Optimal Source Tracking and Beaming of LISA
Archana Pai
TL;DR
This paper analyzes the beaming properties of optimal data streams in LISA, demonstrating their high directionality and frequency-dependent behavior for tracking monochromatic sources.
Contribution
It investigates the beaming characteristics of LISA's optimal TDI data streams, extending previous work on source tracking to include detailed beaming analysis.
Findings
Streams V+, Vx, Vo are highly beamed.
Beaming varies with frequency.
Streams have maximum, minimum, and zero directional SNR.
Abstract
We revisit the directionally optimal data streams of LISA first introduced in Nayak etal. It was shown that by using appropriate choice of Time delay interferometric (TDI) combinations, a monochromatic fixed source in the barycentric frame can be optimally tracked in the LISA frame. In this work, we study the beaming properties of these optimal streams. We show that all the three streams V+, Vx and Vo with maximum, minimum and zero directional SNR respectively are highly beamed. We study in detail the frequency dependence of the beaming.
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