The jet of BP Tau

Context. A strong global magnetic field of young low-mass stars and a high accretion rate are the necessary conditions for the formation of collimated outflows (jets) from these objects. But it is still unclear whether these conditions are also sufficient.
Aims: We aim to check whether BP Tau, an actively accreting young star with a strong magnetic field, has a jet.
Methods: We carried out narrowband [S II] 672 nm imaging and spectroscopic observations of BP Tau and its vicinity.
Results: We find that BP Tau is a source of a Herbig-Haro flow (assigned number HH 1181), which includes two HH objects moving from the star in opposite directions and a micro- (counter-) jet of ∼1″ projected length. The flow is oriented along position angle 59 ± 1°.