%0 Journal Article
%T Search for Spatially Extended Fermi-LAT Sources Using Two Years of Data
%A Joshua Lande
%A Markus Ackermann
%A Alice Allafort
%A Jean Ballet
%A Keith Bechtol
%A Toby Burnett
%A Johann Cohen-Tanugi
%A Alex Drlica-Wagner
%A Stefan Funk
%A Francesco Giordano
%A Marie-Helene Grondin
%A Matthew Kerr
%A Marianne Lemoine-Goumard
%J Physics
%D 2012
%I arXiv
%R 10.1088/0004-637X/756/1/5
%X Spatial extension is an important characteristic for correctly associating gamma-ray-emitting sources with their counterparts at other wavelengths and for obtaining an unbiased model of their spectra. We present a new method for quantifying the spatial extension of sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi). We perform a series of Monte Carlo simulations to validate this tool and calculate the LAT threshold for detecting the spatial extension of sources. We then test all sources in the second Fermi-LAT catalog (2FGL) for extension. We report the detection of seven new spatially extended sources.
%U http://arxiv.org/abs/1207.0027v2