X - ray to TeV γ - ray broad band emitter

Within the sample of unidentified γ-ray sources found in the first survey of our Galaxy, AX J1838.0-065 is particularly interesting due to its likely physical association with the newly discovered TeV source HESS J1837-069 (Aharonian et al. 2005a). In fact, its position coincides with the center of gravity of the TeV emission and therefore has been suggested by Aharonian et al. (2005a) as the most promising counterpart candidate for HESS J1837069. Here, we report on INTEGRAL observations of AX J1838.0-0655 showing substantial emission in soft γ-rays, compare them with previous X-ray measurements as well as with the TeV data, describe the search for counterparts at other wavebands and discuss the possible nature of the source on the basis of our findings.