Fermi large area telescope first source catalog

Authors
Abdo, A. A.; Ackermann, M.; Ajello, M.; Allafort, A.; Antolini, E.; Atwood, W. B.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Baughman, B. M.; Bechtol, K.; Bellazzini, R.; Belli, F.; Berenji, B.; Bisello, D.; Blandford, R. D.; Bloom, E. D.; Bonamente, E.; Bonnell, J.; Borgland, A. W.; Bouvier, A.; Bregeon, J.; Brez, A.; Brigida, M.; Bruel, P.; Burnett, T. H.; Busetto, G.; Cillis, Analia Nilda; The Fermi-LAT Collaboration
Publication Year
2010
Language
English
Format
article
Status
Published version
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 100 MeV to 100 GeV 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.
Fil: Abdo, A. A.. Spece Sciences División. Naval Research Laboratory; Estados Unidos
Fil: Ackermann, M.. University Of Stanford; Estados Unidos
Fil: Ajello, M.. University Of Stanford; Estados Unidos
Fil: Allafort, A.. University Of Stanford; Estados Unidos
Fil: Antolini, E.. Universita degli Studi di Perugia; Italia
Fil: Atwood, W. B.. University of California; Estados Unidos
Fil: Axelsson, M.. Stockholm University; Suecia
Fil: Baldini, L.. Istituto Nazionale di Fisica Nucleare; Italia
Fil: Ballet, J.. Université Paris Diderot - Paris 7; Francia
Fil: Barbiellini, G.. Universita di Trieste; Italia
Fil: Bastieri, D.. Universita Di Padova; Italia
Fil: Baughman, B. M.. Ohio State University; Estados Unidos
Fil: Bechtol, K.. University Of Stanford; Estados Unidos
Fil: Bellazzini, R.. Istituto Nazionale di Fisica Nucleare; Italia
Fil: Belli, F.. Universita di Roma Tor Vergata; Italia
Fil: Berenji, B.. University Of Stanford; Estados Unidos
Fil: Bisello, D.. Universita Di Padova; Italia
Fil: Blandford, R. D.. University Of Stanford; Estados Unidos
Fil: Bloom, E. D.. stanford University; Estados Unidos
Fil: Bonamente, E.. Universita degli Studi di Perugia,; Italia
Fil: Bonnell, J.. National Aeronautics And Space Administration. Goddart Institute For Space Studies; Estados Unidos
Fil: Borgland, A. W.. University Of Stanford; Estados Unidos
Fil: Bouvier, A.. Stanford University; Estados Unidos
Fil: Bregeon, J.. Istituto Nazionale di Fisica Nucleare; Italia
Fil: Brez, A.. Istituto Nazionale di Fisica Nucleare; Italia
Fil: Brigida, M.. Istituto Nazionale di Fisica Nucleare; Italia
Fil: Bruel, P.. Ecole Polytechnique; Francia
Fil: Burnett, T. H.. University of Washington; Estados Unidos
Fil: Busetto, G.. Universita Di Padova; Italia
Fil: Cillis, Analia Nilda. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: The Fermi-LAT Collaboration.
Subject
Catalogs - gamma rays: general
Astronomía
Ciencias Físicas
CIENCIAS NATURALES Y EXACTAS
Access level
Open access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/20461