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 an... ▽ More 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.