Dr. Alexandre Cabral Profile

Dr. Alexandre Cabral

Senior Researcher at Univ de Lisboa

SPIE Involvement:

Author

Publications (79)

Proceedings Article | 31 August 2022 Poster + Paper

Optical on-board metrology in the Athena x-ray mission

Manuel Abreu, David Silva, Alexandre Cabral, José Manuel Rebordão, Nuno Gonçalves, Sergio Mottini, João Costa Pinto, José Afonso, Israel Matute, Davide Oddenino

Proceedings Volume 12181, 1218149 (2022) https://doi.org/10.1117/12.2630023

KEYWORDS: Mirrors, Sensors, Telescopes, Electronics, Metrology, Image sensors, X-rays

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Proceedings Article | 29 August 2022 Paper

MOONS – Multi Object spectroscopy for the VLT: design and testing of the MOONS metrology system

Oscar A. Gonzalez, Ciaran Breen, Phil Rees, Alexandre Cabral, Michele Cirasuolo, Steven Beard, Ian Bryson, Manuel Parra, Jorge Sepulveda, Tzu-Chiang Shen, Alexis Tejeda, Leonardo Vanzi, Stephen Watson, Manuela Zoccali, Martin Black, Stephen Chittick

Proceedings Volume 12188, 121883S (2022) https://doi.org/10.1117/12.2629946

KEYWORDS: Metrology, Calibration, Commercial off the shelf technology, 3D metrology, Imaging systems, Photogrammetry, Target detection

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Proceedings Article | 29 August 2022 Presentation + Paper

MOONS – multi object spectroscopy for the VLT: overview and instrument integration update

Miriam Colling, Ralf Conzelmann, Francesco Dalessio, George Davidson, Françoise Delplancke-Ströbele, Martin Fisher, Vincenzo Forchi, Paolo Franzetti, Bianca Garilli, Adriana Gargiulo, Isabelle Guinouard, Pablo Gutierrez, Régis Haigron, Peter Hammersley, Valentin Ivanov, Derek Ives, Olaf Iwert, David King, Suzanne Kovacz, Oscar Gonzalez, Michele Cirasuolo, Philip Rees, Ian Bryson, Martin Black, William Taylor, Stephen Chittick, Jose Afonso, Simon Lilly, Hector Flores, Roberto Maiolino, Ernesto Oliva, Stephane Paltani, Leonardo Vanzi, Manuel Abreu, Jean-Philippe Amans, David Atkinson, Steven Beard, Andrea Belfiore, Ciaran Breen, Amelia Bayo, Andy Born, Alexandre Cabral, Lee Chapman, William Cochrane, João Coelho, Philippe Laporte, David Lee, Gianluca Li Causi, Alastair Macleod, Domingo Alvarez Mendez, António Oliveira, Ralf Palsa, Manuel Parra, Fernando Pedichini, Vicente Peña, Monika Petr-Gotzens, Myriam Rodrigues, Frédéric Royer, Pedro Santos, Jorge Sepulveda, Robyn Sharman, Tzu-Chiang Shen, Michael Sordet, Jonathan Strachan, Graham Tait, Alexis Tejeda, Andrea Tozzi, Norman O'Malley, Chris Waring, Stephen Watson, Bart Willemse, Xiaofeng Gao, Yanbin Yang, Manuela Zoccali

Proceedings Volume 12184, 1218412 (2022) https://doi.org/10.1117/12.2629932

KEYWORDS: Cameras, Calibration, Spectrographs, Metrology, Telescopes, Image quality, Astronomical imaging

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Proceedings Article | 29 August 2022 Presentation + Paper

ANDES, the high resolution spectrograph for the ELT: science case, baseline design and path to construction

M. Abreu, V. Adibekyan, V. Alberti, S. Albrecht, J. Alcaniz, M. Aliverti, C. Allende Prieto, J. D. Alvarado Gómez, P. J. Amado, M. Amate, M. I. Andersen, E. Artigau, C. Baker, A. Balestra, S. A. Barnes, F. Baron, S. C. C. Barros, S. M. Bauer, M. Beaulieu, O. Bellido-Tirado, B. Benneke, T. Bensby, E. A. Bergin, K. Biazzo, A. Bik, J. L. Birkby, N. Blind, I. Boisse, E. Bolmont, M. Bonaglia, F. Borsa, A. Brandeker, W. Brandner, C. H. Broeg, M. Brogi, D. Brousseau, A. Brucalassi, J. Brynnel, L. A. Buchhave, D. F. Buscher, A. Cabral, G. Calderone, R. Calvo-Ortega, B. L. Canto Martins, L. Carbonaro, G. Chauvin, B. Chazelas, A.-L. Cheffot, Y. S. Cheng, A. Chiavassa, L. Christensen, R. Cirami, N. J. Cook, R. J. Cooke, I. Coretti, S. Covino, N. Cowan, G. Cresci, S. Cristiani, V. Cunha Parro, G. Cupani, P. Huke, S. Järvinen, A. Järvinen, A. Kaminski, A. Korn, D. Kouach, G. Kowzan, L. Kreidberg, M. Landoni, A. Lanotte, A. Lavail, J. Li, J. Liske, C. Lovis, S. Lucatello, D. Lunney, M. MacIntosh, N. Madhusudhan, L. Magrini, R. Maiolino, S. G. Sousa, E. Stempels, K. G. Strassmeier, A. Suárez Mascareño, A. Sulich, X. Sun, N.R. Tanvir, F. Tenegi-Sanginés, S. Thibault, S. J. Thompson, M. Turbet, P. Vallée, R. Varas, K. Venn, J.-P. Véran, A. Verma, M. Viel, G. Wade, C. Waring, M. Weber, J. Weder, B. Wehbe, J. Weingrill, M. Woche, X. Bonfils, M. Xompero, E. Zackrisson, A. Zanutta, M. R. Zapatero Osorio, M. Zechmeister, J. Zimara, A. Fontana, T. Fusco, J. Morin, V. Baldini, C. Feruglio, A. Tozzi, A. Marconi, V. D'Odorico, I. de Castro Leão, A. De Cia, J. R. De Medeiros, F. Debras, M. Debus, O. Demangeon, M. Dessauges-Zavadsky, P. Di Marcantonio, F. Dionies, R. Doyon, J. Dunn, D. Ehrenreich, J. P. Faria, F. Cantalloube, M. Fisher, M. Fumagalli, J. Fynbo, O. Gabella, W. Gaessler, E. Gallo, X. Gao, L. Genolet, M. Genoni, P. Giacobbe, E. Giro, R. S. Gonçalves, O. Gonzalez, J. I. González Hernández, F. Gracia Témich, M. G. Haehnelt, C. Haniff, A. Hatzes, R. Helled, H.J. Hoeijmakers, L. Malo, A. Man, T. Marquart, E. L. Marques, A. M. Martins, C. J. A. P. Martins, P. Maslowski, C. Mason, E. Mason, R. A. McCracken, P. Mergo, G. Micela, T. Mitchell, P. Mollière, M. Monteiro, D. Montgomery, C. Mordasini, A. Mucciarelli, M. T. Murphy, M. N'Diaye, B. Neichel, A. T. Niedzielski, E. Niemczura, L. Nortmann, P. Noterdaeme, N. Nunes, L. Oggioni, E. Oliva, H. Önel, L. Origlia, G. Östlin, E. Palle, P. Papaderos, G. Pariani, J. Peñate Castro, F. Pepe, L. Perreault Levasseur, P. Petit, L. Pino, J. Piqueras, A. Pollo, K. Poppenhaeger, A. Quirrenbach, E. Rauscher, R. Rebolo, E. M. A. Redaelli, S. Reffert, D. T. Reid, A. Reiners, P. Richter, M. Riva, S. Rivoire, C. Rodríguez-López, I. U. Roederer, D. Romano, S. Rousseau, J. Rowe, S. Salvadori, N. Santos, P. Santos Diaz, J. Sanz-Forcada, M. Sarajlic, J.-F. Sauvage, S. Schäfer, R. P. Schiavon, T. M. Schmidt, C. Selmi, S. Sivanandam, M. Sordet, R. Sordo, F. Sortino, D. Sosnowska

Proceedings Volume 12184, 1218424 (2022) https://doi.org/10.1117/12.2628689

KEYWORDS: Physics, Spectrographs, Stars, Astronomy, Galactic astronomy, Astrophysics, Exoplanets, Planets, Spectral resolution, Absorption

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Proceedings Article | 29 August 2022 Presentation + Paper

First light of NIRPS, the near-infrared adaptive-optics assisted high resolution spectrograph for the ESO 3.6m

Nolan Grieves, Étienne Artigau, Felix Gracia Temich, Yolanda Frensch, François Wildi, François Bouchy, René Doyon, Nicolas Blind, Ludovic Genolet, Michael Sordet, Alex Segovia, Lison Malo, Jonathan St-Antoine, Philippe Vallée, Jose Luis Rasilla, Anne-Sophie Poulin-Girard, Denis Brousseau, Danuta Sosnowska, Vlad Reshetov, Frédérique Baron, Simon Thibault, Sébastien Bovay, Gaspare Lo Curto, Norbert Hubin, Gérard Zins, Céline Peroux, Alexandre Cabral

Proceedings Volume 12184, 121841H (2022) https://doi.org/10.1117/12.2630016

KEYWORDS: Spectrographs, Adaptive optics, Stars, Telescopes, Planets, Calibration, Temperature metrology, Point spread functions, Spectral resolution, Infrared radiation

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Proceedings Article | 29 August 2022 Poster + Paper

NIRPS – the Near Infra-Red Planet Searcher: design, integration, and tests of the atmospheric dispersion corrector

Gaspare Lo Curto, Gerard Zins, Johann Kolb, Alexandre Cabral, Bachar Wehbé, Nicolas Blind, João Coelho, Manuel Abreu, Alex Segovia, Michael Sordet, François Wildi, François Bouchy, Nuno Santos, René Doyon

Proceedings Volume 12184, 121844M (2022) https://doi.org/10.1117/12.2628930

KEYWORDS: Prisms, Planets, Telescopes, Adaptive optics, Stars, Glasses, Spectrographs, Atmospheric modeling

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Proceedings Article | 29 August 2022 Poster + Paper

MOONS – multi object spectroscopy for the VLT: integration and tests of the field corrector and the rotating front end

Paolo Spanò, Raziye Artan, Stephen Chittick, Alexandre Cabral, Manuel Abreu, João M. Coelho, Pedro Santos, António Oliveira, Inês Leite, José Afonso, Phil Rees, David Lee, Oscar González, Stephen Watson, William Taylor, Ian Bryson, Isabelle Guinouard, Michele Cirasuolo

Proceedings Volume 12184, 121846P (2022) https://doi.org/10.1117/12.2628923

KEYWORDS: Metrology, Telescopes, Cameras, Spectrographs, Calibration, Lenses, Astronomical imaging, Spectroscopy

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Proceedings Article | 29 August 2022 Paper

NIRPS front-end: design, performance, and lessons learned

A. de Meideros Martins, F. Wildi, L. Genolet, M. Sordet, A. Cabral, S. Bovay, N. Blind, U. Conod, F. Bouchy, D. Brousseau, S. Thibault, G. Zins, B. Wehbe, J. Kolb, R. Schnell, A. Segovia

Proceedings Volume 12184, 121844H (2022) https://doi.org/10.1117/12.2628321

KEYWORDS: Adaptive optics, Optical fibers, Cameras, Telescopes, Calibration, Stars, Real-time computing, MATLAB, Spectrographs, Planets

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Proceedings Article | 27 August 2022 Poster + Paper

Ground calibration of the Ariel space telescope: optical ground support equipment design and description

Neil Bowles, Subhajit Sarkar, Alexandre Cabral, Manuel Abreu, Tim van Kempen, Matthijs Krijger, Robert Spry, Rory Evans, Robert Watkins, Cédric Pereira, E. Pascale, Paul Eccleston, Chris Pearson, Lucile Desjonquères, Georgia Bishop, Andrew Caldwell, Andrea Moneti, Mauro Focardi, Giuseppe Malaguti, Ioannis Argyriou, Giovanna Tinetti, Keith Nowicki

Proceedings Volume 12180, 1218049 (2022) https://doi.org/10.1117/12.2627049

KEYWORDS: Calibration, Sensors, Mirrors, Projection systems, Cryogenics, Telescopes, Beam expanders, Spectroscopy, Monochromators, Signal detection

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This paper describes the Optical Ground Support Equipment (OGSE) that is being developed for the payload level testing of the Ariel Space Telescope. Ariel has been adopted as ESA’s “M4” mission in its Cosmic Visions Programme and will launch in 2029 to the second Earth-Sun Lagrange point. During four years of operation the Ariel payload (PL – the cryogenic payload module plus warm units) will perform precise transit spectroscopy of approximately 1000 known exoplanetary atmospheres using a 1.1 m × 0.7 m telescope coupled to two instruments: the Fine Guidance Sensor (FGS) and the Ariel Infrared Spectrometer (AIRS). These instruments provide three spectrometric channels that cover 1.0 to 7.8 μm wavelength range and three photometric channels between 0.5 and 1.1 μm. The Ariel OGSE will verify the optical and radiometric performance of the integrated Ariel PL under vacuum and cryogenic (<40 K) test conditions within the limitations of operation under Earth’s gravity and vibration environments. To achieve these verification requirements the OGSE is integrated with the main Ariel ground test 5 m thermal vacuum chamber. The test chamber contains a cryogenic enclosure (the Cryogenic Test Rig) that surrounds the PL and the OGSE itself comprises of four subsystems. (1) A cryogenic vacuum chamber and integrating sphere illumination module that is fed by visible, near infrared and thermal infrared sources. The illumination module is mounted external to the Ariel test chamber and coupled via a vacuum feedthrough that relays a 22 mm diameter test beam into the Cryogenic Test Rig. The test beam is then relayed using (2) an injection module that steers the beam to maintain alignment during cool-down and scan the Ariel telescope field of view. The beam is then expanded to partially illuminate the Ariel telescope primary mirror using an (3) ~0.3 m diameter target projector collimating mirror. The final optical component of the OGSE is a (4) beam expander placed on the Ariel common optical bench to compensate for the sub-aperture illumination of the primary and to ensure that the spectrometer modules provide illumination with correct cone angles during ground testing. It is planned to use the OGSE in 2026 for a full range of calibration and verification tests of the end-to-end telescope and instrument performance, including detectors, field of view and alignment. These tests will then ensure that Ariel meets it challenging photometric and spectral performance requirements.

Proceedings Article | 25 August 2022 Presentation + Paper

ANDES, the high resolution spectrograph for the ELT: project management and system engineering approaches for mastering its preliminary design phase

P. Di Marcantonio, A. Zanutta, A. Marconi, M. Abreu, V. Alberti, M. Aliverti, M. Andersen, V. Baldini, A. Balestra, F. Baron, J. Brynnel, A. Cabral, B. Chazelas, R. Cirami, I. Coretti, E. Gallo, E. Giro, W. Gaessler, O. Gonzalez, P. Huke, D. Kouach, I. Leão, D. Lunney, M. Macintosh, P. Masłowski, M. Monteiro, E. Oliva, G. Pariani, E. Pinna, E. M. A. Redaelli, C. Selmi, F. Sortino, E. H. C. Stempels, B. Wehbe, M. Xompero, J. Zimara, M. Riva, L. Origlia

Proceedings Volume 12187, 1218702 (2022) https://doi.org/10.1117/12.2628914

KEYWORDS: Spectrographs, Systems engineering, Astronomy, Physics, Exoplanets

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SPIE Journal Paper | 28 July 2021

Simple concept for atmospheric dispersion corrector on-sky commissioning tests

Alexandre Cabral, Bachar Wehbé

JATIS, Vol. 7, Issue 03, 035003, (July 2021) https://doi.org/10.1117/12.10.1117/1.JATIS.7.3.035003

KEYWORDS: Prisms, Atmospheric modeling, Spectrographs, Cameras, Sensors, Quantum efficiency, Data modeling, Atmospheric corrections, Atmospheric optics, Telescopes

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SPIE Journal Paper | 17 June 2021

Measurement of the refractive index of glass with 10−4 level accuracy based on the lateral displacement method

Inês Leite, Alexandre Cabral, João M. Coelho

OE, Vol. 60, Issue 06, 064101, (June 2021) https://doi.org/10.1117/12.10.1117/1.OE.60.6.064101

KEYWORDS: Glasses, Refractive index, Cameras, Light sources, Interferometry, Collimation, Optical engineering, Error analysis, Sensors, Calibration

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Proceedings Article | 13 December 2020 Poster + Paper

A white light collimator for Plato camera integration support

Manuel Abreu, Alexandre Cabral, David Castro Alves, João M.P. Coelho, Pedro Santos, B. Vandenbussche, L. Clermont, Ann Baeke

Proceedings Volume 11443, 114434T (2020) https://doi.org/10.1117/12.2561402

KEYWORDS: Collimators, Cameras, Telescopes, Light, Wavefronts, Manufacturing

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Proceedings Article | 13 December 2020 Presentation + Paper

ELT-HIRES, the high resolution spectrograph for the ELT: the Phase A study and the path to construction

A. Marconi , M. Amate, E. Artigau, B. Benneke, E. Bergin, P. Berio, N. Bezawada, I. Boisse, X. Bonfils, A. Cabral, B. Canto Martins, S. Covino, G. Cresci, S. Cristiani, G. Cupani, V. D'Odorico, I. de Castro Leão, J. de Medeiros, I. Di Varano, R. Doyon, H. Drass, P. Figueira, E. Gallo, M. Genoni, J. González Hernández, R. Gratton, J. Hlavacek-Larrondo, I. Hughes, P. Huke, A. Humphrey, H. Kjeldsen, M. Landoni, C. Lovis, D. Lunney, L. Malo, C. J. A. P. Martins, P. Maslowski, G. Micela, P. Molaro, C. Mordasini, E. Niemczura, B. Nisini, E. Oliva, P. Parr-Burman, J. Peñate, N. Piskunov, A. Pollo, J. Rasilla, R. Rebolo, A. Reiners, D. Romano, S. Rousseau, N. Sanna, F. Sortino, K. Strassmeier, A. Tozzi, S. Udry, L. Valenziano, L. Vanzi, M. Weber, M. Abreu, V. Adibekyan, M. Aliverti, C. Allende Prieto, P. Amado, S. Augusto, S. Barros, S. Becerril, F. Bouchy, C. Broeg, R. Calvo-Ortega, B. Chazelas, A. Chiavassa, L. Christensen, R. Cirami, I. Coretti, V. Cunha Parro, M. de Souza, P. Di Marcantonio, A. Fragoso, J. Fynbo, M. Haehnelt, C. Hansen, A. Korn, D. Kouach, J. Liske, R. Maiolino, T. Marquart, E. Mason, J. Monnier, M. Monteiro, T. Morris, A. Mucciarelli, G. Murray, A. Niedzielski, N. Nunes, L. Origlia, E. Pallé, G. Pariani, L. Pasquini, F. Pepe, G. Pietrzynski, E. Pinna, P. Rees, M. Riva, M. Sarajlic, T.-C. Shen, D. Sosnowska, S. Sousa, E. Stempels, F. Tenegi, M. Woche, M. Xompero, E. Zackrisson, M. R. Zapatero Osorio

Proceedings Volume 11447, 1144726 (2020) https://doi.org/10.1117/12.2560489

KEYWORDS: Spectrographs, Large telescopes, Telescopes, Exoplanets, Atmospheric sciences, Atmospheric sensing, Spectral resolution

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Proceedings Article | 13 December 2020 Poster + Paper

MOONS, the next ESO VLT’s multi-object spectrograph: the field corrector and the rotating front end

Alexandre Cabral, Manuel Abreu, João M. Coelho, Pedro Santos, Antonio Oliveira, Jose Afonso, Phil Rees, William Taylor, Stephen Watson, David Lee, David Atkinson, Alasdair Fairley, Michele Cirasuolo, Isabelle Guinouard, Inês Leite, Ian Bryson, Óscar González

Proceedings Volume 11447, 114478D (2020) https://doi.org/10.1117/12.2561412

KEYWORDS: Spectrographs, Astronomical imaging, Telescopes, Large telescopes, Optical fibers, Robotics, Cryogenics, Interfaces, Metrology, Calibration

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Proceedings Article | 13 December 2020 Paper

Crescent MOONS: an update on the ongoing construction of the new VLT's multi-object spectrograph

Michele Cirasuolo, Alasdair Fairley, Phil Rees, William Taylor, Jose Afonso, Roberto Maiolino, Chris Evans, Hector Flores, Ernesto Oliva, Stephane Paltani, Simon Lilly, Leonardo Vanzi, Oscar Gonzalez, Ian Bryson, Manuel Abreu, Steven Beard, Clementine Béchet, Martin Black, David Boettger, Saskia Brierley, David Buscher, Marcella Carollo, João Coelho, Francesco Dalessio, Louise Dauvin, George Davidson, Giles Fasola, Martin Fisher, Mauricio Flores, Adriana Gargiulo, Julien Gaudemard, Pablo Gutierrez, Régis Haigron, Chris Haniff, Derek Ives, Olaf Iwert, David King, Charles Maire, Basile-Thierry Melse, Livia Origlia, Ian Parry, Florent Reix, Felipe Rojas, Tzu-Chiang Shen, Michael Sordet, Xaiowei Sun, Graham Tait, Simon Tulloch, Chris Waring, Stephen Watson, Jean-Philippe Amans, David Atkinson, Andrea Belfiore, Alexandre Cabral, William Cochrane, Miriam Colling, Ralf Conzelmann, Debora Ferruzzi, Bianca Garilli, Isabelle Guinouard, Suzanne Kovacz, Philippe Laporte, David Lee, Gianluca Li Causi, Yerko Luco, Alastair Macleod, António Oliveira, Fernando Pedichini, Roberto Piazzesi, Myriam Rodrigues, Frédéric Royer, Pedro Santos, Robin Schnell, Jonathan Strachan, Andrea Tozzi, Lauren Von Dran, Brian Woodward, Yanbin Yang

Proceedings Volume 11447, 1144717 (2020) https://doi.org/10.1117/12.2561229

KEYWORDS: Astronomical imaging, Spectrographs, Large telescopes, Observatories, Optical fibers, Robotics, Astronomy, Telescopes

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Proceedings Article | 13 December 2020 Poster + Paper

Final characteristics and performances of the fibres of MOONS

Isabelle Guinouard, Jean-Philippe Amans, David Horville, David Lee, Alexandre Cabral, Phil Rees, Stephen Watson, William Taylor, Hector Flores

Proceedings Volume 11451, 114516J (2020) https://doi.org/10.1117/12.2560635

KEYWORDS: Spectrographs, Astronomical imaging, Large telescopes, Cryogenics, Microlens

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Proceedings Article | 13 December 2020 Poster + Paper

A simple concept for atmospheric dispersion correctors on-sky commissioning tests

Alexandre Cabral, Bachar Wehbé

Proceedings Volume 11447, 114475W (2020) https://doi.org/10.1117/12.2562463

KEYWORDS: Atmospheric corrections, Cameras, Refraction, Telescopes, Prisms

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Proceedings Article | 13 December 2020 Poster + Paper

A novel method for on-sky measurements of atmospheric dispersion

B. Wehbe, A. Cabral, G. Àvila

Proceedings Volume 11447, 114476R (2020) https://doi.org/10.1117/12.2561411

KEYWORDS: Atmospheric modeling, Zemax, Refractor telescopes, Telescopes, Refraction, Point spread functions, Spectroscopy, Data acquisition, Spectrographs

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Proceedings Article | 3 October 2019 Paper

Measurement of the refractive index of glass by optical metrology

Inês Leite, Alexandre Cabral

Proceedings Volume 11207, 112072P (2019) https://doi.org/10.1117/12.2530891

KEYWORDS: Glasses, Refractive index, Interferometry, Optics manufacturing, Reflection, Solar concentrators, Interferometers, Optical metrology, Solar cells, Prisms

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Proceedings Article | 3 October 2019 Paper

ESPRESSO Coudé-Train: ESO's VLT working as 16-metre telescope

Alexandre Cabral, Manuel Abreu, João Coelho, Gerardo Ávila, Marco Riva, Denis Mégevand, Nuno Santos, Francesco Pepe

Proceedings Volume 11207, 112070V (2019) https://doi.org/10.1117/12.2527260

KEYWORDS: Telescopes, Prisms, Lenses, Mirrors, Spectrographs, Beam splitters, Image quality, Optical components, Observatories

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Proceedings Article | 3 October 2019 Paper

The development of an optical design tool for atmospheric dispersion correction

B. Wehbe, A. Cabral, G. Ávila

Proceedings Volume 11207, 112070P (2019) https://doi.org/10.1117/12.2527103

KEYWORDS: Glasses, Prisms, Atmospheric modeling, Atmospheric corrections, Atmospheric optics, Optical design, Spectrographs, Large telescopes, Telescopes, Astronomy

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Proceedings Article | 3 October 2019 Paper

Atmospheric dispersion correction: model requirements and impact on radial velocity measurements

B. Wehbe, A. Cabral, P. Figueira, G. Ávila

Proceedings Volume 11207, 112070U (2019) https://doi.org/10.1117/12.2527256

KEYWORDS: Atmospheric modeling, Data modeling, Atmospheric corrections, Spectrographs, Dispersion, Data archive systems, Instrument modeling, Telescopes, Prisms, Data analysis

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Proceedings Article | 16 July 2018 Paper

ELT-HIRES, the High Resolution Spectrograph for the ELT: the design of the Front End

Alexandre Cabral, João Coelho, Manuel Abreu, Alessandro Marconi, Luca Valenziano, Ernesto Oliva, Marco Riva, Matteo Aliverti

Proceedings Volume 10702, 107029T (2018) https://doi.org/10.1117/12.2313554

KEYWORDS: Spectrographs, Calibration, Polarimetry, Telescopes, Image quality, Large telescopes

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Proceedings Article | 13 July 2018 Presentation + Paper

Rising MOONS: an update on the VLT’s next multi-object spectrograph as it begins to grow

William Taylor, Michele Cirasuolo, Jose Afonso, Marcella Carollo, Chris Evans, Hector Flores, Roberto Maiolino, Ernesto Oliva, Stephane Paltani, Leonardo Vanzi, Manuel Abreu, Jean-Phillipe Amans, David Atkinson, Joe Barrett, Steven Beard, Celementine Béchet, Martin Black, David Boettger, Saskia Brierley, David Buscher, Alexandre Cabral, William Cochrane, João Coelho, Miriam Colling, Ralf Conzelmann, Francesco Dalessio, Louise Dauvin, George Davidson, Holger Drass, Rolando Dünner, Alasdair Fairley, Giles Fasola, Debora Ferruzzi, Martin Fisher, Mauricio Flores, Bianca Garilli, Julien Gaudemard, Oscar Gonzalez, Isabelle Guinouard, Pablo Gutierrez, Régis Haigron, Peter Hammersley, Chris Haniff, Mahmoud Hayati, Derek Ives, Olaf Iwert, Philippe Laporte, David Lee, Gianluca Li Causi, Yerko Luco, Alastair Macleod, Vincenzo Mainieri, Charles Maire, Basile-Thierry Melse, Álvaro Valenzuela Navarro, Johannes Nix, António Oliveira, Livia Origlia, Ian Parry, Fernando Pedichini, Roberto Piazzesi, Phil Rees, Florent Reix, Myriam Rodrigues, Felipe Rojas, Stefano Rota, Frédéric Royer, Pedro Santos, Robin Schnell, Tzu-Chiang Shen, Michael Sordet, Jonathan Strachan, Xiaowei Sun, Graham Tait, Miguel Torres, Andre Tozzi, Simon Tulloch, Lauren Von Dran, Chris Waring, Stephen Watson, Brian Woodward, Yanbin Yang

Proceedings Volume 10702, 107021G (2018) https://doi.org/10.1117/12.2313403

KEYWORDS: Cameras, Optical fibers, Telescopes, Sensors, Metrology, Calibration, Spectrographs, Galactic astronomy, Astronomical imaging, Stars

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Proceedings Article | 6 July 2018 Presentation + Paper

ELT-HIRES, the high resolution spectrograph for the ELT: results from the Phase A study

P. Di Marcantonio, R. Maiolino , E. Oliva, L. Origlia, M. Riva, L. Valenziano, C. Allende Prieto, P. Amado, M. Amate, S. Becerril, N. Bezawada, I. Boisse, F. Bouchy, A. Cabral, B. Chazelas, R. Cirami, I. Coretti, S. Cristiani, G. Cupani, V. D'Odorico, M. A. F. de Souza, A. Marconi, I. de Castro Leão, J. R. de Medeiros, I. Di Varano, H. Drass, P. Figueira, A. B. Fragoso, J. P. U. Fynbo, M. Genoni, J. I. González Hernández, I. Hughes, P. Huke, H. Kjeldsen, A. Korn, M. Landoni, J. Liske, C. Lovis, C. J. A. P. Martins, E. Mason, M. Monteiro, T. Morris, A. Niedzielski, E. Pallé, P. Parr-Burman, F. Pepe, N. Piskunov, J. L. Rasilla, R. Rebolo, S. Rousseau, N. Sanna, N. Santos, T.-C. Shen, F. Sortino, D. Sosnowska, S. Sousa, E. Stempels, K. Strassmeier, F. Tenegi, A. Tozzi, S. Udry, L. Vanzi, M. Weber, M. Woche, M. Xompero, E. Zackrisson, S. Augusto, V. C. Parro, G. Murray, P. Rees, M. Haehnelt, T. Marquart

Proceedings Volume 10702, 107021Y (2018) https://doi.org/10.1117/12.2311664

KEYWORDS: Spectrographs, Stars, Physics, Galactic astronomy, Astronomy, Exoplanets, Spectral resolution, Calibration, Absorption, Spectroscopy

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Proceedings Article | 13 April 2018 Paper

High-precision optical metrology for Darwin: design and performance

Bertrand Calvel, Isabel Cabeza, Alexandre Cabral, Eberhard Manske, José Rebordão, Rainer Sesselmann, Zoran Sodnik, Ad Verlaan

Proceedings Volume 10568, 105682N (2018) https://doi.org/10.1117/12.2500126

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Proceedings Article | 21 November 2017 Open Access

An interferometer for high-resolution optical surveillance from GEO - internal metrology breadboard

L. Bonino, F. Bresciani, G. Piasini, M. Pisani, A. Cabral, J. Rebordão, F. Musso

Proceedings Volume 10567, 1056734 (2017) https://doi.org/10.1117/12.2308168

KEYWORDS: Metrology, Interferometers, Sensors, Control systems, Fringe analysis, Laser metrology, Space operations, Surveillance, Visibility, Retroreflectors

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Proceedings Article | 21 November 2017 Open Access

An interferometer for high-resolution optical surveillance from geostationary orbit - space system study

S. Roose, M. Pisani, J. Costal, P. Lima, L. Bonino, F. Bresciani, G. Piasini, C. Flebus, J.-H. Lecat, A. Cabral, J. Rebordão, C. Proença, F. Musso

Proceedings Volume 10567, 1056733 (2017) https://doi.org/10.1117/12.2308169

KEYWORDS: Interferometers, Sensors, Space telescopes, Telescopes, Metrology, Point spread functions, Mirrors, Surveillance, Modulation transfer functions, Control systems design

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Proceedings Article | 21 November 2017 Open Access

An interferometer for high-resolution optical surveillance from geostationary orbit

L. Bonino, F. Bresciani, S. Roose, M. Pisani, A. Cabral, C. Proença, J. Costal, N. Loix, G. Piasini, C. Flebus, J.-H. Lecat, J. Rebordão, P. Lima, F. Musso

Proceedings Volume 10567, 1056708 (2017) https://doi.org/10.1117/12.2308170

KEYWORDS: Space telescopes, Telescopes, Interferometers, Sensors, Mirrors, Metrology, Surveillance, Optics manufacturing, Infrared telescopes, Point spread functions

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Proceedings Article | 20 November 2017 Open Access

Technique for long and absolute distance measurement based on laser pulse repetition frequency sweeping

Michael Jost, D. Castro Alves, Manuel Abreu, A. Cabral, J.M. Rebordão

Proceedings Volume 10564, 1056421 (2017) https://doi.org/10.1117/12.2309077

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Proceedings Article | 1 September 2017 Paper

NIRPS: an adaptive-optics assisted radial velocity spectrograph to chase exoplanets around M-stars

F. Wildi, F. Bouchy, R. Doyon, E. Artigau, N. Blind, V. Reshetov, C. Melo, L. Saddlemyer, D. Brousseau, A. Cabral, B. Delabre, U. Conod, L. Genolet, J. Hagelberg, U. Käufl, L. Malo, J. L. Rasilla, M. Sarajlic, M. Sordet, T. Bandy, S. Bovay, Ph. Vallée, F. Pepe, X. Delfosse, J. R. de Medeiros, R. Rebolo, Ch. Broeg, I. Boisse, O. Hernandez, S. Thibault, P. Figueira, N. C. Santos, J. I. González Hernández, A. Segovilla, W. Benz

Proceedings Volume 10400, 1040018 (2017) https://doi.org/10.1117/12.2275660

KEYWORDS: Spectrographs, Adaptive optics, Planets, Exoplanets, Velocity measurements, Stars, Spectroscopy, Optical fibers, Space operations, Interference (communication)

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Since 1st light in 2002, HARPS has been setting the standard in the exo-planet detection by radial velocity (RV) measurements[1]. Based on this experience, our consortium is developing a high accuracy near-infrared RV spectrograph covering YJH bands to detect and characterize low-mass planets in the habitable zone of M dwarfs. It will allow RV measurements at the 1-m/s level and will look for habitable planets around M- type stars by following up the candidates found by the upcoming space missions TESS, CHEOPS and later PLATO. NIRPS and HARPS, working simultaneously on the ESO 3.6m are bound to become a single powerful high-resolution, high-fidelity spectrograph covering from 0.4 to 1.8 micron. NIRPS will complement HARPS in validating earth-like planets found around G and K-type stars whose signal is at the same order of magnitude than the stellar noise. Because at equal resolving power the overall dimensions of a spectrograph vary linearly with the input beam étendue, spectrograph designed for seeing-limited observations are large and expensive. NIRPS will use a high order adaptive optics system to couple the starlight into a fiber corresponding to 0.4” on the sky as efficiently or better than HARPS or ESPRESSO couple the light 0.9” fiber. This allows the spectrograph to be very compact, more thermally stable and less costly. Using a custom tan(θ)=4 dispersion grating in combination with a start-of-the-art Hawaii4RG detector makes NIRPS very efficient with complete coverage of the YJH bands at 110’000 resolution. NIRPS works in a regime that is in-between the usual multi-mode (MM) where 1000’s of modes propagates in the fiber and the single mode well suited for perfect optical systems. This regime called few-modes regime is prone to modal noise- Results from a significant R and D effort made to characterize and circumvent the modal noise show that this contribution to the performance budget shall not preclude the RV performance to be achieved.

Proceedings Article | 22 August 2017 Paper

Mode-locked semiconductor laser for long and absolute distance measurement based on laser pulse repetition frequency sweeping: a comparative study between three types of lasers

J. M. Rebordão, D. Castro Alves, Manuel Abreu, Alexandre Cabral

Proceedings Volume 10453, 104530E (2017) https://doi.org/10.1117/12.2271553

KEYWORDS: Semiconductor lasers, Metrology, Mode locking, Pulsed laser operation, Laser metrology, Laser stabilization, Distance measurement, Laser sources

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Proceedings Article | 9 August 2016 Paper

Implementation and performance of the metrology system for the multi-object optical and near-infrared spectrograph MOONS

Holger Drass, Leonardo Vanzi, Miguel Torres-Torriti, Rolando Dünner , Tzu-Chiang Shen, Francisco Belmar, Jonathan Antognini, Mauricio Flores, Alexandre Cabral, Mahmoud Hayati, Michele Cirasuolo, Manuel Abreu, Phil Rees, Alasdair Fairley, Stephen Watson, Lousie Dauvin, Tomás Staig, Yerko Luco, Steven Beard, David Montgomery, William Taylor, Clémentine Béchet, David Boettger

Proceedings Volume 9908, 99088E (2016) https://doi.org/10.1117/12.2232654

KEYWORDS: Metrology, Spectrographs, Cameras, Astronomical imaging, Time metrology, Calibration, Electroluminescent displays, Target detection, Staring arrays, Telescopes

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Proceedings Article | 9 August 2016 Paper

EELT-HIRES the high-resolution spectrograph for the E-ELT

P. Di Marcantonio, R. Maiolino, A. Niedzielski, A. Reiners, A. Hatzes, C. Allende Prieto, B. Canto Martins, J. Coelho, E. Delgado-Mena, A. C. Glasse, A. Marconi, F. Bouchy, S. Cristiani, J. R. de Medeiros, J. P. Fynbo, M. Haehnelt, E. Oliva, L. Origlia, P. Parr-Burman, F. Pepe, N. Piskunov, R. Rebolo Lopez, M. Riva, N. Santos, K. Strassmeier, S. Udry, L. Valenziano, L. Vanzi, F. M. Zerbi, P. J. Amado, I. Boisse, A. Chiavassa, I. Di Varano, V. D'Odorico, J. Liske, C. Lovis, C. J. A. Martins, H. Nicklas, Didier Queloz, A. Quirrenbach, M. Abreu, V. Adibekyan, W. Benz, X. Bonfils, D. Buscher, A. Cabral, P. Figueira, M. Fisher, C. Haniff, P. Huke, A. Korn, I. C. Leão, I. Matute, R. McCracken, M. J. P. F. Monteiro, S. Morris, T. Morris, N. Nunes, E. Palle, V. Parro, I. Parry, D. Reid, W. Seifert, S. Sousa, H. Stempels, X. Sun, M. Weber, E. Zackrisson, L. Buchhave, L. B. Christensen, C. J. Hansen, P. Maslowski, M. Vestergaard

Proceedings Volume 9908, 990823 (2016) https://doi.org/10.1117/12.2231653

KEYWORDS: Physics, Stars, Spectrographs, Exoplanets, Planets, Galactic astronomy, Spectral resolution, Astronomy, Atmospheric sensing, Polarimetry

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Proceedings Article | 9 August 2016 Paper

ESPRESSO front end guiding algorithms: from design phase to implementation and validation toward the commissioning

M. Landoni, M. Riva, M. Aliverti, M. Genoni, M. Moschetti, L. Oggioni, G. Pariani, P. Di Marcantonio, G. Calderone, R. Cirami, F. Pepe, A. Cabral, S. Cristiani, D. Mégevand

Proceedings Volume 9913, 99133Q (2016) https://doi.org/10.1117/12.2231579

KEYWORDS: Telescopes, Device simulation, Computer simulations, Spectrographs, Charge-coupled devices, Exoplanets, Large telescopes, Photons, Sensors, Mirrors

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Proceedings Article | 22 July 2016 Paper

Alignment of the ESPRESSO Coudé train on the ESO VLT

Gerardo Avila, Alexandre Cabral, Joao Pinto Coelho, Bernard Delabre, Antonio Oliveira, Catarina Silva, Denis Megevand, M. Aliverti, G. Pariani, Manuel Abreu, Marco Riva, Pedro Santos

Proceedings Volume 9912, 99124L (2016) https://doi.org/10.1117/12.2231597

KEYWORDS: Optical alignment, Telescopes, Spectrographs, Tolerancing, Prisms, Beam splitters, Cameras, Image quality, Mirrors, Laser video displays

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Proceedings Article | 22 August 2014 Paper

Study of the stabilization of a semiconductor mode-lock laser using hybrid mode-lock and optical feedback

D. Castro Alves, Manuel Abreu, Alexandre Cabral, J. Rebordão

Proceedings Volume 9286, 92863M (2014) https://doi.org/10.1117/12.2063649

KEYWORDS: Semiconductor lasers, Laser stabilization, Oscillators, Mode locking, Distance measurement, Hybrid optics, Single mode fibers, Semiconductors, Dispersion, Pulsed laser operation

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Proceedings Article | 6 August 2014 Paper

HIRES: the high resolution spectrograph for the E-ELT

M. Riva, I. Boisse, X. Bonfils, D. Buscher, M. Monteiro, A. Cabral, P. Dimarcantonio, I. Di Varano, D. Henry, T. Morris, G. Murray, Ernesto Oliva, I. Parry, F. Pepe, A. Quirrenbach, J. Rasilla, P. Rees, E. Stempels, L. Valenziano, F. Wildi, M. Wells, L. Origlia, C. Allende Prieto, A. Chiavassa, S. Cristiani, P. Figueira, B. Gustafsson, A. Hatzes, M. Haehnelt, K. Heng, G. Israelian, O. Kochukhov, C. Lovis, C. J. A. P. Martins, P. Noterdaeme, P. Petitjean, T. Puzia, Didier Queloz, A. Reiners, M. Zoccali, A. Basden, A. Marconi, F. Zerbi, F. Bouchy, J. Fynbo, R. Maiolino, N. Piskunov, R. Rebolo Lopez, N. Santos, K. Strassmeier, S. Udry, L. Vanzi

Proceedings Volume 9147, 914723 (2014) https://doi.org/10.1117/12.2055329

KEYWORDS: Spectrographs, Spectral resolution, Stars, Telescopes, Spectroscopy, Calibration, Collimators, Cameras, Galactic astronomy, Sensors

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