A Catalog of Spectroscopically Identified White Dwarf Stars in the First Data Release of the Sloan Digital Sky Survey

Abstract

We present the full spectroscopic white dwarf and hot subdwarf sample from\nthe SDSS first data release, DR1. We find 2551 white dwarf stars of various\ntypes, 240 hot subdwarf stars, and an additional 144 objects we have identified\nas uncertain white dwarf stars. Of the white dwarf stars, 1888 are non-magnetic\nDA types and 171, non-magnetic DBs. The remaining (492) objects consist of all\ndifferent types of white dwarf stars: DO, DQ, DC, DH, DZ, hybrid stars like\nDAB, etc., and those with non-degenerate companions. We fit the DA and DB\nspectra with a grid of models to determine the Teff and log(g) for each object.\nFor all objects, we provide coordinates, proper motions, SDSS photometric\nmagnitudes, and enough information to retrieve the spectrum/image from the SDSS\npublic database. This catalog nearly doubles the known sample of\nspectroscopically-identified white dwarf stars. In the DR1 imaged area of the\nsky, we increase the known sample of white dwarf stars by a factor of 8.5. We\nalso comment on several particularly interesting objects in this sample.\n