Chandra Release - June 15, 2011

Visual Description: Chandra Deep Field South

This 3-panel image of the Chandra Deep Field South features various shades of blue and gold with white, all on a black background. The left image is dominated by a large number of small gold sources, mostly galaxies and other objects in the field, and a small number of larger blue sources. This composite image from NASA's Chandra X-ray Observatory and Hubble Space Telescope combines the deepest X-ray, optical and infrared views of the sky.  The Chandra Deep Field South was made by pointing the telescope at the same patch of sky for over six weeks of time. In many cases no Chandra sources were detected at the positions of galaxies seen in Hubble data. On the right of the image are two views where the X-ray counts from these locations were stacked on top of one another, to see if a signal emerged in high energy (top) and low energy X-rays (bottom).  This procedure was not performed correctly, and implied the presence of signals that do not exist in the data.