Near-Infrared Identification of the Dimmest X-ray Sources on the Galactic Plane with the ESO/NTT SOFI Camera

We have carried out a deep X-ray observation on a typical Galactic plane region with the Chandra ACIS-I instrument with unprecedented sensitivity and spatial resolution, and detected 274 unidentified X-ray point sources in the ~500 arcmin2 region. In order to identify these new X-ray sources, we have carried out a near infrared follow-up observation using ESO/NTT infrared camera on 2002/7/28 and 2002/7/29. Initial results are briefly reported.