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within T. S. Axelrod Remove this filter Astronomy, Observations and Techniques Remove this filter

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  1. No Access

    Chapter and Conference Paper

    A Dedicated Camera For Extragalactic Planetary Nebulae: The Planetary Nebula Spectrograph

    Photometry in [OIII] emission of Planetary Nebulae in external galaxies can be used to determine distances as great as that of the Virgo cluster and beyond, as forcefully argued elsewhere during this conferenc...

    N. G. Douglas, K. Taylor, K. C. Freeman, T. S. Axelrod in Planetary Nebulae (1997)

  2. No Access

    Chapter and Conference Paper

    Properties of LMC Planetary Nebulae and Parent Populations in the MACHO Database

    The MACHO microlensing experiment’s time-sampled photometry database contains blue and red lightcurves for nearly 9 million stars in the central bar region of the Large Magellanic Cloud (LMC). We have identifi...

    D. R. Alves, C. Alcock, R. A. Allsman, T. S Axelrod, A. C Becker… in Planetary Nebulae (1997)

  3. No Access

    Chapter and Conference Paper

    Bulge δ Scuti Stars in the Macho Database

    We describe the search for δ Scuti stars in the MACHO database of bulge fields. Concentrating on a sample of high amplitude δ Scutis, we examine the light curves and pulsation modes. We also discuss their spat...

    D. Minniti, C. Alcock, D. R. Alves… in Fundamental Stellar Properties: The Intera… (1997)

  4. No Access

    Chapter and Conference Paper

    Statistical Issues in the MACHO Project

    The MACHO project is an ongoing survey project which collects photometric timeseries data on roughly 20 million stars in the LMC, SMC, and Galactic bulge. The data is irregularly time sampled, largely due to w...

    T. S. Axelrod, C. Alcock, R. A. Allsman… in Statistical Challenges in Modern Astronomy… (1997)

  5. No Access

    Chapter and Conference Paper

    Optical variability of the LMC supersoft source RX J0513.9-6951

    We present optical spectroscopy and photometry of the LMC supersoft source (SSS) RX J0513.9-6951. Through the exceptional monitoring capabilities of the MACHO project, we show the optical history of this objec...

    K. A. Southwell, M. Livio, P. A. Charles, W. Sutherland… in Supersoft X-Ray Sources (1996)

  6. No Access

    Chapter and Conference Paper

    The CCD Array Camera for the Macho Project

    We have developed an astronomical imaging system tailored to our search for gravitational microlensing by compact objects in the halo and disk of the Galaxy. The challenge of detecting rare microlensing events...

    S. Marshall, C. Alcock, C. W. Akerlof, R. A. Allsman… in Astronomy from Wide-Field Imaging (1994)

  7. No Access

    Chapter and Conference Paper

    The search for massive compact halo objects

    We are develo** a dedicated, semi-automatic system with which we will conduct a definitive search for massive objects (such as brown dwarfs and Jupiters) which plausibly might comprise the dark matter in the...

    C. Alcock, T. S. Axelrod, D. P. Bennett, K. H. Cook, H. -S. Park… in Gravitational Lenses (1992)