NASA Extragalactic Database
NED • Data Archive • Operational
NASA/IPAC Extragalactic Database (NED) is the world's largest database of cross-correlated multiwavelength data for extragalactic objects, providing a systematic fusion of information integrated from hundred of large sky surveys and tens of thousands of research publications. The contents and services span the entire observed spectrum from gamma rays through radio frequencies.
NED is built around a master list of extragalactic objects for which cross-identifications of names have been established, accurate positions and redshifts entered to the extent possible, and some basic data collected. Bibliographic references relevant to individual objects have been compiled, and abstracts of extragalactic interest are kept on line. Detailed and referenced photometry, position, and redshift data, have been taken from large compilations and from the literature.
NED also includes images from 2MASS, from the literature, and from the Digitized Sky Survey.
NED's data and references are being continually updated, with revised versions being put on-line every 4-6 months.
NED is located within the Infrared Processing and Analysis Center (IPAC).