Optical light curves of light-weight supermassive black holes produced by the Zwicky Transient Facility Forced Photometry Service

TL;DR

This paper introduces an algorithm to correct optical light curves from the Zwicky Transient Facility, enabling detailed variability analysis of lightweight supermassive black holes and revealing a new tidal disruption event candidate.

Contribution

We developed a correction algorithm for optical light curves and applied it to study variability in lightweight SMBHs, discovering a new TDE candidate.

Findings

Detected variability in nearly all studied sources.

Analyzed variability dependence on X-ray luminosity.

Identified a new candidate tidal disruption event.

Abstract

In this paper, we present an algorithm to correct optical light curves obtained using The Zwicky Transient Facility Forced Photometry Service and its application to the analysis of optical variability of 136 actvie galactic nuclei (AGN) powered by "light-weight" supermassive black holes (SMBH; $M_{BH}$<2*10^6 $\odot$) including 24 intermediate-mass black holes (IMBH; $M_{BH}$<2*10^5 $\odot$). We detected variability in nearly all sources and also analyzed its dependence on the X-ray luminosity for 101 objects. We also identified a previously unknown candidate tidal disruption event (TDE) in SDSS~J112637.74+513423.0.