Wednesday 27 October, at 14:00 in Holzblat Hall (7). BABY SUPERNOVAE - FROM SHOCK BREAKOUT TO RECOMBINATION Speaker: Udi Nakar Abstract: The first light from a supernova emerges once the shock that crosses the progenitor star breaks out of the stellar surface. This flash of light, typically in UV or X-ray, is followed by a broken power-law decay of luminosity and temperature, generated by radiation that leaks out of the expanding gaseous sphere. The early supernova emission provides a wealth of unique information on the progenitor and the explosion. However, its short duration makes it very difficult to detect. In recent years, detection of supernovae soon after explosion became more frequent, where most notable is the detection of an X-ray flash from the shock breakout of a nearby type Ibc supernova. In this talk, I will review the physics of shock breakout and the following emission, focusing on what can be learned from future observations