%0 Journal Article %T Search for Spatially Extended Fermi 1 -LAT Sources Using Two 2 Years of Data %+ Institut de recherche en astrophysique et planétologie (IRAP) %+ Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)) %+ Laboratoire Univers et Particules de Montpellier (LUPM) %+ GLAST %A Lande, J. %A Ackermann, Markus %A Allafort, A. %A Ballet, Jean %A Bechtol, K. %A H. Burnett, T. %A Cohen-Tanugi, J. %A Drlica-Wagner, A. %A Funk, S. %A Giordano, F. %A Grondin, M.-H. %A Kerr, M. %A Lemoine-Goumard, M. %< avec comité de lecture %@ 0004-637X %J The Astrophysical Journal %I American Astronomical Society %V 756 %P 5 %8 2012 %D 2012 %Z 1207.0027 %R 10.1088/0004-637X/756/1/5 %K catalogs %K gamma rays: general %K ISM: supernova remnants %K methods: statistical Online-only material: color figures %Z Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE] %Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Journal articles %X Spatial extension is an important characteristic for correctly associating γ-rayemitting 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 %G English %L in2p3-00747331 %U https://hal.in2p3.fr/in2p3-00747331 %~ IN2P3 %~ CEA %~ INSU %~ METEO %~ UNIV-PARIS7 %~ UNIV-TLSE3 %~ CENBG %~ CNRS %~ UNIV-MONTP2 %~ CNES %~ OMP %~ OMP-IRAP %~ LUPM %~ DSM-IRFU %~ IRFU-AIM %~ MIPS %~ UNIV-MONTPELLIER %~ CEA-DRF %~ LUPM_EMA %~ UNIV-PARIS %~ UP-SCIENCES %~ GS-PHYSIQUE %~ UNIV-UT3 %~ UT3-INP %~ UT3-TOULOUSEINP %~ UM1-UM2