The Possibility for The Detection of the Sub-TeV Gamma-Ray Emission from Fermi Blazars

Measurements of the very high energy(VHE) gamma-ray flux from high-redshift blazars are useful for understanding the cosmological evolution of galaxies, because gamma-ray emission from distant blazars is affected by Extragalactic Background Light(EBL). We searched for the detectable VHE gamma-ray blazars with known redshifts using Fermi archive data and selected three high-redshift sources, PKS 0118-272(z=0.558), PKS0454-234(z=1.003) and PKS 1244-255(z=0.633).