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A Catalog of Northern Stars With Annual Proper Motions Larger Than 0.15 Seconds of Arc (LSPM catalog - North)

The LSPM-north catalog is a comprehensive list of 61,977 stars north of the J2000 celestial equator that have proper motions larger than 0.15 seconds of arc per year (local-background-stars frame). The catalog has been generated primarily as a result of our systematic search for high proper motion stars in the Digitized Sky Surveys using our SUPERBLINK software. At brighter magnitudes, the catalog incorporates stars and data from the Tycho-2 Catalogue and also, to a lesser extent, from the All-sky Compiled Catalogue of 2.5 million stars. The LSPM catalog expands considerably over the old Luyten (LHS, NLTT) catalogs, superseding them for northern declinations. Corrections to the local-background-stars proper motions have been calculated, and absolute proper motions in the extragalactic frame are given. The catalog is estimated to be over 99% complete at high Galactic latitudes (|b>15|), and over 90% complete at low Galactic latitudes (|b<15|), down to a magnitude V=19.0, and has a limiting magnitude V=21.0. All the northern stars listed in the LHS and NLTT catalogs have been re-identified, and their positions, proper motions and magnitudes re-evaluated. The catalog also lists a large number of completely new objects, which promise to expand very significantly the census of red dwarfs, subdwarfs, and white dwarfs in the vicinity of the Sun.