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The Galaxy Evolution Explorer (GALEX) satellite performed the first and onlylarge-area UV survey, which in tandem with the Sloan Digital Sky Survey (SDSS)has facilitated modeling of the spectral energy distributions (SEDs) oflow-redshift galaxies and the determination of various galaxy properties, inparticular the star formation rate. However, the relatively crude angularresolution of GALEX (5") made its images susceptible to blending of sources,resulting in potentially biased far-UV (FUV) and near-UV (NUV) pipelinephotometry. To remedy this issue and take advantage of model-fit photometry, weuse the EMphot software to obtain forced GALEX photometry for ~700,000 SDSSgalaxies at z<0.3. Positional priors of target galaxies and potentiallycontaminating neighbors were taken from SDSS. New photometry is based on thebest-fitting of three model profiles: optical-like, exponential and flat. Newphotometry mitigates blending present in the original pipeline catalogs, whichaffected 16% of galaxies at a level of >0.2 mag and 2% at a level of >1 mag.Pipeline NUV magnitudes are severely affected (>1 mag) when the neighbor isbrighter than the target galaxy and within 10", or when the neighbor is fainterand within ~3" of the target. New photometry fixes edge-of-detector bias, whichaffected pipeline photometry by up to 0.1 mag in NUV. We present catalogs withnew photometry for GALEX observations of different depths, corresponding to theall-sky imaging survey (AIS), medium imaging survey (MIS) and deep imagingsurvey (DIS). Catalogs feature combined magnitudes for multiple detections ofthe same galaxy in a survey.

Improved GALEX UV Photometry for 700,000 SDSS Galaxies