Neutrino tomography of gamma ray bursts and massive stellar collapses

Neutrinos at energies above TeV can serve as probes of the stellar progenitor and jet dynamics of gamma ray bursts arising from stellar core collapses. They can also probe collapses which do not lead to gamma rays, which may be much more numerous. We calculate detailed neutrino spectra from shock accelerated protons in jets just below the outer stellar envelope, before their emergence. We present neutrino flux estimates from such preburst jets for two different massive stellar progenitor models. These should be distinguishable by IceCube, and we discuss the implications.