Melvyn Wright

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Our group, the Center for Astronomy Signal Processing and Electronics Research (CASPER), seeks to speed the development of radio astronomy signal processing instrumentation by designing and demonstrating a scalable, upgradeable, FPGA-based computing platform and software design methodology that targets a range of realtime radio telescope signal processing(More)
Approximately 10% of active galactic nuclei exhibit relativistic jets, which are powered by the accretion of matter onto supermassive black holes. Although the measured width profiles of such jets on large scales agree with theories of magnetic collimation, the predicted structure on accretion disk scales at the jet launch point has not been detected. We(More)
We present the first 1.3 mm (230 GHz) very long baseline interferometry model image of an AGN jet using closure phase techniques with a four-element array. The model image of the quasar 1924-292 was obtained with four telescopes at three observatories: the James Clerk Maxwell Telescope (JCMT) on Mauna Kea in Hawaii, the Arizona Radio Observatory’s(More)
We present results of a comprehensive multi-frequency study of the radio galaxy B3 J2330+3927. The 1. 9 wide radio source, consisting of 3 components, is bracketed by 2 objects in our Keck K−band image. Optical and near-IR Keck spectroscopy of these two objects yield z = 3.087 ± 0.004. The brightest (K = 18.8) object has a standard type II AGN spectrum, and(More)
We present λ 1.3mm CARMA observations of dust polarization toward 30 star-forming cores and 8 star-forming regions from the TADPOL survey. We show maps of all sources, and compare the ∼ 2.5′′ resolution TADPOL maps with ∼ 20′′ resolution polarization maps from single-dish submillimeter telescopes. Here we do not attempt to interpret the detailed B-field(More)
Authors: Sheperd Doeleman (MIT Haystack Observatory) Eric Agol (U. Washington) Don Backer (UC Berkeley) Fred Baganoff (MIT) Geoffrey C. Bower (UC Berkeley) Avery Broderick (CITA) Andrew Fabian (U. Cambridge) Vincent Fish (MIT Haystack Observatory) Charles Gammie (U. Illinois Urbana-Champaign) Paul Ho (ASIAA) Mareki Honma (NAOJ) Thomas Krichbaum (MPIfR) Avi(More)
In this study we examine the science and engineering issues involved in optimizing the SKA for survey science. Three Key Science projects require all-sky or 1000 sq deg surveys. Survey science requires low frequency, low resolution images with superb image quality, which imposes stringent requirements on the calibration and sidelobe levels at every stage of(More)
This paper describes how the Connoisseur advanced control package has been successfully applied to the broke and retention systems of a high-speed paper machine to provide increased stability and runnability. The paper provides an explanation of the plant testing, identification and modelling techniques used to develop a model-based predictive controller.(More)
A new generation of radio telescopes is achieving unprecedented levels of sensitivity and resolution, as well as increased agility and field-of-view, by employing highperformance digital signal processing hardware to phase and correlate large numbers of antennas. The computational demands of these imaging systems scale in proportion to BMN2, where B is the(More)