Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2009-12-18
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
3 pages, 3 ps figures, "2009 Fermi Symposium", "eConf Proceedings C091122"
Scientific paper
Blazars are a small fraction of all extragalactic sources but, unlike other objects, they are strong emitters across the entire electromagnetic spectrum. Recent data in the microwave region of the electromagnetic spectrum have become available to allow for systematic studies of blazars over large cosmological volumes. This frequency band is indeed particularly suited for the selection of blazars since at these frequencies the contamination from radio extended components with steep spectra is no longer present and the emission from the accretion process is negligible. During the first 3 months of scientific operations Fermi-LAT detected 106 bright, high-galactic latitude (| b |> 10 deg) AGNs with high significance. In this study we investigate the possible relations between the microwave and the gamma-ray emissions for Fermi-LAT detected AGNs belonging to WMAP 5th year bright source catalog.
Cavazzuti Elisabetta
Colafrancesco Sergio
collaboration Fermi-LAT
Gasparrini Dario
Giommi Paolo
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