A search for the counterparts of new HMXB candidates discovered by INTEGRAL

INTEGRAL has accumlated nearly 2 years of data for the survey of the Galacticplane; coverage has been concentrated on the Galactic centre region and largenumbers of LMXBs have been discovered. The exposure is now steadily building upalong other regions of the Galactic plane. This will inevitably mean that moreHMXBs will become visible so that comparable numbers of these younger systemsmay be investigated. We request XMM observing time to find counterparts for 4unidentified persistent INTEGRAL sources discovered by IBIS/ISGRI, clustered ina region tangential to a spiral arm, and thus are good HMXB candidates. We planto measure their Xray spectra and position to permit follow up studies in theoptical/IR bands and thus identify the true nature of the underlying system. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]