Light curves of NGC 1566. Top panel: Swift/BAT flux (14−150 keV; F_{14−150 keV}). Middle panel: Swift/XRT flux (F_2−10 keV; 2−10 keV). Bottom panel: ALMA band 6 flux (230 GHz; F_230 GHz). The F₁₄₋₁₅₀ keV, F₂₋₁₀ keV, and F_230 GHz are given in units of erg cm⁻² s⁻¹. The blue circles and orange diamonds represent the data from type 1 and type 2 states, respectively. The Swift/BAT data are obtained from the BAT 157-month catalog and the BAT hard X-ray transient monitor for two periods, until 2017 and after 2018, respectively. Due to unavailability of the data, there is a gap between January 2018 and December 2018 in the Swift/BAT light curve. The BAT data are binned over 30 days, while the XRT data correspond to single exposures.