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PreprintarXiv licencearXiv

No Significant Excess in Typical Variability in CLAS+ Changing-Look AGN Candidates in Rubin DP2

  • Lilianne Nakazono
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Abstract

Rubin Data Preview 2 (DP2) samples the CLAS+ changing-look AGN (CLAGN) candidates ∼1,000−9,000 days after their comparison epochs, so it can test whether these objects retain enhanced short-term optical variability after their spectral transitions. Comparing peak-to-peak amplitude in magnitudes against a photometrically quiescent quasar control, one band at a time, we do not detect a significant median-amplitude excess for any state (turn-on, turn-off, intermediate) in either of two bands, nor a different in the median | Δmag | as function of time lag. The r-band CLAS+ amplitude distributions are wider than the control's, with the intermediate state formally significant after multiple-comparison correction. This could hint for a high-amplitude subpopulation.

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Cite

BibTeXRIS
BibTeX
@misc{nakazono2026significant,
  title = {{No Significant Excess in Typical Variability in CLAS+ Changing-Look AGN Candidates in Rubin DP2}},
  author = {Lilianne Nakazono},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.37876},
  eprint = {2610.37876},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.37876},
}
RIS
TY  - UNPB
TI  - No Significant Excess in Typical Variability in CLAS+ Changing-Look AGN Candidates in Rubin DP2
AU  - Lilianne Nakazono
PY  - 2026
DA  - 2026/10/27
PB  - arXiv
DO  - 10.48550/arxiv.2610.37876
UR  - https://arxiv.org/abs/2610.37876
AB  - Rubin Data Preview 2 (DP2) samples the CLAS+ changing-look AGN (CLAGN) candidates ∼1,000−9,000 days after their comparison epochs, so it can test whether these objects retain enhanced short-term optical variability after their spectral transitions. Comparing peak-to-peak amplitude in magnitudes against a photometrically quiescent quasar control, one band at a time, we do not detect a significant median-amplitude excess for any state (turn-on, turn-off, intermediate) in either of two bands, nor a different in the median | Δmag | as function of time lag. The r-band CLAS+ amplitude distributions are wider than the control's, with the intermediate state formally significant after multiple-comparison correction. This could hint for a high-amplitude subpopulation.
ER  -