Comparison of the neutrino light curve with quark-hadron phase transition for a 10 M_⊙ progenitor at 10 kpc distance. Three neutrino oscillation scenarios are shown (see legend). The observation of the sharp induced burst, 257 ms  < t <    261 ms after the onset of neutrino emission, would constitute direct evidence of quark matter. The hatched 1   σ-band corresponding to detector noise has a width of about  ± 70 counts.