This project was led by Andreas Zezas and Valia Antoniou. See Antoniou et al 2009, ApJ 697, 1695.
This image shows a mosaic of our Cycle 3 Chandra observations. Red: 0.2-1.0 keV; Green: 1.0-2.0 keV; Blue: 2.0-8.0 keV. The pink square is a back illuminated chip, which has different energy sensitivity.