  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 pre-burst jets for two different
massive stellar progenitor models. These should be distinguishable by IceCube,
and we discuss the implications.
