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We report results from a pilot program to obtain spectroscopy for objectsdetected in the Galaxy Evolution Explorer (GALEX) Medium Imaging Survey (MIS).Our study examines the properties of galaxies detected by GALEX fainter thanthe Sloan Digital Sky Survey (SDSS) spectroscopic survey. This is the firststudy to extend the techinques of Salim et al. 2005 to estimate stellar masses,star formation rates (SFR) and the b (star formation history) parameter forstar-forming galaxies out to z~0.7. We obtain redshifts for 50 GALEX MISsources reaching NUV=23.9 (AB mag), having counterparts in the SDSS DataRelease 4 (DR4). Of our sample, 43 are starforming galaxies with z<0.7, 3 haveemission line ratios indicative of AGN with z<0.7, and 4 objects with z~1 areQSOs, 3 of which are not previously cataloged. We compare our sample to a muchlarger sample of ~50,000 matched GALEX/SDSS galaxies with SDSS spectroscopy;while our survey is shallow, the optical counterparts to our sources reach ~3magnitudes fainter in SDSS r magnitude than the SDSS spectroscopic sample. Weuse emission line diagnostics for the galaxies to determine that the samplecontains mostly star-forming galaxies. The galaxies in the sample populate theblue sequence in the NUV-r vs M_r color-magnitude diagram. Our sample has SFRs,luminosities, and velocity dispersions that are similar to the samples of faintcompact blue galaxies studied previously in the same redshift range by Koo et.al 1995, Guzman et. al 1996 & Phillips et. al 1997. However, our sample is ~2mag fainter in surface brightness than the compact blue galaxies. We find thatthe star-formation histories for a majority of the galaxies are consistent witha recent starburst within the last 100 Myr.

Keck/Deimos Spectroscopy of a GALEX UV Selecte Sample from the Medium Imaging Survey