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The IBIS imager on board INTEGRAL, with a sensitivity better than a mCrab indeep observations and a point source location accuracy of the order of fewarcminutes, has localized so far 723 hard X-ray sources in the 17--100 keVenergy band, of which a fraction of about 1/3 are still unclassified. The aimof this research is to provide sub-arcsecond localizations of the unidentifiedsources, necessary to pinpoint the optical and/or infrared counterpart of thoseobjects whose nature is so far unknown. The cross-correlation between the newIBIS sources published within the fourth INTEGRAL/IBIS Survey catalogue and theCHANDRA/ACIS data archive resulted in a sample of 5 not yet identified objects.We present here the results of CHANDRA X-ray Observatory observations of thesefive hard X-ray sources discovered by the INTEGRAL satellite. We associated IGRJ10447-6027 with IR source 2MASSJ10445192-6025115, IGR J16377-6423 with thecluster CIZA J1638.2-6420, IGR J14193-6048 with the pulsar with nebula PSRJ1420-6048 and IGR J12562+2554 with the Quasar SDSSJ125610.42+260103.5. Wesuggest that the counterpart of IGR J12288+0052 may be an AGN/QSO type~2 at aconfidence level of 90%.

Five new INTEGRAL unidentified hard X-Ray sources uncovered by Chandra