Photometry time series of η Chamaeleontis members: left columns display time segments of magnitudes versus HJD. Only the first panel shows the complete series. Middle columns display the Lomb-Scargle periodograms with the 99% confidence level indicated by an horizontal dashed line. Black panels indicate no period detection above the 99% confidence level. Right columns display the light curves phased with the rotation period and the first HJD as initial epoch. Solid lines represent the sinusoidal fit with the rotation period.