A STATISTICAL APPROACH TO RECOGNIZING SOURCE CLASSES FOR UNASSOCIATED SOURCES IN THE FIRST FERMI-LAT CATALOG

The Fermi Large Area Telescope First Source Catalog(1FGL) provided spatial, spectral, and temporal properties for a large number of gamma-raysources using a uniform analysis method. After correlating with the most-complete catalogsof source types known to emit gamma rays, 630 of these sources are "unassociated" (i.e. have no obvious counterparts at other wavelengths). Here, we employ two statistical analyses of the primary gamma-raycharacteristics for these unassociated sources in an effort to correlate their gamma-rayproperties with the AGN and pulsarpopulations in 1FGL. Based on the correlation results, we classify 221 AGN-like and 134 pulsar-like sources in the 1FGL unassociated sources. The results of these source "classifications" appear to match the expected source distributions, especially at high Galactic latitudes. While useful for planning future multiwavelength follow-up observations, these analyses use limited inputs, and their predictions should not be considered equivalent to "probable source classes" for these sources. We discuss multiwavelength results and catalogcross-correlations to date