VizieR Online Data Catalog: Large Quasar Astrometric Catalogue 3 (LQAC-3) (Souchay+, 2015)

We carried out the cross-identification between the 9 catalogs of quasars chosen for their huge number of objects, including all the available data related to magnitudes, radiofluxes, and redshifts.

This cross identification was particularly delicate because of a slight change in coordinates between the objects common to two successive releases of the SDSS and the elimination of some of them.

Equatorial coordinates were recomputed more accurately according to the algorithms used for the elaboration of the Large Quasar Reference Frame (LQRF).

Moreover, absolute magnitudes and morphological indexes of the new objects were given, following the same method as in the LQAC-2.

Our final catalog, called LQAC-3, contains 321 957 objects including a small proportion of AGNs (14 128) and BLLac (1183).

This is roughly 70% more than the number of objects recorded in the LQAC-2.

The LQAC-3 will be useful for the astronomical community since it gives the most complete information available about the whole set of already recorded quasars, with emphasis on the precision and accuracy of their coordinates with respect to the ICRF2.

(1 data file).