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I present the first results of a search for clusters of galaxies in ChandraACIS pointed observations at high galactic latitude with exposure times largerthan 10 ks. The survey is being carried out using the Voronoi Tessellation andPercolation technique, which is particularly suited for the detection andaccurate quantification of extended and/or low surface brightness emission inX-ray imaging observations. A new catalogue of 36 cluster candidates has beencreated from 5.55 square degrees of surveyed area. Five of these candidateshave already been associated to visible enhancements of the projected galaxydistribution in low deepness DSS-II fields and are probably low-to moderateredshift systems. Three of the candidates have been identified in previousROSAT-based surveys. I show that a significative fraction (30-40%) of thecandidate clusters are probably intermediate to high redshift systems. In thispaper I publish the catalogue of these first candidate clusters. I also derivethe number counts of clusters and compare it with the results of deepROSAT-based cluster surveys.Comment: 28 pages, 20 figure

A deep cluster survey in Chandra archival data. First results