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IGR J17091–3624 and IGR J17098–3628 are two X-ray transient s discovered by INTEGRAL and classified as black hole candidates (BHCs). The behaviour of these two sources has been monitored thanks to the analysis of a multi-wavelength data sets collected by different instruments from 2005 until 2008. Since part of this work will be published in t he Astrophysical Journal (January 2009), this proceeding is mostly dedicated to the latest out coming results of this study developed during 2008. In particular we show here the results of the 200 8 Swift ToO data analysis during which IGR J17098–3628 was in a bright soft state while IGR J17 09 -3624 was not detectable. We also report in this paper on a tentative searching of the co unterpart of IGR J17091-3624 in the infrared archives.

Long term multi-wavelength observations campaign of IGR J17091-3624 and IGR J17098-3628, two transient black hole candidates discovered by INTEGRAL: latest results