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The catalogue of chromospherically active binaries (CABs) has been revised and updated. With 203 new identifications, the number of CAB stars is increased to 409. The catalogue is available in electronic format where each system has a number of lines (suborders) with a unique order number. The columns contain data of limited numbers of selected cross references, comments to explain peculiarities and the position of the binarity in case it belongs to a multiple system, classical identifications (RS Canum Venaticorum, BY Draconis), brightness and colours, photometric and spectroscopic data, a description of emission features (Ca  ii  H and K,  H α  , ultraviolet, infrared), X‐ray luminosity, radio flux, physical quantities and orbital information, where each basic entry is referenced so users can go to the original sources.

A catalogue of chromospherically active binary stars (third edition)