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IGR J17091-3624 and IGR J17098-3628 are two X-ray transients discovered byINTEGRAL and classified as possible black hole candidates (BHCs). We presenthere the results obtained from the analysis of multi-wavelength data setscollected by different instruments from 2005 until the end of 2007 on bothsources. IGR J17098-3628 has been regularly detected by INTEGRAL and RXTE overthe entire period of the observational campaign; it was also observed withpointed observations by XMM and Swift/XRT in 2005 and 2006 and exhibited fluxvariations not linked with the change of any particular spectral features. IGRJ17091-3624 was initially in quiescence (after a period of activity between2003 April and 2004 April) and it was then detected again in outburst in theXRT field of view during a Swift observation of IGR J17098--3628 on 2007 July9. The observations during quiescence provide an upper limit to the 0.2-10 keVluminosity, while the observations in outburst cover the transition from thehard to the soft state. Moreover, we obtain a refined X-ray position for IGRJ17091-3624 from the Swift/XRT observations during the outburst in 2007. Thenew position is inconsistent with the previously proposed radio counterpart. Weidentify in VLA archive data a compact radio source consistent with the newX-ray position and propose it as the radio counterpart of the X-ray transient.

The two INTEGRAL X-ray transients IGR J17091--3624 and IGR J17098--3628: a multi-wavelength long term campaign