  We use a hysteretic Josephson junction as an on-chip detector of the third
moment of shot noise of a tunnel junction. The detectable bandwidth is
determined by the plasma frequency of the detector, which is about 50 GHz in
the present experiment. The third moment of shot noise results in a measurable
change of the switching rate when reversing polarity of the current through the
noise source. We analyze the observed asymmetry assuming adiabatic response of
the detector.
