出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We report on a new method to identify active galactic nuclei (AGN) among unidentified INTEGRAL sources. This method consists of cross-correlating unidentified objects listed in the fourth IBIS survey with infrared (IR) and radio catalogues to look for possible counterparts and then verifying, by means of X-ray and optical follow-up observations, the likelihood of these associations. In particular we discuss here a sample of eight objects, six of which have been possibly identified as AGN.
