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  1. No Access

    Chapter

    Effective Sensitivity of a Non-Uniform Phased Array of Short Dipoles

    Short dipoles are a key element in new low frequency array antennas as proposed for LOFAR and other astronomical applications. Unfortunately standard texts on short dipole antennas are based on the effective a...

    W. A. Van Cappellen, J. D. Bregman… in The Square Kilometre Array: An Engineering… (2005)

  2. No Access

    Article

    Effective Sensitivity of A Non-uniform Phased Array of Short Dipoles

    Short dipoles are a key element in new low frequency array antennas as proposed for LOFAR and other astronomical applications. Unfortunately standard texts on short dipole antennas are based on the effective a...

    W. A. Van Cappellen, J. D. Bregman, M. J. Arts in Experimental Astronomy (2004)

  3. No Access

    Chapter and Conference Paper

    Pupil Plane Interferometry: Some Conclusions from SCASIS

    In this contribution we summarize some conclusions from the SCASIS project. The project, which concerns a multiple shearing pupil plane interferometer, was started in 1986 and was concluded in 1992 with the Ph...

    C. M. de Vos, J. D. Bregman, U. J. Schwarz in Very High Angular Resolution Imaging (1994)

  4. No Access

    Chapter

    SCASIS, Diffraction Limited Imaging using a Redundant Pupil Plane Interferometer

    We introduce the concepts of the SCASIS-project. The project aims to realize spectrometry of diffraction limited two-dimensional images from large ground based telescopes. In this paper we describe in detail t...

    C. M. de Vos, J. D. Bregman, U. J. Schwarz in Diffraction-Limited Imaging with Very Larg… (1989)

  5. No Access

    Article

    Nickel, argon and cobalt in the infrared spectrum of SN1987A: the core becomes visible

    Infrared spectra of supernova 1987A taken in April and November 1987 from the Kuiper Airborne Observatory (KAO) show two distinctly different stages in the evolution of the expanding gas shell. In April both t...

    D. M. Rank, P. A. Pinto, S. E. Woosley, J. D. Bregman, F. C. Wittebornt… in Nature (1988)

  6. No Access

    Chapter and Conference Paper

    Airborne and groundbased spectrophotometry of comet P/Halley from 5–13 micrometers

    Spectrophotometry from 5–10μm (Δλ/λ ≈ 0.02) of comet Halley was obtained from the Kuiper Airborne Observatory on 1985 December 12.1 and 1986 April 8.6 and 10.5, UT. 8–13 μm data were obtained on 17.2 December 198...

    J. D. Bregman, H. Campins, F. C. Witteborn, D. H. Wooden… in Exploration of Halley’s Comet (1988)

  7. No Access

    Chapter and Conference Paper

    Reflection Nebulae, Non-Equilibrium Thermal Emission, and IRAS

    The 1–13 micron spectra of visual reflection nebulae are presented, and their implications for the IRAS 12 micron band discussed.

    K. Sellgren, L. J. Allamandola, J. D. Bregman, M. W. Werner… in Light on Dark Matter (1986)

  8. No Access

    Article

    A simulation of the thermal behaviour of the UK-NL millimeter wave telescope

    To keep the thermally induced average telescope deformations within 15 μm, a thermal design goal has been set which limits the temperature difference between all locations in the panels, backing structure and ...

    J. D. Bregman, J. L. Casse in International Journal of Infrared and Millimeter Waves (1985)

  9. No Access

    Chapter and Conference Paper

    Recombination-Line Observations of the Galactic Centre

    Aperture-synthesis observations of the H76α and H11Oα recombination lines are presented for the inner (3pc) region of the Galactic Nucleus. The large line width measured with single dishes (Pauls et al., 1974)...

    J. H. van Gorkom, U. J. Schwarz, J. D. Bregman in The Milky Way Galaxy (1985)