2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/2899We have searched for long periodicity in ten X-ray selected Blasers with RXTE ASM 4.6 years data. We found about 10-100 day possible periodicities for three TeV gamma ray Blasers, Mkn 421, Mkn 501 and PKS 2155-304.5 pages, to appear in 27th ICRC proceedingAstrophysicstext