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Other literature type . 2024
License: CC BY
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Conference object . 2024
License: CC BY
Data sources: Datacite
ZENODO
Conference object . 2024
License: CC BY
Data sources: Datacite
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Quasar harmonic eXplorer (QhX): Supporting LSST Data Classification of Periodic Phenomena

Authors: Kovacevic, Andjelka;

Quasar harmonic eXplorer (QhX): Supporting LSST Data Classification of Periodic Phenomena

Abstract

We present the Quasar Harmonic Explorer, a tool designed for thorough period analysis in quasar light curves. Displayed on the left, its architecture uses the cross-correlation of wavelet matrices from light curves. This approach complements traditional frequency domain period mining. The tool identifies and classifies periodic phenomena, and it could be integrated with various platforms, which enhances its utility in diverse research contexts. A key component of our Explorer is the Statistical Robovetters feature. It offers categorization, underpinned by error and significance assessments and intersection over union metric. This translates to more reliable and accurate interpretations of detected periods. Additionally, the Explorer's capability for Dynamic Visualization provides an interactive platform that simplifies complex periodic phenomena, making it more accessible to users. On the right, we illustrate the tool's effectiveness in the nonlinear regime of alerts, particularly in analyzing three-point data. Through a simulation of red noise with a 10 Hz sinusoid, we linearly interpolated three points from each flare feature. We then calculated auto-correlation maps of wavelet matrices for each triplet, revealing how topological maps change with the amplitude and shape of triplets. Segments 1, 2, and 8 show coherent clusters of correlation at 10Hz, indicating significant alerts. Homogeneous maps, conversely, indicate less significant flares. For two-point alerts, a linear gradient measurement strategy could be employed to analyze magnitude differences over time. In summary, the Quasar Harmonic Explorer is a versatile tool, effective not only in analyzing light curves but also in detecting meaningful signals across sets of triplet alerts.

Keywords

binary quasar, quasar, nonlinear method, periodicity detection

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green