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Gravitational Microlensing Results from MACHO
The MACHO Collaboration, W. Sutherland, C. Alcock +17
The MACHO project is searching for dark matter in the form of massive compact halo objects (Machos), by monitoring the brightness of millions of stars in the Magellanic Clouds to s…
Multiwavelength observations of short time-scale variability in NGC 4151. III. X-ray and Gamma-ray observations
R. S. Warwick et al
A series of {\sl ROSAT\/}, {\sl ASCA\/} and Compton Gamma-Ray Observatory ({\sl CGRO\/}) observations of the Seyfert galaxy NGC 4151 were carried out during the period 1993 Novembe…
Multiwavelength observations of short time-scale variability in NGC 4151. IV. Analysis of multiwavelength continuum variability
R. A. Edelson et al
This paper combines data from the three preceding papers in order to analyze the multi-waveband variability and spectral energy distribution of the Seyfert~1 galaxy NGC~4151 during…
Multiwavelength observations of short time-scale variability in NGC 4151. II. Optical observations
S. Kaspi et al
We present the results of an intensive ground-based spectrophotometric monitoring campaign of the Seyfert galaxy NGC~4151 for a period of over two months, with a typical temporal r…