Measurements of binary stars with coherent integration of NPOI data

Anders M. Jorgensen; H. Schmitt; R. Hindsley; J. T. Armstrong; T. A. Pauls; D. Mozurkewich; D. J. Hutter; C. Tycner

doi:10.1117/12.790290

28 July 2008 Measurements of binary stars with coherent integration of NPOI data

Anders M. Jorgensen, H. Schmitt, R. Hindsley, J. T. Armstrong, T. A. Pauls, D. Mozurkewich, D. J. Hutter, C. Tycner

Proceedings Volume 7013, Optical and Infrared Interferometry; 701342 (2008) https://doi.org/10.1117/12.790290
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

In this paper we use coherently integrated visibilities (see separate paper in these proceedings¹) to measure the properties of binary stars. We use only the phase of the complex visibility and not the amplitude. The reason for this is that amplitudes suffer from the calibration effect (the same for coherent and incoherent averages) and thus effectively provide lower accuracy measurements. We demonstrate that the baseline phase alone can be used to measure the separation, orientation and brightness ratio of a binary star, as a function of wavelength.

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Anders M. Jorgensen, H. Schmitt, R. Hindsley, J. T. Armstrong, T. A. Pauls, D. Mozurkewich, D. J. Hutter, and C. Tycner "Measurements of binary stars with coherent integration of NPOI data", Proc. SPIE 7013, Optical and Infrared Interferometry, 701342 (28 July 2008); https://doi.org/10.1117/12.790290

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