Diffuse Astrophysical Neutrino Measurements With IceCube All Flavor Starting Events

The IceCube Neutrino Observatory at the South Pole detects neutrinos with energies above 100s of GeV via the Cherenkov light emitted by their secondaries as they interact in ice. Events whose vertices are contained inside the detector are named "starting events". At TeV energies the detected events are dominated by atmospheric muons and atmospheric neutrinos, while their fraction with respect to the astrophysical neutrinos dips at 100s of TeV and above. Here we present the Medium Energy Starting Events (MESE) selection that utilizes veto techniques to suppress the atmospheric-muon flux in order to measure the properties of diffuse-astrophysical neutrinos. The veto of muons also helps in suppressing the atmospheric neutrinos in the Southern sky. With neutrinos of energy greater than a TeV, MESE is used to measure the astrophysical spectrum from the whole sky. We can also conduct a measurement of the astrophysical flavour ratio using MESE by including classifiers that identify various event morphologies produced by electron, muon and tau neutrinos.