Simultaneous observation of families and associated air showers at Mt. Chacaltaya

The observation of families and air showers is carried out at Mt. Chacaltaya (5200m, 540 g/cm 2 atmospheric depth, Bolivia) by operating the emulsion chamber and the air shower array simultaneously. We summarize in this paper the results of the experiment, leaving the description of experimental apparatus, experimental procedure, etc. elsewhere (KAWASUMI N. et al., AIP Conf. Proc., 276 (1992) 88; Proc. XXIV ICRC, Rome, 1 (1995) 201). The analysis relies on the data of 47 families of ΣE γ ≥ 10 TeV with the accompaniment of air showers.