SQuAD Spectroscopic Quasar Anomaly Detection

Projects

There are three projects under SQuAD as of May 2025. We have used UV spectra to find anomalous QSOs and study variablity trends. Optical spectra has been utilized to find anomalous NLSy1 galaxies. All spectra so far have been obtained from the Sloan Digital Sky Survey Data Release 16 (SDSS DR16).

publication catalog
SQuAD I
SQuAD I Rest Frame UV Spectra

Ten anomaly Groups.

resource
SQuAD II
SQuAD II Rest frame optical NLSy1s

Three anomaly groups.

resource

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SQuAD III
SQuAD III Multi-epoch rest frame UV ratio spectra

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resource publication
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software
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software