Prof. Philip S. Muirhead Profile

Prof. Philip S. Muirhead

Assistant Professor at Boston Univ

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Author

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Personal Website | Company Website

Publications (18)

Proceedings Article | 6 July 2018 Paper

Enhanced exoplanet biosignature detection from an interferometer addition to low resolution spectrographs

David Erskine, Philip Muirhead, Andrew Vanderburg, Andrew Szentgyorgyi

Proceedings Volume 10702, 107024G (2018) https://doi.org/10.1117/12.2303586

KEYWORDS: Interferometers, Spectrographs, Exoplanets, Moire patterns, Molecules, Doppler effect, Image resolution, Fourier transforms, Spectral resolution

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SPIE Journal Paper | 2 December 2016 Open Access

High-resolution broadband spectroscopy using externally dispersed interferometry at the Hale telescope: part 2, photon noise theory

David Erskine, Jerry Edelstein, Edward Wishnow, Martin Sirk, Philip Muirhead, Matthew Muterspaugh, James Lloyd

JATIS, Vol. 2, Issue 04, 045001, (December 2016) https://doi.org/10.1117/12.10.1117/1.JATIS.2.4.045001

KEYWORDS: Signal to noise ratio, Spectrographs, Interference (communication), Interferometry, Point spread functions, Interferometers, Spectroscopes, Sensors, Image resolution, Fourier transforms

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High-resolution broadband spectroscopy at near-infrared (NIR) wavelengths (950 to 2450 nm) has been performed using externally dispersed interferometry (EDI) at the Hale telescope at Mt. Palomar, with the TEDI interferometer mounted within the central hole of the 200-in. primary mirror in series with the comounted TripleSpec NIR echelle spectrograph. These are the first multidelay EDI demonstrations on starlight. We demonstrated very high (10×) resolution boost and dramatic (20× or more) robustness to point spread function wavelength drifts in the native spectrograph. Data analysis, results, and instrument noise are described in a companion paper (part 1). This part 2 describes theoretical photon limited and readout noise limited behaviors, using simulated spectra and instrument model with noise added at the detector. We show that a single interferometer delay can be used to reduce the high frequency noise at the original resolution (1× boost case), and that except for delays much smaller than the native response peak half width, the fringing and nonfringing noises act uncorrelated and add in quadrature. This is due to the frequency shifting of the noise due to the heterodyning effect. We find a sum rule for the noise variance for multiple delays. The multiple delay EDI using a Gaussian distribution of exposure times has noise-to-signal ratio for photon-limited noise similar to a classical spectrograph with reduced slitwidth and reduced flux, proportional to the square root of resolution boost achieved, but without the focal spot limitation and pixel spacing Nyquist limitations. At low boost (∼1×) EDI has ∼1.4× smaller noise than conventional, and at >10× boost, EDI has ∼1.4× larger noise than conventional. Readout noise is minimized by the use of three or four steps instead of 10 of TEDI. Net noise grows as step phases change from symmetrical arrangement with wavenumber across the band. For three (or four) steps, we calculate a multiplicative bandwidth of 1.8:1 (2.3:1), sufficient to handle the visible band (400 to 700 nm, 1.8:1) and most of TripleSpec (2.6:1).

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Proceedings Article | 9 August 2016 Paper

Dramatic robustness of a multiple delay dispersed interferometer to spectrograph errors: how mixing delays reduces or cancels wavelength drift

David Erskine, E. Linder, E. Wishnow, J. Edelstein, M. Sirk, P. Muirhead, J. Lloyd, A. Kim

Proceedings Volume 9908, 99085Y (2016) https://doi.org/10.1117/12.2230182

KEYWORDS: Spectrographs, Interferometers, Doppler effect, Point spread functions, Moire patterns, Fabry–Perot interferometers, Lamps, Sensors, Wavelets, Data modeling

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Proceedings Article | 9 August 2016 Paper

NEWS: the near-infrared Echelle for wideband spectroscopy

Mark Veyette, Philip Muirhead, Zachary Hall, Brian Taylor, Jimmy Ye

Proceedings Volume 9908, 99086M (2016) https://doi.org/10.1117/12.2232632

KEYWORDS: Spectroscopy, Mirrors, Space telescopes, Telescopes, Sensors, Stars, Computer aided design, Near infrared, Planets, Cameras

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SPIE Journal Paper | 27 May 2016 Open Access

High-resolution broadband spectroscopy using externally dispersed interferometry at the Hale telescope: Part 1, data analysis and results

David Erskine, Jerry Edelstein, Edward Wishnow, Martin Sirk, Philip Muirhead, Matthew Muterspaugh, James Lloyd, Yuzo Ishikawa, Eliza McDonald, William Shourt, Andrew Vanderburg

JATIS, Vol. 2, Issue 02, 025004, (May 2016) https://doi.org/10.1117/12.10.1117/1.JATIS.2.2.025004

KEYWORDS: Spectrographs, Point spread functions, Stars, Fabry–Perot interferometers, Interferometry, Spectroscopes, Interferometers, Lamps, Modulation transfer functions, Wavelets

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SPIE Journal Paper | 21 April 2015 Open Access

Miniature Exoplanet Radial Velocity Array I: design, commissioning, and early photometric results

Jonathan Swift, Michael Bottom, John Johnson, Jason Wright, Nate McCrady, Rob Wittenmeyer, Peter Plavchan, Reed Riddle, Philip Muirhead, Erich Herzig, Justin Myles, Cullen Blake, Jason Eastman, Thomas Beatty, Stuart Barnes, Steven Gibson, Brian Lin, Ming Zhao, Paul Gardner, Emilio Falco, Stephen Criswell, Chantanelle Nava, Connor Robinson, David Sliski, Richard Hedrick, Kevin Ivarsen, Annie Hjelstrom, Jon de Vera, Andrew Szentgyorgyi

JATIS, Vol. 1, Issue 02, 027002, (April 2015) https://doi.org/10.1117/12.10.1117/1.JATIS.1.2.027002

KEYWORDS: Telescopes, Planets, Stars, Cameras, Exoplanets, Spectrographs, Optical fibers, Photometry, Space telescopes, Astronomy

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Proceedings Article | 28 July 2014 Paper

Design, motivation, and on-sky tests of an efficient fiber coupling unit for 1-meter class telescopes

Michael Bottom, Philip Muirhead, Jonathan Swift, Ming Zhao, Paul Gardner, Peter Plavchan, Reed Riddle, Erich Herzig, John Johnson, Jason Wright, Nate McCrady, Robert Wittenmeyer

Proceedings Volume 9147, 91472E (2014) https://doi.org/10.1117/12.2055605

KEYWORDS: Telescopes, Cameras, Optical instrument design, Spectrographs, Pellicles, Stars, Fiber couplers, Exoplanets, Space telescopes, Observatories

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Proceedings Article | 28 July 2014 Paper

HiJaK: the high-resolution J, H and K spectrometer

Philip Muirhead, Zachary Hall, Mark Veyette

Proceedings Volume 9147, 91477T (2014) https://doi.org/10.1117/12.2055449

KEYWORDS: Spectroscopy, Telescopes, Stars, Infrared spectroscopy, Sensors, Exoplanets, Computer aided design, Spectral resolution, Cameras, Optical instrument design

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Proceedings Article | 15 September 2011 Paper

Ten-fold spectral resolution boosting using TEDI at the Mt. Palomar NIR Triplespec spectrograph

David Erskine, J. Edelstein, P. Muirhead, M. Muterspaugh, K. Covey, D. Mondo, A. Vanderburg, P. Andelson, D. Kimber, M. Sirk, J. Lloyd

Proceedings Volume 8146, 81460M (2011) https://doi.org/10.1117/12.892664

KEYWORDS: Spectrographs, Interferometers, Modulation transfer functions, Intelligence systems, Fourier transforms, Spectral resolution, Data modeling, Interferometry, Doppler effect, Spectroscopy

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Proceedings Article | 21 July 2010 Paper

Infrared radial velocimetry with TEDI: performance development

Jerry Edelstein, Philip Muirhead, Jason Wright, Kevin Covey, David Erskine, Matthew Muterspaugh, James Lloyd, Samuel Halverson, Mario Marckwordt, Daniel Mondo

Proceedings Volume 7735, 773583 (2010) https://doi.org/10.1117/12.858312

KEYWORDS: Interferometers, Telescopes, Optical fibers, Spectrographs, Dispersion, Stars, Mirrors, Infrared radiation, Target acquisition, Interferometry

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Proceedings Article | 21 July 2010 Paper

Precise infrared radial velocimetry with the Triplespec Exoplanet Discovery Instrument: current performance and results

Philip Muirhead, Jerry Edelstein, Jason Wright, David Erskine, Matthew Muterspaugh, Kevin Covey, Mario Marckwordt, Samuel Halverson, Daniel Mondo, James Lloyd

Proceedings Volume 7735, 77357X (2010) https://doi.org/10.1117/12.857196

KEYWORDS: Interferometers, Stars, Doppler effect, Exoplanets, Spectrographs, Telescopes, Modulation, Krypton, Velocity measurements, Device simulation

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Proceedings Article | 15 July 2008 Paper

Imaging the surface of Altair and a MIRC update

John Monnier, M. Zhao, E. Pedretti, N. Thureau, M. Ireland, P. Muirhead, J.-P. Berger, R. Millan-Gabet, G. Van Belle, T. ten Brummelaar, H. McAlister, S. Ridgway, N. Turner, L. Sturmann, J. Sturmann, D. Berger, A. Tannirkulam, J. Blum

Proceedings Volume 7013, 701302 (2008) https://doi.org/10.1117/12.789754

KEYWORDS: Calibration, Telescopes, Stars, Visibility, Binary data, Infrared radiation, Infrared imaging, Single mode fibers, Interferometers, Spectrographs

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Proceedings Article | 9 July 2008 Paper

The performance of TripleSpec at Palomar

Terry Herter, Charles Henderson, John Wilson, Keith Matthews, Gustavo Rahmer, Marco Bonati, Philip Muirhead, Joseph Adams, James Lloyd, Michael Skrutskie, Dae-Sik Moon, Stephen Parshley, Matthew Nelson, Frantz Martinache, George Gull

Proceedings Volume 7014, 70140X (2008) https://doi.org/10.1117/12.789660

KEYWORDS: Telescopes, Spectrographs, Mirrors, Prisms, Space telescopes, Stars, Sensors, Cameras, Spectral resolution, Observatories

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Proceedings Article | 9 July 2008 Paper

Dispersed interferometry for infrared exoplanet velocimetry

Jerry Edelstein, Matthew Muterspaugh, David Erskine, Mario Marckwordt, W. Michael Feuerstein, Tony Mercer, Agnieszka Czeszumska, Jaclyn Schwer, Sam Halverson, James Lloyd, Philip Muirhead, Jason Wright, Terry Herter

Proceedings Volume 7014, 70147F (2008) https://doi.org/10.1117/12.790315

KEYWORDS: Stars, Planets, Spectrographs, Interferometry, Exoplanets, Doppler effect, Velocity measurements, Velocimetry, Infrared radiation, Interferometers

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Proceedings Article | 4 October 2007 Paper

TEDI: the TripleSpec Exoplanet Discovery Instrument

Jerry Edelstein, Matthew Ward Muterspaugh, David Erskine, W. Michael Feuerstein, Mario Marckwordt, Ed Wishnow, James Lloyd, Terry Herter, Phillip Muirhead, George Gull, Charles Henderson, Stephen Parshley

Proceedings Volume 6693, 66930W (2007) https://doi.org/10.1117/12.735474

KEYWORDS: Spectrographs, Stars, Interferometers, Absorption, Telescopes, Doppler effect, Exoplanets, Planets, Calibration, Mirrors

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Proceedings Article | 30 June 2006 Paper

Noise studies of externally dispersed interferometry for Doppler velocimetry

David Erskine, Jerry Edelstein, James Lloyd, Philip Muirhead

Proceedings Volume 6269, 62692P (2006) https://doi.org/10.1117/12.670683

KEYWORDS: Doppler effect, Spectrographs, Interferometers, Signal to noise ratio, Velocimetry, Signal detection, Fourier transforms, Solids, Sensors, Heterodyning

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Proceedings Article | 28 June 2006 Paper

Michigan Infrared Combiner (MIRC): commissioning results at the CHARA Array

John Monnier, Ettore Pedretti, Nathalie Thureau, Jean-Philippe Berger, Rafael Millan-Gabet, Theo ten Brummelaar, Harold McAlister, Judit Sturmann, Lazlo Sturmann, Phil Muirhead, Ajay Tannirkulam, Scott Webster, Ming Zhao

Proceedings Volume 6268, 62681P (2006) https://doi.org/10.1117/12.671982

KEYWORDS: Optical fibers, Infrared radiation, Telescopes, Infrared telescopes, Infrared imaging, Cameras, Sensors, Interferometers, K band, Spectrographs

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Proceedings Article | 28 June 2006 Paper

CHARA Michigan phase-tracker (CHAMP): design and fabrication

David Berger, John Monnier, Rafael Millan-Gabet, Theo ten Brummelaar, Philip Muirhead, Ettore Pedretti, Nathalie Thureau

Proceedings Volume 6268, 62683K (2006) https://doi.org/10.1117/12.672168

KEYWORDS: Modulation, Beam splitters, Sensors, Mirrors, Interferometers, Optical amplifiers, Optical fabrication, Fourier transforms, Staring arrays, Computing systems

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Showing 5 of 18 publications

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