Dr. Marc G. Lacasse Profile

Dr. Marc G. Lacasse

at Fred Lawrence Whipple Observatory/MMT

SPIE Involvement:

Author

Publications (21)

Proceedings Article | 28 July 2008 Paper

Paper

Last technology and results from the IOTA interferometer

Ettore Pedretti, Wesley Traub, John Monnier, Peter Schuller, Sam Ragland, Jean–Philippe Berger, Rafael Millan-Gabet, Gary Wallace, Michael Burke, Marc Lacasse, Nathalie Thureau, Nathaniel Carleton

Proceedings Volume 7013, 70132V (2008) https://doi.org/10.1117/12.789751

KEYWORDS: Stars, Spectrographs, Interferometers, Infrared radiation, Prisms, Visibility, Telescopes, Data modeling, Infrared telescopes, Interferometry

Read Abstract +

Proceedings Article | 27 June 2006 Paper

Paper

IOTA: recent science and technology

F. Peter Schloerb, J.-P. Berger, N. Carleton, P. Hagenauer, P. Kern, P. Labeye, M. Lacasse, F. Malbet, R. Millan-Gabet, J. Monnier, M. Pearlman, E. Pedretti, K. Rousselet-Perraut, S. Ragland, P. Schuller, W. Traub, G. Wallace

Proceedings Volume 6268, 62680I (2006) https://doi.org/10.1117/12.672597

KEYWORDS: Stars, Interferometers, Phase measurement, Telescopes, Infrared telescopes, Visibility, Infrared radiation, Remote sensing, Spectroscopy, Observatories

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Paper

Fringe tracking at the IOTA interferometer

Ettore Pedretti, Nathalie Thureau, Edward Wilson, Wesley Traub, John Monnier, Sam Ragland, Nathaniel Carleton, Rafael Millan-Gabet, F. Peter Schloerb, Michael Brewer, Jean-Philippe Berger, Marc Lacasse

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551625

KEYWORDS: Detection and tracking algorithms, Interferometers, Algorithm development, Telescopes, Signal to noise ratio, Phase measurement, Infrared radiation, Stars, Optical tracking, Infrared telescopes

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Paper

Characterizing closure-phase measurements at IOTA

Sam Ragland, Wesley Traub, Jean-Philippe Berger, Rafael Millan-Gabet, John Monnier, Ettore Pedretti, F. Schloerb, Nathaniel Carleton, Pierre Haguenauer, Pierre Kern, Pierre Labeye, Marc Lacasse, Fabien Malbet, Karine Rousselet-Perraut

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.552447

KEYWORDS: Stars, Interferometers, Telescopes, Integrated optics, Polarization, Visibility, Phase measurement, Infrared telescopes, Calibration, Absorption filters

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Paper

IOTA: recent technology and science

Wesley Traub, Jean-Philippe Berger, Michael Brewer, Nathaniel Carleton, Pierre Kern, Stefan Kraus, Marc Lacasse, William McGonagle, Rafael Millan-Gabet, John Monnier, Ettore Pedretti, Sam Ragland, Robert Reich, F. Peter Schloerb, Peter Schuller, Kamal Souccar, Gary Wallace

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.550916

KEYWORDS: Stars, Cameras, Telescopes, Control systems, Integrated optics, Infrared radiation, Phase measurement, Sensors, Prisms, Interferometers

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Paper

LLiST: a new-star tracker camera for tip-tilt correction at IOTA

Peter Schuller, Marc Lacasse, Donald Lydon, William McGonagle, Ettore Pedretti, Robert Reich, F. Peter Schloerb, Wesley Traub

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.552105

KEYWORDS: Cameras, Stars, Charge-coupled devices, Imaging systems, CCD cameras, Control systems, Infrared telescopes, Telescopes, Infrared radiation, Quantum efficiency

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

Reconfigurable electronics at the IOTA interferometer

Ettore Pedretti, Rafael Millan-Gabet, John Monnier, S. Morel, Wesley Traub, Nathaniel Carleton, Jean-Philippe Berger, P. Schloerb, Michael Brewer, Sam Ragland, Marc Lacasse

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459339

KEYWORDS: Clocks, Cameras, Sensors, Stars, Electronics, Data conversion, Bridges, Control systems, Telescopes, Logic

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

Recent science results from the two-telescope IOTA

Rafael Millan-Gabet, Ettore Pedretti, John Monnier, Wesley Traub, F. Peter Schloerb, Nathaniel Carleton, Sam Ragland, Marc Lacasse, William Danchi, Peter Tuthill, Guy Perrin, Vincent Coude du Foresto

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459687

KEYWORDS: Visibility, Stars, Data modeling, Calibration, Content addressable memory, Infrared radiation, Atmospheric modeling, X-rays, Carbon, Interferometers

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

JHK-band spectro-interferometry of T Cep with the IOTA interferometer

Gerd Weigelt, Udo Beckmann, Jean-Philippe Berger, Thomas Bloecker, Michael Brewer, Karl-Heinz Hofmann, Marc Lacasse, Victor Malanushenko, Rafael Millan-Gabet, John Monnier, Keiichi Ohnaka, Ettore Pedretti, Dieter Schertl, F. Peter Schloerb, Michael Scholz, Wesley Traub, Boris Yudin

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458659

KEYWORDS: Visibility, K band, Stars, Interferometers, Radium, Linear filtering, Astronomy, Prisms, Temperature metrology, Spatial frequencies

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

Aperture synthesis using multiple facilities: Keck aperture masking and the IOTA interferometer

John Monnier, Rafael Millan-Gabet, Peter Tuthill, Wesley Traub, Nathaniel Carleton, Vincent Coude du Foresto, William Danchi, Marc Lacasse, Sebastien Morel, Guy Perrin, Irene Porro

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459694

KEYWORDS: Visibility, Interferometers, Calibration, Image restoration, Synthetic apertures, Microelectromechanical systems, Stars, Interferometry, Astronomical imaging, Astronomy

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

Near-infrared IOTA interferometry of the symbiotic star CH Cyg

Karl-Heinz Hofmann, Udo Beckmann, Jean-Philippe Berger, Thomas Bloecker, Michael Brewer, Marc Lacasse, Victor Malanushenko, Rafael Millan-Gabet, John Monnier, Keiichi Ohnaka, Ettore Pedretti, Dieter Schertl, F. Peter Schloerb, Michael Scholz, Wesley Traub, Gerd Weigelt, Boris Yudin

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458904

KEYWORDS: Visibility, Stars, K band, Interferometry, Electromagnetic coupling, Linear filtering, Astronomy, Interferometers, Radium, Physics

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

Interferometric observations of evolved stars in the L-band

Gilles Chagnon, Bertrand Mennesson, Guy Perrin, Vincent Coude du Foresto, Marc Lacasse

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458060

KEYWORDS: Stars, L band, Interferometry, Infrared radiation, Telescopes, Calibration, Interferometers, Thermography, Infrared telescopes, Data acquisition

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

New beam-combination techniques at IOTA

Wesley Traub, Angela Ahearn, Nathaniel Carleton, Jean-Philippe Berger, Michael Brewer, Karl-Heinz Hofmann, Pierre Kern, Marc Lacasse, Fabien Malbet, Rafael Millan-Gabet, John Monnier, Keiichi Ohnaka, Ettore Pedretti, Sam Ragland, F. Peter Schloerb, Kamal Souccar, Gerd Weigelt

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459718

KEYWORDS: Telescopes, Stars, Sensors, Interferometers, Integrated optics, Mirrors, Charge-coupled devices, Visibility, Computing systems, Control systems

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

IOTA observation of the circumstellar envelope of R CrB

Keiichi Ohnaka, Udo Beckmann, Jean-Philippe Berger, Michael Brewer, Karl-Heinz Hofmann, Marc Lacasse, Victor Malanushenko, Rafael Millan-Gabet, John Monnier, Ettore Pedretti, Dieter Schertl, F. Peter Schloerb, Victor Shenavrin, Wesley Traub, Gerd Weigelt, Boris Yudin

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458931

KEYWORDS: Visibility, Stars, K band, Interferometry, Surface conduction electron emitter displays, Clouds, Infrared telescopes, Astronomy, Infrared radiation, Optical telescopes

Read Abstract +

Proceedings Article | 5 July 2000 Paper

Paper

Thermal infrared stellar interferometry using single-mode guided optics: first scientific results from the IOTA

Bertrand Mennesson, Guy Perrin, Vincent Coude du Foresto, Gilles Chagnon, Cyril Ruilier, Sebastien Morel, Stephen Ridgway, Bruno Lopez, Patrick de Laverny, Wesley Traub, Nathaniel Carleton, Marc Lacasse

Proceedings Volume 4006, (2000) https://doi.org/10.1117/12.390243

KEYWORDS: Interferometry, Thermography, Infrared radiation, Stars, Infrared telescopes, L band, Data modeling, Visibility, K band, Atmospheric modeling

Read Abstract +

Proceedings Article | 5 July 2000 Paper

Paper

Third telescope project at the IOTA interferometer

Wesley Traub, Nathaniel Carleton, Jesse Bregman, Michael Brewer, Marc Lacasse, P. Maymounkov, Rafael Millan-Gabet, John Monnier, Sebastien Morel, Costas Papaliolios, Michael Pearlman, Irene Porro, F. Peter Schloerb, Kamal Souccar

Proceedings Volume 4006, (2000) https://doi.org/10.1117/12.390273

KEYWORDS: Mirrors, Telescopes, Control systems, Interferometers, Cameras, Stars, Infrared radiation, Computing systems, Wavefronts, Retroreflectors

Read Abstract +

Proceedings Article | 5 July 2000 Paper

Paper

Cepheid observations by long-baseline interferometry with FLUOR/IOTA

Pierre Kervella, Vincent Coude du Foresto, Wesley Traub, Marc Lacasse

Proceedings Volume 4006, (2000) https://doi.org/10.1117/12.390252

KEYWORDS: Stars, Visibility, Interferometry, Calibration, Interferometers, Infrared telescopes, Infrared radiation, Telescopes, Phase measurement, Observatories

Read Abstract +

Proceedings Article | 5 July 2000 Paper

Paper

Observations of MIRA stars with the IOTA/FLUOR interferometer and comparison with MIRA star models

Karl-Heinz Hofmann, Udo Beckmann, Thomas Bloecker, Vincent Coude du Foresto, Marc Lacasse, Rafael Millan-Gabet, Sebastien Morel, B. Pras, Cyril Ruilier, Dieter Schertl, Michael Scholz, Victor Shenavrin, Wesley Traub, Gerd Weigelt, Markus Wittkowski, Boris Yudin

Proceedings Volume 4006, (2000) https://doi.org/10.1117/12.390270

KEYWORDS: Stars, K band, Visibility, Temperature metrology, Interferometers, Spatial frequencies, Fiber optics, Atmospheric optics, Astronomy, Interferometry

Read Abstract +

Proceedings Article | 24 July 1998 Paper

Paper

FLUOR fibered instrument at the IOTA interferometer

Vincent Coude du Foresto, Guy Perrin, Cyril Ruilier, Bertrand Mennesson, Wesley Traub, Marc Lacasse

Proceedings Volume 3350, (1998) https://doi.org/10.1117/12.317153

KEYWORDS: Visibility, Interferometers, Infrared radiation, Telescopes, Interferometry, Stars, Polarization, Waveguides, Calibration, Glasses

Read Abstract +

Proceedings Article | 9 June 1994 Paper

Paper

Current status of the IOTA interferometer

Nathaniel Carleton, Wesley Traub, Marc Lacasse, Peter Nisenson, Michael Pearlman, Robert Reasenberg, Xinqi Xu, Charles Coldwell, Alexander Panasyuk, James Benson, Costas Papaliolios, Read Predmore, F. Peter Schloerb, H. Dyck, David Gibson

Proceedings Volume 2200, (1994) https://doi.org/10.1117/12.177236

KEYWORDS: Telescopes, Mirrors, Sensors, Beam splitters, Infrared radiation, Stars, Visibility, Interferometry, Infrared telescopes, Visible radiation

Read Abstract +

The first two telescopes of the Infrared-Optical Telescope Array (IOTA) project are now in place and yielding data at the Smithsonian Institution's F. L. Whipple Observatory on Mt. Hopkins, near Tucson, Arizona. The IOTA collectors are 45 cm in diameter, and may be moved to various stations in an L-shaped configuration with a maximum baseline of 38 m. A third collector will be added as soon as funding permits. Each light-collector assembly consists of a siderostat feeding a stationary afocal Cassegrain telescope that produces a 10-X reduced parallel beam, which is in turn directed vertically downward by a piezo-driven active mirror that stabilizes the ultimate image position. The reduced beams enter an evacuated envelope and proceed to the corner of the array, where they are turned back along one arm for path compensation. The delay line, in one beam, consists of two parts: one dihedral reflector positioned in a slew-and-clamp mode to give the major part of the desired delay; and a second dihedral mounted on an air-bearing carriage to provide the variable delay that is needed. After delay, the beams exit from the vacuum and are directed by dichroic mirrors into the infrared beam-combination and detection system. The visible light passes on to another area, to the image-tracker detectors and the visible-light combination and detection system. The beams are combined in pupil-plane mode on beam splitters. The combined IR beams are conveyed to two cooled single-element InSb detectors. The combined visible-light beams are focussed by lenslet arrays onto multimode optical fibers that lead to the slit of a specially-designed prism spectrometer. For the visible mode, the delay line is run at several wavelengths on one side of the zero- path point, so that several cycles of interference occur across the spectrum. First results were obtained with the IR system, giving visibilities for several K and M stars, using 2.2 micrometers radiation on a N-S baseline of 21.2 m. From these measurements we obtained preliminary estimates of effective stellar diameters in the K band.

Proceedings Article | 1 August 1990 Paper

Paper

Spectral dispersion and fringe detection in IOTA

Wesley Traub, Marc Lacasse, Nathaniel Carleton

Proceedings Volume 1237, (1990) https://doi.org/10.1117/12.19289

KEYWORDS: Dispersion, Prisms, Detection and tracking algorithms, Interferometry, Interferometers, Cameras, Spectrographs, Polishing, Visibility, Photodetectors

Read Abstract +

Showing 5 of 21 publications

SIGN IN TO:

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Advertisement

Advertisement