-
Chapter
Fractures of the Distal Radius
-
Article
Direct detection of a microlens in the Milky Way
The nature of dark matter remains mysterious, with luminous material accounting for at most ∼25 per cent of the baryons in the Universe1,2. We accordingly undertook a survey looking for the microlensing of stars ...
-
Chapter and Conference Paper
The MACHO Project 5.7 Year LMC Results
The MACHO collaboration has analyzed 5.7years of photometry on approximately 11.7 million stars in the Large Magellanic Cloud (LMC) in a search for gravitational microlensing events. Two sets of cuts were used...
-
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...
-
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...
-
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...
-
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...
-
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...
-
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...
-
Article
Possible gravitational microlensing of a star in the Large Magellanic Cloud
THERE is now abundant evidence for the presence of large quantities of unseen
-
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...
-
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...