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Accession Number
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DE2012-1045803
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Title
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Search for Spatially Extended Fermi-LAT Sources Using Two Years of Data.
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Publication Date
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Jul 2012
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Media Count
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74p
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Personal Author
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A. Allafort A. Drlica-Wagner J. Ballet J. Cohen-Tanugi J. Lande K. Bechtol M. Ackermann T. H. Burnett
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Abstract
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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.
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Keywords
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Detection
Fermi gamma ray space telescope
Gamma ray sources
Monte Carlo method
Pulsars
Simulation
Spectra
Supernova remnants
Wavelengths
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Source Agency
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Technical Information Center Oak Ridge Tennessee
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NTIS Subject Category
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46 - Physics
54C - Astrophysics
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Corporate Author
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Stanford Linear Accelerator Center, CA.
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Document Type
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Technical report
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Title Note
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N/A
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NTIS Issue Number
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1226
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Contract Number
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DE-AC02-76SF00515
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