The main catalogs is a short list comprising some of the most relevant catalogs or surveys in many fields. Find counterparts in your favourite catalogs under VizieR . Users may submit a list containing the encoded names of what they consider the most relevant catalogs for their research purposes, and counterparts will be sought in those catalogs only. Compare data against ONE catalog under VizieR . The user knows well the content of a catalog and wishes to correlate against it.
Correlation is open to all numerical quantities.
Compare against catalogs with similar content under VizieR . Positional Cross Correlator designed to minimize the time to determine whether a catalog contains information in a certain region of the sky or not. Quick search mechanism takes advantage of the querying system of VizieR to determine the matching elements. High Flexibility to the user so that a number of alternatives can be selected with ease and speed. Non positional Cross correlation by all numerical quantities stored in catalogs implies that users will be able to perform N-dimensional space analysis with as many numerical quantities as desired.