The <i>V</i>-band Variability of NGC 4151

Abstract We present V -band continuum light curves of the active galactic nucleus (AGN) in NGC 4151 created from a new photometric monitoring campaign with the Las Cumbres Observatory network. A total of 336 images were collected from 2023 December to 2024 June, with an average cadence of ∼2 images per day. Using aperture photometry and image subtraction, we constructed continuum light curves. Though both techniques generated similar light curves and demonstrated AGN variability on the scale of Δ V ≈ 0.4 mag, the galactic starlight contribution to the aperture photometry light curve produced a flux offset of ∼19% within a circular aperture of radius 3 1. The final light curves from this work will be compared against the variability of the broad emission lines to constrain the mass of the supermassive black hole and to model the broad-line region kinematics and geometry in NGC 4151.