Fermi large area telescope first source catalog

We present a catalog of high-energy gamma-ray sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi), during the first 11 months of the science phase of the mission, which began on 2008 August 4. The First Fermi-LAT catalog (...

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Detalles Bibliográficos
Publicado: 2010
Materias:
Catalogs
Gamma rays: general
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00670049_v188_n2_p405_Abdo
http://hdl.handle.net/20.500.12110/paper_00670049_v188_n2_p405_Abdo
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_00670049_v188_n2_p405_Abdo2023-06-08T15:06:15Z Fermi large area telescope first source catalog Catalogs Gamma rays: general We present a catalog of high-energy gamma-ray sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi), during the first 11 months of the science phase of the mission, which began on 2008 August 4. The First Fermi-LAT catalog (1FGL) contains 1451 sources detected and characterized in the 100MeV to 100GeV range. Source detection was based on the average flux over the 11 month period, and the threshold likelihood Test Statistic is 25, corresponding to a significance of just over 4σ. The 1FGL catalog includes source location regions, defined in terms of elliptical fits to the 95% confidence regions and power-law spectral fits as well as flux measurements in five energy bands for each source. In addition, monthly light curves are provided. Using a protocol defined before launch we have tested for several populations of gamma-ray sources among the sources in the catalog. For individual LAT-detected sources we provide firm identifications or plausible associations with sources in other astronomical catalogs. Identifications are based on correlated variability with counterparts at other wavelengths, or on spin or orbital periodicity. For the catalogs and association criteria that we have selected, 630 of the sources are unassociated. Care was taken to characterize the sensitivity of the results to the model of interstellar diffuse gamma-ray emission used to model the bright foreground, with the result that 161 sources at low Galactic latitudes and toward bright local interstellar clouds are flagged as having properties that are strongly dependent on the model or as potentially being due to incorrectly modeled structure in the Galactic diffuse emission. © 2010. The American Astronomical Society. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00670049_v188_n2_p405_Abdo http://hdl.handle.net/20.500.12110/paper_00670049_v188_n2_p405_Abdo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Catalogs
Gamma rays: general
spellingShingle Catalogs
Gamma rays: general
Fermi large area telescope first source catalog
topic_facet Catalogs
Gamma rays: general
description We present a catalog of high-energy gamma-ray sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi), during the first 11 months of the science phase of the mission, which began on 2008 August 4. The First Fermi-LAT catalog (1FGL) contains 1451 sources detected and characterized in the 100MeV to 100GeV range. Source detection was based on the average flux over the 11 month period, and the threshold likelihood Test Statistic is 25, corresponding to a significance of just over 4σ. The 1FGL catalog includes source location regions, defined in terms of elliptical fits to the 95% confidence regions and power-law spectral fits as well as flux measurements in five energy bands for each source. In addition, monthly light curves are provided. Using a protocol defined before launch we have tested for several populations of gamma-ray sources among the sources in the catalog. For individual LAT-detected sources we provide firm identifications or plausible associations with sources in other astronomical catalogs. Identifications are based on correlated variability with counterparts at other wavelengths, or on spin or orbital periodicity. For the catalogs and association criteria that we have selected, 630 of the sources are unassociated. Care was taken to characterize the sensitivity of the results to the model of interstellar diffuse gamma-ray emission used to model the bright foreground, with the result that 161 sources at low Galactic latitudes and toward bright local interstellar clouds are flagged as having properties that are strongly dependent on the model or as potentially being due to incorrectly modeled structure in the Galactic diffuse emission. © 2010. The American Astronomical Society.
title Fermi large area telescope first source catalog
title_short Fermi large area telescope first source catalog
title_full Fermi large area telescope first source catalog
title_fullStr Fermi large area telescope first source catalog
title_full_unstemmed Fermi large area telescope first source catalog
title_sort fermi large area telescope first source catalog
publishDate 2010
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00670049_v188_n2_p405_Abdo
http://hdl.handle.net/20.500.12110/paper_00670049_v188_n2_p405_Abdo
_version_ 1768543696366600192

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