About 10% of upper main-sequence stars are characterized by the presence of chemical peculiarities, often found together with a structured magnetic field. The atmospheres of most of those chemically peculiar stars present surface spots, leading to photometric variability caused by rotational modulation. The study of the light curves of those stars therefore permits a precise measurement of their rotational period, which is important to study stellar evolution and to plan further detailed observations. We analysed the light curves of 1028 chemically peculiar stars obtained with the STEREO spacecraft. We present here the results obtained for the 337 magnetic chemically peculiar stars in our sample.

Cone search capability for table J/MNRAS/420/757/table1 (Basic properties of the CP2 and CP4 stars identified as constant or for which the quality of the data prevented the detection of any variability)

Cone search capability for table J/MNRAS/420/757/table2 (Basic properties of the CP2 and CP4 stars identified as constant or probably constant after the individualised analysis)

Cone search capability for table J/MNRAS/420/757/table3 (Properties of the CP2 and CP4 stars identified as photometrically variable)