New blazar candidates from the 9Y-MST catalogue detected at energies higher than 10 GeV

Abstract

We present a list of 24 new blazar candidates selected in a search for possible counterparts of spatial clusters of γ -ray photons in the recent 9Y-MST catalogue, at energies higher than 10 GeV and at Galactic latitudes higher than 20°. 13 of these clusters are also included in the preliminary release of the 4FGL catalogue of γ -ray sources. The search for possible counterparts is based on the possible associations of the clusters with radio sources within a circle having a radius of 6'. We then investigated the possible optical or mid-IR associations of these sources, checking if they show some properties typical of new blazar candidates.