Go to the Chandra Data FTP Archive . The images are located in the science directory, but not in a very user-friendly manner. In the science directory, there is a subdirectory for each cycle (or calendar year) that Chandra has been operating. The sub-directories are titled ao (where the number nn stands for the Chandra operating year, with 00 standing for the year beginning in mid-1999 when Chandra began observations). Within each ao sub-directory are further sub-drectories (each named cat) which contain objects of homogeneous type. types are 0 Non-celestial (Engineering) Observation 1 Solar System 2 Normal Stars and White Dwarfs 3 White Dwarf Binaries and Cataclysmic Variables 4 Black Hole and Neutron Star Binaries 5 Supernovae, Supernova Remnants, and Isolated Neutron Stars 6 Normal Galaxies 7 Active Galaxies and Quasars 8 Clusters of Galaxies 9 Extragalactic Diffuse Emission and Surveys and Galactic Diffuse Emission and Surveys Therefore, the cat1 sub-directory contai
