Dr. Gaelen Marsden Profile

Dr. Gaelen Marsden

at Univ of British Columbia

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Publications (5)

Proceedings Article | 19 August 2014 Paper

SWCam: the short wavelength camera for the CCAT Observatory

Gordon Stacey, Stephen Parshley, Thomas Nikola, German Cortes-Medellin, Justin Schoenwald, Ganesh Rajagopalan, Michael Niemack, Tim Jenness, Patricio Gallardo, Brian Koopman, Charles Dowell, Peter Day, Matthew Hollister, Attila Kovacs, Henry LeDuc, Christopher McKenney, Ryan Monroe, Hiroshige Yoshida, Jonas Zmuidzinas, Loren Swenson, Simon Radford, Hien Trong Nguyen, Anthony Mroczkowski, Jason Glenn, Jordan Wheeler, Philip Maloney, Spencer Brugger, Joseph Adams, Frank Bertoldi, Reinhold Schaaf, Mark Halpern, Douglas Scott, Galen Marsden, Jack Sayers, Scott Chapman, Joaquin Vieira

Proceedings Volume 9153, 91530L (2014) https://doi.org/10.1117/12.2057101

KEYWORDS: Cameras, Galactic astronomy, Sensors, Silicon, Stars, Thin film coatings, Telescopes, Deep reactive ion etching, Surface conduction electron emitter displays, Observatories

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We describe the Short Wavelength Camera (SWCam) for the CCAT observatory including the primary science drivers, the coupling of the science drivers to the instrument requirements, the resulting implementation of the design, and its performance expectations at first light. CCAT is a 25 m submillimeter telescope planned to operate at 5600 meters, near the summit of Cerro Chajnantor in the Atacama Desert in northern Chile. CCAT is designed to give a total wave front error of 12.5 μm rms, so that combined with its high and exceptionally dry site, the facility will provide unsurpassed point source sensitivity deep into the short submillimeter bands to wavelengths as short as the 200 μm telluric window. The SWCam system consists of 7 sub-cameras that address 4 different telluric windows: 4 subcameras at 350 μm, 1 at 450 μm, 1 at 850 μm, and 1 at 2 mm wavelength. Each sub-camera has a 6’ diameter field of view, so that the total instantaneous field of view for SWCam is equivalent to a 16’ diameter circle. Each focal plane is populated with near unit filling factor arrays of Lumped Element Kinetic Inductance Detectors (LEKIDs) with pixels scaled to subtend an solid angle of (λ/D)2 on the sky. The total pixel count is 57,160. We expect background limited performance at each wavelength, and to be able to map < 35(°)2 of sky to 5 σ on the confusion noise at each wavelength per year with this first light instrument. Our primary science goal is to resolve the Cosmic Far-IR Background (CIRB) in our four colors so that we may explore the star and galaxy formation history of the Universe extending to within 500 million years of the Big Bang. CCAT's large and high-accuracy aperture, its fast slewing speed, use of instruments with large format arrays, and being located at a superb site enables mapping speeds of up to three orders of magnitude larger than contemporary or near future facilities and makes it uniquely sensitive, especially in the short submm bands.

Proceedings Article | 18 July 2014 Paper

An overview of the planned CCAT software system

Tim Jenness, Martin Shepherd, Reinhold Schaaf, Jack Sayers, Volker Ossenkopf, Thomas Nikola, Gaelen Marsden, Ronan Higgins, Kevin Edwards, Adam Brazier

Proceedings Volume 9152, 91522W (2014) https://doi.org/10.1117/12.2056516

KEYWORDS: Data modeling, Data storage, Sensors, Control systems, Telescopes, Observatories, On-screen displays, Software development, Databases, Astronomy

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Proceedings Article | 15 July 2010 Paper

The balloon-borne large-aperture submillimeter telescope for polarimetry: BLAST-Pol

Laura Fissel, Peter A. Ade, Francesco Angilè, Steven Benton, Edward Chapin, Mark Devlin, Natalie Gandilo, Joshua Gundersen, Peter Hargrave, David Hughes, Jeffrey Klein, Andrei Korotkov, Galen Marsden, Tristan Matthews, Lorenzo Moncelsi, Tony Mroczkowski, C. Barth Netterfield, Giles Novak, Luca Olmi, Enzo Pascale, Giorgio Savini, Douglas Scott, Jamil Shariff, Juan Diego Soler, Nicholas Thomas, Matthew D. Truch, Carole Tucker, Gregory Tucker, Derek Ward-Thompson, Donald Wiebe

Proceedings Volume 7741, 77410E (2010) https://doi.org/10.1117/12.857601

KEYWORDS: Clouds, Polarization, Telescopes, Polarimetry, Magnetism, Sensors, Stars, Mirrors, Physics, Space telescopes

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Proceedings Article | 18 July 2008 Paper

The Balloon-borne Large-Aperture Submillimeter Telescope for polarization: BLAST-pol

G. Marsden, P. A. R. Ade, S. Benton, J. Bock, E. Chapin, J. Chung, M. Devlin, S. Dicker, L. Fissel, M. Griffin, J. Gundersen, M. Halpern, P. Hargrave, D. Hughes, J. Klein, A. Korotkov, C. MacTavish, P. Martin, T. Martin, T. Matthews, P. Mauskopf, L. Moncelsi, C. Netterfield, G. Novak, E. Pascale, L. Olmi, G. Patanchon, M. Rex, G. Savini, D. Scott, C. Semisch, N. Thomas, M. D. P. Truch, C. Tucker, G. Tucker, M. Viero, D. Ward-Thompson, D. Wiebe

Proceedings Volume 7020, 702002 (2008) https://doi.org/10.1117/12.788413

KEYWORDS: Polarization, Clouds, Sensors, Stars, Mirrors, Telescopes, Polarimetry, Space telescopes, Magnetism, Physics

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Proceedings Article | 8 October 2004 Paper

The Balloon-borne Large Aperture Submillimeter Telescope (BLAST)

Mark Devlin, Peter Ade, Itziar Aretxaga, James Bock, Jaspaul Chung, Edward Chapin, Simon Dicker, Matt Griffin, Joshua Gundersen, Mark Halpern, Peter Hargrave, David Hughes, Jeffrey Klein, Gaelen Marsden, Peter Martin, Philip Mauskopf, Barth Netterfield, Luca Olmi, Enzo Pascale, Marie Rex, Douglas Scott, Christopher Semisch, Matthew Truch, Carole Tucker, Gregory Tucker, Anthony Turner, Donald Weibe

Proceedings Volume 5498, (2004) https://doi.org/10.1117/12.555258

KEYWORDS: Galactic astronomy, Sensors, Mirrors, Telescopes, Stars, Bolometers, Astronomy, Space telescopes, Physics, Cameras

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