An Anomalously Variable Subpopulation of ISP Blazars Irreducible to Standard Observational Biases in the 4LAC-DR3 Catalog (v3: Internal Substructure of C3)

Q: What does this research mean for the field?

The anomalously variable C3 subpopulation of ISP blazars contains four distinct internal sub-groups, with high-frequency and super-unity amplitude groups suggesting the existence of two physically distinct variability regimes. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Yoshimitsu Katayama

doi:10.5281/zenodo.19776343

April 26, 2026Open Access

An Anomalously Variable Subpopulation of ISP Blazars Irreducible to Standard Observational Biases in the 4LAC-DR3 Catalog (v3: Internal Substructure of C3)

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Key Points

The aim is to analyze a specific subpopulation of ISP blazars to identify distinct variability patterns.
Secondary GMM analysis conducted within the subgroup C3 (n=22)
Identification of four sub-groups: C3a, C3b, C3c, and C3d
Characterization of variability for individual blazars.
C3a contains 11 high-frequency blazars and shows distinct variability compared to C3c with FracVar values of 1.556 and 1.314 respectively.
Four distinct sub-groups are identified based on variability patterns in the ISP blazars.
C3a and C3c indicate two physically distinct variability regimes.

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Implication

Identifies distinct variability regimes in blazar subpopulations, suggesting unique physical characteristics.

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Yoshimitsu Katayama (2026) studied this question.

synapsesocial.com/papers/69f04d9f727298f751e71db6 https://doi.org/10.5281/zenodo.19776343

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An Anomalously Variable Subpopulation of ISP Blazars Irreducible to Standard Observational Biases in the 4LAC-DR3 Catalog (v3: Internal Substructure of C3)

Key Points

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Implication

Abstract

Discussion

Cite This Study

An Anomalously Variable Subpopulation of ISP Blazars Irreducible to Standard Observational Biases in the 4LAC-DR3 Catalog (v3: Internal Substructure of C3)

Key Points

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Abstract

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Cite This Study

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