Observable Effects of Shocks in Compact and Extended Presupernovae
  We simulate shock propagation in a wide range of core-collapsing presupernovae: from compact WR stars exploding as SNe Ib/c through very extended envelopes of the narrow-line SNe IIn. We find that the same physical phenomenon of radiating shocks can produce outbursts of X-ray radiation (with photon energy $3kT \sim 1$ keV) lasting only a second in SNe Ib/c, as well as a very high flux of visual light, lasting for months, in SNe IIn. 
S.Blinnikov (1,6), N.Chugai (2), P.Lundqvist (3), D.Nadyozhin (1,6),   S.Woosley (4), and E.Sorokina (5,6) ((1) ITEP; (2) IN...