Unassociated Fermi-LAT sources provide a population with discovery potential. We discuss efforts to find new source associations for this population, and summarize the successes to date. We discuss how the measured gamma-ray properties of associated LAT sources can be used to describe the gamma-ray behavior of more-numerous source classes. Using classification techniques exploiting only these gamma-ray properties, we separate the LAT 2FGL catalog sources into pulsar and AGN candidates.
@article{arxiv.1206.2571,
title = {Fermi's Mystery Sources: Methods for Classification and Association},
author = {Elizabeth C. Ferrara and Roopesh Ojha and Maria Elena Monzani and Nicola Omodei},
journal= {arXiv preprint arXiv:1206.2571},
year = {2012}
}