HST/LCO measurements of the optical extragalactic background light

We present the first detections of the mean flux of the optical extragalactic background Light (EBL) at 3000, 5500, and 8000 Angstrom, derived from coordinated data sets taken at Las Campanas Observatory and with HST. In addition to detections in all three bands, we identify the minimum surface brightness contributed by resolved galaxies (23 < V < 28 AB mag) using a novel method of aperture photometry to which these data are uniquely suited. By comparing these results to the surface brightness from resolved galaxies measured using standard methods of galaxy photometry, we identify systematic errors in the results of faint galaxy photometry and place Limits on the EBL flux originating from undetected sources.