Photometric analysis of HD 19467 based on ASAS data. Top row from left to right: V -band magnitude vs. Heliocentric Julian Day, Lomb-Scargle periodogram, and CLEAN periodogram. For the Lomb-Scargle periodogram, we show the spectral window function (in red), the 99% confidence level (horizontal dashed red line), and the peak corresponding to the rotation period (red vertical mark). Bottom panel: light curve phased with the rotation period. The solid red curve represents the sinusoidal fit.