Abstract

In the course of a search for faint large proper motion stars, a common proper motion pair was identified having a μ = 0arcsec.38±0arcsec.03 yr-1. The stars are separeted by 23arcsec and have apparent visual magnitudes 18.77 and 19.84, respectively. Spectrophotometry of the stars established that the fainter component is a cold (≡4000K) DC white dwarf, while the brighter one is a magnetic white dwarf with strong Swan bands of C2 shifted and broadened by a ≡108G magnetic field.