We investigate the flux of supernova relic neutrinos ( SRN ) for several neutrino oscillation models with parameters inferred from recent experimental results .
In the calculation , we adopt the realistic time-dependent supernova density profile , which is very different from the static progenitor profile owing to shock propagation .
The Earth matter effect is also included appropriately using realistic density profile of the Earth .
As a result , these two effects are found to induce the flux difference by a few % in the detection energy range ( E _ { \nu } > 19.3 MeV ) .
We also set 90 % C.L .
upper limit on SRN flux for various oscillation models using the recently released observational result by Super-Kamiokande ( SK ) .
In the near future , further reduced upper limit is actually expected , when the current SK data are reanalyzed using some technique to reduce background events against SRN signals .
It is expected that the reduced upper limit is sufficient to provide useful implications for neutrino oscillation .