  We report on the discovery of periodic dips in the multiband lightcurve of
ISO-ChaI 52, a young stellar object in the Chamaeleon I dark cloud. This is one
among the peculiar objects that display very low or negligible accretion both
in their UV continuum and spectral lines, although they present a remarkable
infrared excess emission characteristic of optically-thick circumstellar disks.
We have analyzed a VLT/X-Shooter spectrum with the tool ROTFIT to determine the
stellar parameters. The latter, along with photometry from our campaign with
the REM telescope and from the literature, have allowed us to model the
spectral energy distribution and to estimate the size and temperature of the
inner and outer disk. From the rotational period of the star/disk system of
3.45 days we estimate a disk inclination of 36$^\circ$. The depth of the dips
in different bands has been used to gain information about the occulting
material. A single extinction law is not able to fit the observed behavior,
while a two-component model of a disk warp composed of a dense region with a
gray extinction and an upper layer with an ISM-type extinction provides a
better fit of the data.
