Cool Stars 14 - Submitted Abstract # 182 This version created on 05 October 2006 Measuring the Luminosity Function of Low-Mass Stars With Matched Survey Datasets Kevin Covey, Harvard-Smithsonian Center for Astrophysics John Bochanski, University of Washington Suzanne Hawley, University of Washington I.N. Reid, Space Telescope Science Institute David Golimowski, Johns Hopkins University We present an initial measurement of the luminosity and mass functions of low mass stars as constructed from a catalog of matched Sloan Digital Sky Survey (SDSS) and 2 Micron All Sky Survey (2MASS) point sources. We have assembled a photometric catalog of 25,000+ matched SDSS and 2MASS point sources, spanning over 30 square degrees on the sky. We have also obtained follow-up spectroscopy, complete to J=16, of 500+ low mass dwarf candidates within a 1 square degree sub-sample, and thousands of additional dwarf candidates in the remaining 29 square degrees. This spectroscopic sample verifies that less than 1% of the photometric catalog is affected by incompleteness, contamination, or bias. Using this sample, we derive the luminosity and mass functions of low-mass stars over nearly a decade in mass ( 0.7 M_solar < M_* < 0.1 M_solar), and compare our findings to previous results. Having validated this method to generate a low mass luminosity function from matched SDSS/2MASS datasets, future studies will extend this technique to the entirety of the SDSS/2MASS overlap. ----------------------------------