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- University of Massachusetts AmherstUS10 papers
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8 papers · 1 filter
Optical Spectral Properties of Swift BAT Hard X-ray Selected Active Galactic Nuclei Sources
Lisa M. Winter, Karen T. Lewis, Michael Koss +3
The Swift Burst Alert Telescope (BAT) survey of Active Galactic Nuclei (AGN) is providing an unprecedented view of local AGNs (<z> = 0.03) and their host galaxy properties. In this…
Bipolar jets produced by a spectroscopic binary
Reinhard Mundt, Catrina M. Hamilton, William Herbst +2
We present evidence that the spectroscopically identified bipolar jets of the pre-main sequence binary KH 15D are a common product of the whole binary system, rather than being lau…
Optical and X-ray Properties of the Swift BAT-detected AGN
L. Winter, R. Mushotzky, K. Lewis +3
The Swift Gamma-Ray Burst satellite has detected a largely unbiased towards absorption sample of local () AGN, based solely on their 14--195 keV flux. In the firs…
Symbolic dynamics for nonhyperbolic systems
David Richeson, Jim Wiseman
We introduce index systems, a tool for studying isolated invariant sets of dynamical systems that are not necessarily hyperbolic. The mapping of the index systems mimics the expans…
Learning-rate dependent clustering and self-development in a network of coupled phase oscillators
Ritwik K. Niyogi, L. Q. English
We investigate the role of the learning rate in a Kuramoto Model of coupled phase oscillators in which the coupling coefficients dynamically vary according to a Hebbian learning ru…
Structure of the Accretion Flow in Broad-Line Radio Galaxies: The Case of 3C390.3
R. M. Sambruna, J. N. Reeves, V. Braito +8
We present XMM and Suzaku observations of the Broad-Line Radio Galaxy (BLRG) 3C390.3. The Fe Ka line has a width FWHM ~ 8,800 km/s, consistent within a factor two with the width of…