List of transiting circumsecondary disks
This is a list of binary systems that have a primary star eclipsed, as seen from Earth, by a circumstellar disk around the secondary (including possible ring systems). A circumsecondary disk is a disk of gas and/or dust around a star, white dwarf or substellar object that is a secondary in a star system.
Source: Wikipedia — List of transiting circumsecondary disks (CC BY-SA 4.0)