Search Results - "Buscher, D. F."

Improvements for group delay fringe tracking by Basden, A. G., Buscher, D. F.

“…Group delay fringe tracking using spectrally dispersed fringes is suitable for stabilizing the optical path difference in ground-based astronomical optical…”
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The Navy Prototype Optical Interferometer by Armstrong, J. T, Mozurkewich, D, Rickard, L. J, Hutter, D. J, Benson, J. A, Bowers, P. F, Elias II, N. M, Hummel, C. A, Johnston, K. J, Buscher, D. F, Clark III, J. H, Ha, L, Ling, L.-C, White, N. M, Simon, R. S

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Constraints on the Geometry of Circumstellar Envelopes: Optical Interferometric and Spectropolarimetric Observations of Seven Be Stars by Quirrenbach, A, Bjorkman, K. S, Bjorkman, J. E, Hummel, C. A, Buscher, D. F, Armstrong, J. T, Mozurkewich, D, Elias II, N. M, Babler, B. L

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Near-focus high-sensitivity wavefront sensing by Bharmal, N. A., Buscher, D. F., Haniff, C. A.

“…A new method of wavefront sensing that uses a pair of equally defocused images to derive the wavefront aberrations is presented. Unlike in conventional…”
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High-resolution imaging of Betelgeuse and Mira by Wilson, R. W., Baldwin, J. E., Buscher, D. F., Warner, P. J.

“…Diffraction-limited images have been made of the M giant stars α Orionis (Betelgeuse) and ο Ceti (Mira), using the non-redundant masking method at the 4.2-m…”
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Diffraction losses in ground-based optical interferometers by Horton, A.J., Buscher, D.F., Haniff, C.A.

“…We present a numerical analysis of free-space propagation of the beams inside a long-baseline optical/infrared interferometer. Unlike the models of beam…”
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Interferometric seeing measurements at the La Palma Observatory by Nightingale, N. S., Buscher, D. F.

“…We describe an interferometric seeing monitor is described which measures the wavefront perturbations due to the atmosphere directly, rather than depending on…”
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Numerical simulations of pinhole and single-mode fibre spatial filters for optical interferometers by Keen, J.W., Buscher, D.f., Warner, P.J.

“…We use a numerical simulation to investigate the effectiveness of pinhole spatial filters for optical/IR interferometers and to compare them with single-mode…”
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Synthetic aperture imaging at infrared wavelengths by Haniff, C. A., Buscher, D. F., Christou, J. C., Ridgway, S. T.

“…Observations of η Oph and γ CrB at a wavelength of 2.2 µm indicate that diffraction-limited images of high dynamic range are routinely attainable with…”
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Detection noise bias and variance in the power spectrum and bispectrum in optical interferometry by Gordon, J. A, Buscher, D. F

“…Long-baseline optical interferometry uses the power spectrum and bispectrum constructs as fundamental observables. Noise arising in the detection of the fringe…”
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Dual-conjugate wavefront generation for adaptive optics by Kelly, T L, Buscher, D F, Clark, P, Dunlop, C, Love, G, Myers, R M, Sharples, R, Zadrozny, A

“…We present results of the isoplanatic performance of an astronomical adaptive optics system in the laboratory, by using a dual layer turbulence simulator. We…”
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Detection of a bright feature on the surface of Betelgeuse by BUSCHER, D. F, HANIFF, C. A, BALDWIN, J. E, WARNER, P. J

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Cleaving optical fibre lengths to high relative accuracy by Chang, Mark P.J.L, Buscher, David F

“…Single-mode fibres are an important component in systems such as ground-based stellar interferometers. A major drawback in using them is the large optical path…”
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The MARTINI adaptive optics instrument by Doel, A.P., Dunlop, C.N., Buscher, D.F., Myers, R.M., Sharples, R.M., Major, J.V.

“…The Multi-Aperture Real Time Image Normalisation Instrument (MARTINI) is an adaptive optics system designed to operate at one of the Nasmyth focal stations of…”
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Recent developments in spectroscopy by Sharples, R.M., Allington-Smith, J.R., Buscher, D.F., Content, R., Haynes, R., Myers, R.M.

“…Recent developments in spectroscopic techniques for 4–8 m telescopes are reviewed, including the use of integral field spectroscopy as a tool to exploit the…”
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Improvements for group delay fringe tracking by Basden, A. G., Buscher, D. F.

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Near-focus high-sensitivity wavefront sensing by Bharmal, N. A., Buscher, D. F., Haniff, C. A.

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ANDES, the high resolution spectrograph for the ELT: science goals, project overview and future developments by Adibekyan, V, Amado, P. J, Bailet, C, Baker, C, Balestra, A, Barnes, S. A, Baron, F, Bellido-Tirado, O, Bergin, E. A, Bigot, L, Bonhomme, L, Bouret, J. -C, Broeg, C. H, Brucalassi, A, Brynnel, J, Cabona, L, Cabral, A, Martins, B. L. Canto, Chazelas, B, Cirami, R, Cook, N. J, Cooke, R. J, Coretti, I, Cristiani, S, Cupani, G, Dadi, K, De Cia, A, Delorme, A, Demangeon, O, de Souza, A. Domiciano, Egner, S, Ehrenreich, D, Faria, J. P, Ferruzzi, D, Feruglio, C, Fontana, A, Frank, B. S, Fuesslein, C, Fynbo, J, Gaessler, W, Gallo, E, Genolet, L, Giacobbe, P, Hernández, J. I. González, Temich, F. Gracia, Haehnelt, M. G, Hughes, I, Huke, P, Ivanisenko, Y, Kaminski, A, Knoche, J, Korn, A. J, Lavail, A, Lavie, B, Lehmitz, M, Liske, J, Maiolino, R, Malo, L, Marques, E. L, Martins, J. H. C, Mason, C. A, Micela, G, Milaković, D, Molliere, P, Mordasini, C, Mucciarelli, A, N'Diaye, M, Niemczura, E, Nisini, B, Palle, E, Pasquini, L, Castro, J. Peñate, Poppenhaeger, K, Porru, M, Quirrenbach, A, Rebolo, R, Reid, D. T, Reiners, A, Romano, D, Rowe, J, Sanna, N, Santos, N. C, Sarajlic, M, Scaudo, A, Schiavon, R. P, Sordet, M, Sortino, F, Spiga, R, Mascareño, A. Suárez, Sulich, A, Tanvir, N. R, Tenegi-Sangines, F, Thompson, S. J, Vallee, P, Vega-Moreno, A, Venn, K. A, Wade, G, Weder, J, Xompero, M, Zanutta, A

“…The first generation of ELT instruments includes an optical-infrared high-resolution spectrograph, indicated as ELT-HIRES and recently christened ANDES…”
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Improvements for group delay fringe tracking by Basden, A. G, Buscher, D. F

“…Mon.Not.Roy.Astron.Soc. 357 (2005) 656-668 Group delay fringe tracking using spectrally-dispersed fringes is suitable for stabilising the optical path…”
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Numerical Simulations of Pinhole and Single Mode Fibre Spatial Filters for Optical Interferometers by Keen, J. W, Buscher, D. F, Warner, P. J

“…Mon.Not.Roy.Astron.Soc. 326 (2001) 1381 We use a numerical simulation to investigate the effectiveness of pinhole spatial filters at optical/IR interferometers…”
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