The Fermi-LAT Collaboration
The Fermi Large Area Telescope First Source Catalog (1FGL) provided spatial,
spectral, and temporal properties for a large number of gamma-ray sources using
a uniform analysis method. After correlating with the most-complete catalogs of
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-ray characteristics for these
unassociated sources in an effort to correlate their gamma-ray properties with
the AGN and pulsar populations 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 catalog cross-correlations to date, and provide new
source associations for 229 Fermi-LAT sources that had no association listed in
the 1FGL catalog. By validating the source classifications against these new
associations, we find that the new association matches the predicted source
class in ~80% of the sources.
View original:
http://arxiv.org/abs/1108.1202
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