Dr. Deane M. Peterson Profile

Dr. Deane M. Peterson

Associate Professor at Stony Brook Univ

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Author

Publications (9)

Proceedings Article | 29 June 2006 Paper

Early type stars as calibrators for ground-based interferometry

Jinmi Yoon, Deane Peterson, Thomas Armstrong, James Clark III, Charmaine Gilbreath, Thomas Pauls, Henrique Schmitt

Proceedings Volume 6268, 626848 (2006) https://doi.org/10.1117/12.670309

KEYWORDS: Stars, Visibility, Calibration, Interferometry, Error analysis, Observatories, Michelson interferometers, Prototyping, Interferometers, Atmospheric modeling

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Proceedings Article | 28 June 2006 Paper

Thermal and deadtime effects in APD pulse detectors: a unified model

D. Peterson, D. Mozurkewich, C. Hummel

Proceedings Volume 6268, 62681O (2006) https://doi.org/10.1117/12.672094

KEYWORDS: Sensors, Avalanche photodetectors, Light emitting diodes, Thermal modeling, Diodes, Thermal effects, Quantum efficiency, Data modeling, Signal detection, Electrons

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Proceedings Article | 28 June 2006 Paper

Using differential phases in optical interferometry

Henrique Schmitt, Thomas Pauls, Christopher Tycner, J. Thomas Armstrong, James Benson, James Clark, Robert Hindsley, Donald Hutter, Deane Peterson, Anders Jorgensen, David Mozurkewich, G. Charmaine Gilbreath, Robert Zavala

Proceedings Volume 6268, 62683B (2006) https://doi.org/10.1117/12.672396

KEYWORDS: Stars, Calibration, Phase interferometry, Optical interferometry, Observatories, Beryllium, Interferometers, Analytical research, Prototyping, Phase measurement

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Proceedings Article | 27 June 2006 Paper

Coherent integrations, fringe modeling, and bootstrapping with the NPOI

Anders Jorgensen, Dave Mozurkewich, Henrique Schmitt, J. Thomas Armstrong, G. Charmaine Gilbreath, Robert Hindsley, Thomas Pauls, Deane Peterson

Proceedings Volume 6268, 62681H (2006) https://doi.org/10.1117/12.672829

KEYWORDS: Signal to noise ratio, Visibility, Atmospheric modeling, Calibration, Phase measurement, Solids, Stars, Instrument modeling, Data modeling, Interferometers

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Atmospheric turbulence is a major impediment to ground-based optical interferometry. It causes fringes to move on ms time-scales, forcing very short exposures. Because of the semi-random phase shifts, the traditional approach averages exposure power spectra to build signal-to-noise ratio (SNR). This incoherent average has two problems: (1) A bias of correlated noise is introduced which must be subtracted. The smaller the visibility/the fainter the target star, the more diffcult bias subtraction becomes. SNR builds only slowly in this case. Unfortunately, these most difficult small visibility baselines contain most of the image information. (2) Baseline phase information is discarded. These are serious challenges to imaging with ground based optical interferometers. But if we were able to determine fringe phase, we could shift and integrate all the short exposures. We would then eliminate the bias problem, improve the SNR, and we would have preserved most of the phase information. This coherent averaging becomes possible with multi-spectral measurements. The group delay presents one option for determining phase. A more accurate approach is to use a time-dependent model of the fringe. For the most interesting low-visibility baselines, the atmospheric phase information can be bootstrapped from phase determinations on high-visibility baselines using the closure relation. The NPOI, with 32 spectral channels and a bootstrapping configuration, is well-suited for these approaches. We will illustrate how the fringe modeling approach works, compare it to the group-delay approach, and show how these approaches can be used to derive bias-free visibility amplitude and phase information. Coherent integration provides the highest signal-to-noise (SNR) improvement precisely in the situations where SNR builds most slowly using incoherent averaging. Coherent integration also produces high-SNR phase measurements which are calibration-free and thus have high real uncertainties as well. In this paper we will show how to coherently integration on NPOI data, and how to use baseline visibilities and calibrate coherently integrated visibility amplitudes.

Proceedings Article | 20 October 2004 Paper

Resolving the effects of rotation in early type stars

Deane Peterson, Christian Hummel, Thomas Pauls, J. Armstrong, James Benson, G. Gilbreath, Robert Hindsley, Donald Hutter, David Mozurkewich

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.552020

KEYWORDS: Stars, Atmospheric modeling, Solids, Data modeling, Phase measurement, Calibration, Observatories, Analytical research, Interferometers, Physics

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Proceedings Article | 20 October 2004 Paper

Coherent integration of NPOI phase closure data on Altair

Christian Hummel, David Mozurkewich, James Benson, Deane Peterson

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.550806

KEYWORDS: Data modeling, Calibration, Visibility, Stars, Interferometers, Data integration, Signal to noise ratio, Spectrometers, Observatories, Phase measurement

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Proceedings Article | 21 February 2003 Paper

Simulating atmosphere phase screens for dilute arrays

Deane Peterson, David Mozurkewich

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459764

KEYWORDS: Wavefronts, Computer simulations, Matrices, Algorithm development, Atmospheric optics, Chemical elements, Interferometry, Interferometers, Stars, Analytical research

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Proceedings Article | 21 March 1997 Paper

Space Interferometry Mission: taking the measure of the universe

Ronald Allen, Deane Peterson, Michael Shao

Proceedings Volume 2871, (1997) https://doi.org/10.1117/12.269075

KEYWORDS: Stars, Interferometry, Galactic astronomy, Interferometers, Space telescopes, Astrophysics, Planets, Astronomy, Calibration, Motion measurement

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Proceedings Article | 26 June 1995 Paper

Scientific support for space interferometry

Deane Peterson

Proceedings Volume 2477, (1995) https://doi.org/10.1117/12.212986

KEYWORDS: Interferometry, Galactic astronomy, Motion measurement, Stars, Interferometers, Spectroscopy, Imaging spectroscopy, Astronomy, Infrared imaging, Kinematics

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Showing 5 of 9 publications

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