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Cosmology, Relativity, and Gravity Commons™

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Selected Works

2008

Articles 1 - 2 of 2

Full-Text Articles in Cosmology, Relativity, and Gravity

Gravitational Wave Burst Source Direction Estimation Using Time And Amplitude Information, J. Markowitz, M. Zanolin, L. Cadonati, E. Katsavounidis Dec 2008

Gravitational Wave Burst Source Direction Estimation Using Time And Amplitude Information, J. Markowitz, M. Zanolin, L. Cadonati, E. Katsavounidis

Michele Zanolin

In this article we study two problems that arise when using timing and amplitude estimates from a network of interferometers (IFOs) to evaluate the direction of an incident gravitational wave burst (GWB). First, we discuss an angular bias in the least squares timing-based approach that becomes increasingly relevant for moderate to low signal-to-noise ratios. We show how estimates of the arrival time uncertainties in each detector can be used to correct this bias. We also introduce a stand alone parameter estimation algorithm that can improve the arrival time estimation and provide root-sum-squared strain amplitude (h(rss)) values for each site. In …

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Estimation Of Planetary Orbits Via Vectorial Relativity (Vtr), Jorge A. Franco Sep 2008

Estimation Of Planetary Orbits Via Vectorial Relativity (Vtr), Jorge A. Franco

Jorge A Franco

The equation (approximate) for the Movement of Planets about a Massive Body, according to the theory VTR, is: d2u/(d2) + (1-6).u = , where u = 1/r and  are parameters. Applying the previous model we obtain the paths of several planets of the Solar System. In addition we obtain the precession for every planet using the formula given by the Vectorial Relativity and we compare it with the values of the precession given by the GTR (General Theory of the Relativity).

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