The next SDSS white dwarf catalog

We have begin work on the next Sloan Digital Sky Survey (SDSS) spectroscopically-identified white dwarf catalog. It will feature white dwarf stars from Data Release 7, the final data release from the SDSS-I and SDSS-II surveys. Besides incorporating the latest spectrophotometry improvements from the SDSS, we have improved our spectroscopic models and expanded our grid. We expect on the order of 5000–6000 additional white dwarf stars not included in the earlier Data Release 4 catalog.