600

KEYWORDS: Polarimetry, Coronagraphy, Polarization, Optical spheres, Planets, Adaptive optics, Sensors, Exoplanets, Turbulence, Signal detection

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Proceedings Article | 5 October 2012 Paper

Paper

4MOST: 4-metre multi-object spectroscopic telescope

Roelof de Jong, Olga Bellido-Tirado, Cristina Chiappini, Éric Depagne, Roger Haynes, Diana Johl, Olivier Schnurr, Axel Schwope, Jakob Walcher, Frank Dionies, Dionne Haynes, Andreas Kelz, Francisco Kitaura, Georg Lamer, Ivan Minchev, Volker Müller, Sebastián Nuza, Jean-Christophe Olaya, Tilmann Piffl, Emil Popow, Matthias Steinmetz, Ugur Ural, Mary Williams, Roland Winkler, Lutz Wisotzki, Wolfgang Ansorge, Manda Banerji, Eduardo Gonzalez Solares, Mike Irwin, Robert Kennicutt, Dave King, Richard McMahon, Sergey Koposov, Ian Parry, David Sun, Nicholas Walton, Gert Finger, Olaf Iwert, Mirko Krumpe, Jean-Louis Lizon, Mainieri Vincenzo, Jean-Philippe Amans, Piercarlo Bonifacio, Mathieu Cohen, Patrick Francois, Pascal Jagourel, Shan Mignot, Frédéric Royer, Paola Sartoretti, Ralf Bender, Frank Grupp, Hans-Joachim Hess, Florian Lang-Bardl, Bernard Muschielok, Hans Böhringer, Thomas Boller, Angela Bongiorno, Marcella Brusa, Tom Dwelly, Andrea Merloni, Kirpal Nandra, Mara Salvato, Johannes Pragt, Ramón Navarro, Gerrit Gerlofsma, Ronald Roelfsema, Gavin Dalton, Kevin Middleton, Ian Tosh, Corrado Boeche, Elisabetta Caffau, Norbert Christlieb, Eva Grebel, Camilla Hansen, Andreas Koch, Hans-G. Ludwig, Andreas Quirrenbach, Luca Sbordone, Walter Seifert, Guido Thimm, Trifon Trifonov, Amina Helmi, Scott Trager, Sofia Feltzing, Andreas Korn, Wilfried Boland

Proceedings Volume 8446, 84460T (2012) https://doi.org/10.1117/12.926239

KEYWORDS: Spectrographs, Telescopes, Stars, Space telescopes, Calibration, Actuators, Optical instrument design, Spectral resolution, Spectroscopy, Galactic astronomy

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Proceedings Article | 25 September 2012 Paper

Paper

Modeling the instrumental polarization of the VLT and E-ELT telescopes with the M&m's code

M. de Juan Ovelar, S. Diamantopoulou, R. Roelfsema, T. van Werkhoven, F. Snik, Johan Pragt, C. Keller

Proceedings Volume 8449, 844912 (2012) https://doi.org/10.1117/12.926588

KEYWORDS: Polarization, Polarimetry, Telescopes, Mirrors, Modulation, Device simulation, Optical components, Instrument modeling, Systems modeling, Mueller matrices

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Proceedings Article | 24 September 2012 Paper

Paper

Alignment of the SPHERE-ZIMPOL imaging polarimeter

Johan Pragt, Ronald Roelfsema, Daniel Gisler, Francois Wildi, Hans M. Schmid, Florence Rigal, Eddy Elswijk, Menno de Haan, Andreas Bazzon, Kjetil Dohlen, A. Costille, Carsten Dominik

Proceedings Volume 8446, 844697 (2012) https://doi.org/10.1117/12.926766

KEYWORDS: Optical spheres, Mirrors, Sensors, Polarimetry, Beam splitters, Polarizers, Optical alignment, Telescopes, Coronagraphy, Polarization

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Proceedings Article | 24 September 2012 Paper

Paper

The design of the MOONS-VLT spectrometer

E. Oliva, E. Diolaiti, B. Garilli, R. Gratton, D. Lorenzetti, P. Schipani, S. Scuderi, E. Vanzella, M. Cirasuolo, J. Afonso, R. Bender, P. Bonifacio, L. Kaper, L. Vanzi, C. Baffa, A. Bianco, C. Bonoli, F. Bortoletto, P. Bruno, L. Carbonaro, M. Centrone, G. Cresci, V. De Caprio, C. Del Vecchio, P. Di Marcantonio, A. Di Paola, F. D'Alessio, M. D'Alessandro, S. D'Orsi, G. Falcini, D. Ferruzzi, A. Fontana, I. Foppiani, M. Fumana, E. Giani, F. Leone, G. Li Causi, M. Lombini, R. Maiolino, F. Mannucci, L. Marty, L. Miglietta, M. Munari, R. Navarro, L. Origlia, L. Paioro, F. Pedichini, J. Pragt, S. Randich, M. Scodeggio, P. Spanò, R. Speziali, R. Stuik, A. Tozzi, F. Vitali

Proceedings Volume 8446, 84464V (2012) https://doi.org/10.1117/12.925309

KEYWORDS: Optical fibers, Cameras, Spectroscopy, Sensors, Collimators, Spectrographs, Lawrencium, Mirrors, Spectral resolution, Lenses

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Proceedings Article | 24 September 2012 Paper

Paper

SPHERE / ZIMPOL: characterization of the FLC polarization modulator

Andreas Bazzon, Daniel Gisler, Ronald Roelfsema, Hans M. Schmid, Johan Pragt, Eddy Elswijk, Menno de Haan, Mark Downing, Bernardo Salasnich, Alexey Pavlov, Jean-Luc Beuzit, Kjetil Dohlen, David Mouillet, François Wildi

Proceedings Volume 8446, 844693 (2012) https://doi.org/10.1117/12.925973

KEYWORDS: Polarization, Polarimetry, Calibration, Modulators, Modulation, Sensors, Switches, Charge-coupled devices, Optical spheres, Linear polarizers

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Proceedings Article | 24 September 2012 Paper

Paper

MOONS: a multi-object optical and near-infrared spectrograph for the VLT

M. Cirasuolo, J. Afonso, R. Bender, P. Bonifacio, C. Evans, L. Kaper, Ernesto Oliva, Leonardo Vanzi, Manuel Abreu, Eli Atad-Ettedgui, Carine Babusiaux, Franz Bauer, Philip Best, Naidu Bezawada, Ian Bryson, Alexandre Cabral, Karina Caputi, Mauro Centrone, Fanny Chemla, Andrea Cimatti, Maria-Rosa Cioni, Gisella Clementini, João Coelho, Emanuele Daddi, James Dunlop, Sofia Feltzing, Annette Ferguson, Hector Flores, Adriano Fontana, Johan Fynbo, Bianca Garilli, Adrian Glauser, Isabelle Guinouard, Jean-François Hammer, Peter Hastings, Hans-Joachim Hess, Rob Ivison, Pascal Jagourel, Matt Jarvis, G. Kauffman, A. Lawrence, D. Lee, G. Li Causi, S. Lilly, D. Lorenzetti, R. Maiolino, F. Mannucci, R. McLure, D. Minniti, D. Montgomery, B. Muschielok, K. Nandra, R. Navarro, P. Norberg, L. Origlia, N. Padilla, J. Peacock, F. Pedicini, L. Pentericci, J. Pragt, M. Puech, S. Randich, A. Renzini, N. Ryde, M. Rodrigues, F. Royer, R. Saglia, A. Sánchez, H. Schnetler, D. Sobral, R. Speziali, S. Todd, E. Tolstoy, M. Torres, L. Venema, F. Vitali, M. Wegner, M. Wells, V. Wild, G. Wright

Proceedings Volume 8446, 84460S (2012) https://doi.org/10.1117/12.925871

KEYWORDS: Galactic astronomy, Spectrographs, Spectral resolution, Spectroscopy, Stars, Astronomical imaging, Astronomy, Near infrared spectroscopy, Spine, Optical fibers

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Proceedings Article | 24 September 2012 Paper

Paper

WEAVE: the next generation wide-field spectroscopy facility for the William Herschel Telescope

Gavin Dalton, Scott Trager, Don Carlos Abrams, David Carter, Piercarlo Bonifacio, J. Alfonso L. Aguerri, Mike MacIntosh, Chris Evans, Ian Lewis, Ramon Navarro, Tibor Agocs, Kevin Dee, Sophie Rousset, Ian Tosh, Kevin Middleton, Johannes Pragt, David Terrett, Matthew Brock, Chris Benn, Marc Verheijen, Diego Cano Infantes, Craige Bevil, Iain Steele, Chris Mottram, Stuart Bates, Francis J. Gribbin, Jürg Rey, Luis Fernando Rodriguez, Jose Miguel Delgado, Isabelle Guinouard, Nic Walton, Michael Irwin, Pascal Jagourel, Remko Stuik, Gerrit Gerlofsma, Ronald Roelfsma, Ian Skillen, Andy Ridings, Marc Balcells, Jean-Baptiste Daban, Carole Gouvret, Lars Venema, Paul Girard

Proceedings Volume 8446, 84460P (2012) https://doi.org/10.1117/12.925950

KEYWORDS: Telescopes, Cameras, Space telescopes, Molybdenum, Spectrographs, Galactic astronomy, Stars, Sensors, Spectroscopy, Spectral resolution

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Proceedings Article | 24 September 2012 Paper

Paper

Tests of the demodulating CCDs for the SPHERE / ZIMPOL imaging polarimeter

Hans-Martin Schmid, Mark Downing, Ronald Roelfsema, Andreas Bazzon, Daniel Gisler, Johan Pragt, Claudio Cumani, Bernardo Salasnich, Alexey Pavlov, Andrea Baruffolo, Jean-Luc Beuzit, Anne Costille, Sebastian Deiries, Kjetil Dohlen, Carsten Dominik, Eddy Elswijk, Markus Feldt, Markus Kasper, David Mouillet, Christian Thalmann, François Wildi

Proceedings Volume 8446, 84468Y (2012) https://doi.org/10.1117/12.925886

KEYWORDS: Polarimetry, Sensors, Charge-coupled devices, Modulation, Polarization, Optical spheres, Demodulation, Photons, Stars, Planets

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Proceedings Article | 13 September 2012 Paper

Paper

A new generation active arrays for optical flexibility in astronomical instrumentation

G. Kroes, A. Jaskó, J. Pragt, L. Venema, M. De Haan

Proceedings Volume 8450, 845029 (2012) https://doi.org/10.1117/12.926481

KEYWORDS: Mirrors, Active optics, Finite element methods, Optics manufacturing, Prototyping, Surface finishing, Adaptive optics, Actuators, Telescopes, Photovoltaics

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Proceedings Article | 15 September 2011 Paper

Paper

The ZIMPOL high contrast imaging polarimeter for SPHERE: sub-system test results

Ronald Roelfsema, Daniel Gisler, Johan Pragt, Hans Martin Schmid, Andreas Bazzon, Carsten Dominik, Andrea Baruffolo, Jean-Luc Beuzit, Julien Charton, Kjetil Dohlen, Mark Downing, Eddy Elswijk, Markus Feldt, Menno de Haan, Norbert Hubin, Markus Kasper, Christoph Keller, Jean-Louis Lizon, David Mouillet, Alexey Pavlov, Pascal Puget, Sylvain Rochat, Bernardo Salasnich, Peter Steiner, Christian Thalmann, Rens Waters, François Wildi

Proceedings Volume 8151, 81510N (2011) https://doi.org/10.1117/12.893101

KEYWORDS: Polarization, Polarimetry, Planets, Sensors, Stars, Exoplanets, Modulators, Optical spheres, Coronagraphy, Demodulation

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Proceedings Article | 15 September 2011 Paper

Paper

The performance of the SPHERE sub-systems in the integration lab

François Wildi, Jean Luc Beuzit, Markus Feldt, David Mouillet, Kjetil Dohlen, Pascal Puget, Andrea Baruffolo, Julien Charton, Anthony Bocaletti, Riccardo Claudi, Anne Costille, Philippe Feautrier, Thierry Fusco, Raffaele Gratton, Markus Kasper, Maud Langlois, Patrice Martinez, Dino Mesa, David Le Mignant, Alexey Pavlov, Cyril Petit, Johannes Pragt, Patrick Rabou, Sylvain Rochat, Ronald Roelfsema, Jean-François Sauvage, Hans Martin Schmid, Eric Stadler, Claire Moutou

Proceedings Volume 8151, 81510M (2011) https://doi.org/10.1117/12.894389

KEYWORDS: Optical spheres, Sensors, Adaptive optics, Coronagraphy, Stars, Iterated function systems, Planets, Point spread functions, Polarimetry, Image filtering

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Proceedings Article | 22 July 2010 Paper

Paper

The innovative MAIT plan for the Matisse cold optics, comprising an unprecedented 220 cryogenic optical components

Eddy Elswijk, Ramón Navarro, Niels Tromp, Jan Kragt, Johan Pragt, Hiddo Hanenburg, Albert van Duin

Proceedings Volume 7739, 773915 (2010) https://doi.org/10.1117/12.856937

KEYWORDS: Cryogenics, Mirrors, Sensors, Optical components, Telescopes, Switches, Camera shutters, Optics manufacturing, Optical mounts, Interferometry

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Proceedings Article | 21 July 2010 Paper

Paper

OPTIMOS-EVE design trade-off analysis

Fanny Chemla, Gavin Dalton, Isabelle Guinouard, Johannes Pragt, Eric Sawyer, Paolo Spanò, Ian Tosh, Michael Andersen, Ramon Navarro, François Hammer, Lex Kaper

Proceedings Volume 7735, 77355L (2010) https://doi.org/10.1117/12.857519

KEYWORDS: Spectrographs, Microlens, Molybdenum, Cameras, Lawrencium, Sensors, Spectral resolution, Near infrared, Visible radiation, Lithium

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Proceedings Article | 20 July 2010 Paper

Paper

The ZIMPOL high-contrast imaging polarimeter for SPHERE: design, manufacturing, and testing

Ronald Roelfsema, Hans Martin Schmid, Johannes Pragt, Daniel Gisler, Rens Waters, Andreas Bazzon, Andrea Baruffolo, Jean-Luc Beuzit, Anthony Boccaletti, Julien Charton, Claudio Cumani, Kjetil Dohlen, Mark Downing, Eddy Elswijk, Markus Feldt, Charlotte Groothuis, Menno de Haan, Hiddo Hanenburg, Norbert Hubin, Franco Joos, Markus Kasper, Christoph Keller, Jan Kragt, Jean-Louis Lizon, David Mouillet, Aleksej Pavlov, Florence Rigal, Sylvain Rochat, Bernardo Salasnich, Peter Steiner, Christian Thalmann, Lars Venema, François Wildi

Proceedings Volume 7735, 77354B (2010) https://doi.org/10.1117/12.857045

KEYWORDS: Polarization, Charge-coupled devices, Sensors, Polarimetry, Modulators, Optical spheres, Planets, Mirrors, Stars, Modulation

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Proceedings Article | 15 July 2010 Paper

Paper

Project overview of OPTIMOS-EVE: the fibre-fed multi-object spectrograph for the E-ELT

Ramón Navarro, Fanny Chemla, Piercarlo Bonifacio, Hector Flores, Isabelle Guinouard, Jean-Michel Huet, Mathieu Puech, Frédéric Royer, Johannes Pragt, Gerben Wulterkens, Eric Sawyer, Martin Caldwell, Ian A. Tosh, Martin Whalley, Guy F. Woodhouse, Paolo Spanò, Paolo Di Marcantonio, Michael Andersen, Gavin Dalton, Lex Kaper, François Hammer

Proceedings Volume 7735, 77352L (2010) https://doi.org/10.1117/12.857638

KEYWORDS: Spectrographs, Galactic astronomy, Spectral resolution, Telescopes, Stars, Near infrared, Astronomical imaging, Planets, Sensors, Spectroscopes

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Proceedings Article | 20 August 2009 Paper

Paper

SPHERE: the VLT planet imager in the post FDR phase

Francois Wildi, Jean-Luc Beuzit, Markus Feldt, David Mouillet, Kjetil Dohlen, Pascal Puget, Andrea Baruffolo, Julien Charton, Pierre Baudoz, Anthony Boccaletti, Lyu Abe, Riccardo Claudi, Philippe Feautrier, Thierry Fusco, Raffaele Gratton, Norbert Hubin, Markus Kasper, Maud Langlois, Rainer Lenzen, Alexey Pavlov, Cyril Petit, Johan Pragt, Patrick Rabou, Ronald Roelfsema, Michel Saisse, Hans Martin Schmid, Eric Stadler, Claire Moutou, Massimo Turatto, Stephane Udry, Rens Waters, Thomas Henning, Anne-Marie Lagrange, Farrokh Vakili

Proceedings Volume 7440, 74400P (2009) https://doi.org/10.1117/12.826521

KEYWORDS: Optical spheres, Planets, Adaptive optics, Iterated function systems, Imaging systems, Coronagraphy, Stars, Polarimetry, Sensors, Exoplanets

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Proceedings Article | 25 July 2008 Paper

Paper

SPHERE ZIMPOL: overview and performance simulation

Christian Thalmann, Hans Schmid, Anthony Boccaletti, David Mouillet, Kjetil Dohlen, Ronald Roelfsema, Marcel Carbillet, Daniel Gisler, Jean-Luc Beuzit, Markus Feldt, Raffaele Gratton, Franco Joos, Christoph Keller, Jan Kragt, Johan Pragt, Pascal Puget, Florence Rigal, Frans Snik, Rens Waters, François Wildi

Proceedings Volume 7014, 70143F (2008) https://doi.org/10.1117/12.789158

KEYWORDS: Planets, Stars, Polarization, Coronagraphy, Polarimetry, Optical spheres, Adaptive optics, Signal detection, Sensors, Photons

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Proceedings Article | 25 July 2008 Paper

Paper

SPHERE: a planet finder instrument for the VLT

Jean-Luc Beuzit, Markus Feldt, Kjetil Dohlen, David Mouillet, Pascal Puget, Francois Wildi, Lyu Abe, Jacopo Antichi, Andrea Baruffolo, Pierre Baudoz, Anthony Boccaletti, Marcel Carbillet, Julien Charton, Riccardo Claudi, Mark Downing, Christophe Fabron, Philippe Feautrier, Enrico Fedrigo, Thierry Fusco, Jean-Luc Gach, Raffaele Gratton, Thomas Henning, Norbert Hubin, Franco Joos, Markus Kasper, Maud Langlois, Rainer Lenzen, Claire Moutou, Alexey Pavlov, Cyril Petit, Johan Pragt, Patrick Rabou, Florence Rigal, Ronald Roelfsema, Gérard Rousset, Michel Saisse, Hans-Martin Schmid, Eric Stadler, Christian Thalmann, Massimo Turatto, Stéphane Udry, Farrokh Vakili, Rens Waters

Proceedings Volume 7014, 701418 (2008) https://doi.org/10.1117/12.790120

KEYWORDS: Planets, Optical spheres, Stars, Coronagraphy, Sensors, Iterated function systems, Adaptive optics, Near infrared, Polarimetry, Calibration

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Proceedings Article | 23 July 2008 Paper

Paper

Piezo-driven adjustment of a cryogenic detector

Johan Pragt, Raymond van den Brink, Gabby Kroes, Niels Tromp, Jean-Baptiste Ochs

Proceedings Volume 7018, 70184N (2008) https://doi.org/10.1117/12.788396

KEYWORDS: Cryogenics, Sensors, Actuators, Motion measurement, Optical components, Temperature metrology, Environmental sensing, Control systems, Dielectrics, Spectroscopy

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Proceedings Article | 23 July 2008 Paper

Paper

Directly polished lightweight aluminum mirror

Rik ter Horst, Niels Tromp, Menno de Haan, Ramon Navarro, Lars Venema, Johan Pragt

Proceedings Volume 7018, 701808 (2008) https://doi.org/10.1117/12.788657

KEYWORDS: Mirrors, Polishing, Aluminum, Surface finishing, Cryogenics, Optics manufacturing, Lightweight mirrors, Diamond, Tolerancing, Surface roughness

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Proceedings Article | 24 September 2007 Paper

Paper

The SPHERE exoplanet imager: status report at PDR

Francois Wildi, Jean-Luc Beuzit, Markus Feldt, David Mouillet, Kjetil Dohlen, Pascal Puget, Andrea Baruffolo, Julien Charton, Jacopo Antichi, Pierre Baudoz, Anthony Boccaletti, Marcel Carbillet, Riccardo Claudi, Philippe Feautrier, Enrico Fedrigo, Thierry Fusco, Raffaele Gratton, Norbert Hubin, Markus Kasper, Maud Langlois, Rainer Lenzen, Claire Moutou, Alexey Pavlov, Cyril Petit, Johan Pragt, Patrick Rabou, Ronald Roelfsema, Michel Saisse, Hans-Martin Schmid, Eric Stadler, Christian Thalmann, Massimo Turatto, Stéphane Udry, Rens Waters, Thomas Henning, Anne-Marie Lagrange, Farrokh Vakili

Proceedings Volume 6691, 66910L (2007) https://doi.org/10.1117/12.734785

KEYWORDS: Optical spheres, Stars, Planets, Coronagraphy, Iterated function systems, Sensors, Imaging spectroscopy, Near infrared, Adaptive optics, Polarization

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Proceedings Article | 6 July 2006 Paper

Paper

X-shooter near-IR spectrograph arm: design and manufacturing methods

Ramon Navarro, Eddy Elswijk, Menno de Haan, Hiddo Hanenburg, Rik ter Horst, Pawel Kleszcz, Jan Kragt, Johan Pragt, Florence Rigal, Ronald Roelfsema, Ton Schoenmaker, Niels Tromp, Lars Venema, Paul Groot, Lex Kaper

Proceedings Volume 6273, 62733O (2006) https://doi.org/10.1117/12.670549

KEYWORDS: Prisms, Mirrors, Aluminum, Cryogenics, Optical components, Spectrographs, Optics manufacturing, Near infrared, Optical mounts, Data modeling

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Proceedings Article | 6 July 2006 Paper

Paper

A scalable pick-off technology for multi-object instruments

Peter Hastings, Suzanne Ramsay Howat, Peter Spanoudakis, Raymond van den Brink, Callum Norrie, David Clarke, K. Laidlaw, S. McLay, Johan Pragt, Hermine Schnetler, L. Zago

Proceedings Volume 6273, 62732X (2006) https://doi.org/10.1117/12.671644

KEYWORDS: Mirrors, Telescopes, Space telescopes, Motion controllers, Metrology, Cryogenics, Actuators, Control systems, Software development, Astronomy

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Proceedings Article | 28 June 2006 Paper

Paper

SPHERE: A planet finder instrument for the VLT

Kjetil Dohlen, Jean-Luc Beuzit, Markus Feldt, David Mouillet, Pascal Puget, Jacopo Antichi, Andrea Baruffolo, Pierre Baudoz, Alessandro Berton, Anthony Boccaletti, Marcel Carbillet, Julien Charton, Riccardo Claudi, Mark Downing, Christophe Fabron, Philippe Feautrier, Enrico Fedrigo, Thierry Fusco, Jean-Luc Gach, Raffaele Gratton, Norbert Hubin, Markus Kasper, Maud Langlois, Andy Longmore, Claire Moutou, Cyril Petit, Johan Pragt, Patrick Rabou, Gerard Rousset, Michel Saisse, Hans-Martin Schmid, Eric Stadler, Daphne Stamm, Massimo Turatto, Rens Waters, Francois Wildi

Proceedings Volume 6269, 62690Q (2006) https://doi.org/10.1117/12.671537

KEYWORDS: Coronagraphy, Stars, Adaptive optics, Optical spheres, Planets, Sensors, Iterated function systems, Polarimetry, Cameras, Polarization

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Proceedings Article | 28 June 2006 Paper

Paper

GLAS: engineering a common-user Rayleigh laser guide star for adaptive optics on the William Herschel Telescope

Gordon Talbot, Don Carlos Abrams, Nikolaos Apostolakos, Richard Bassom, Colin Blackburn, Maarten Blanken, Diego Cano Infantes, Alan Chopping, Kevin Dee, Nigel Dipper, Eddy Elswijk, Bernard Enthoven, Thomas Gregory, Rik ter Horst, Ron Humphreys, Jan Idserda, Paul Jolley, Sjouke Kuindersma, Richard McDermid, Tim Morris, Richard Myers, Sergio Pico, Johan Pragt, Simon Rees, Jürg Rey, Marcos Reyes, René Rutten, Ton Schoenmaker, Jure Skvarc, Niels Tromp, Simon Tulloch, Auke Veninga

Proceedings Volume 6272, 62722H (2006) https://doi.org/10.1117/12.669942

KEYWORDS: Telescopes, Adaptive optics, Control systems, Mirrors, Laser safety, Laser systems engineering, Laser guide stars, Pulsed laser operation, Charge-coupled devices, Sensors

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Proceedings Article | 20 October 2004 Paper

Paper

The PRIMA Astrometric Planet Search project

Andreas Quirrenbach, Thomas Henning, Didier Queloz, Simon Albrecht, Eric Bakker, Harald Baumeister, Peter Bizenberger, Hannes Bleuler, Rene Dandliker, Jeroen de Jong, Michel Fleury, Sabine Frink, Denis Gillet, Walter Jaffe, S. Hiddo Hanenburg, Saskia Hekker, Ralf Launhardt, Rudolf Le Poole, Charles Maire, Richard Mathar, Philippe Mullhaupt, Koji Murakawa, Francesco Pepe, Johan Pragt, Laurent Sache, Olivier Scherler, Damien Segransan, Johny Setiawan, Danuta Sosnowska, Robert Tubbs, Lars Venema, Karl Wagner, Luc Weber, Rolf Wuethrich

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551481

KEYWORDS: Planets, Stars, Error analysis, Interferometers, Metrology, Calibration, Exoplanets, Telescopes, Mirrors, Control systems

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Proceedings Article | 29 September 2004 Paper

Paper

Astron extreme lightweighting

Niels Tromp, Marco Drost, Johan Pragt

Proceedings Volume 5495, (2004) https://doi.org/10.1117/12.551940

KEYWORDS: Source mask optimization, Product engineering, Aluminum, Astronomy, Aerospace engineering, Space robots, Structural design, Cryogenics, Finite element methods, Optics manufacturing

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Proceedings Article | 7 March 2003 Paper

Paper

Characterication in the laboratory of VISIR, the mid-infrared imager and spectrometer for the VLT

Pierre-Olivier Lagage, Jan-Willem Pel, Arnaud Claret, Sieds Damstra, Didier Dubreuil, Gilles Durand, Eddy Elswijk, Philippe Galdemard, Arie de Jong, Gabby Kroes, Charles Lyraud, Eric Pantin, Johan Pragt, Yvon Rio, Anton Schoenmaker, Martial Authier, Jean Belorgey, Jean-Francois Gournay, Michel Lortholary, Yves Lussignol, Christian Veyssiere

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.461101

KEYWORDS: Spectroscopy, Sensors, Imaging systems, Mid-IR, Image quality, Mirrors, Telescopes, Detector arrays, Calibration, Spectral resolution

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Showing 5 of 56 publications

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