Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011apj...740l..48m&link_type=abstract
The Astrophysical Journal Letters, Volume 740, Issue 2, article id. L48 (2011).
Astronomy and Astrophysics
Astronomy
7
Galaxies: Active, Bl Lacertae Objects: General, Radiation Mechanisms: Non-Thermal
Scientific paper
Blazars constitute the most interesting and enigmatic class of extragalactic γ-ray sources dominated by non-thermal emission. In this Letter, we show how the Wide Infrared Survey Explorer (WISE) infrared data make it possible to identify a distinct region of the [3.4]-[4.6]-[12] μm color-color diagram where the sources dominated by the thermal radiation are separated from those dominated by non-thermal emission, in particular the blazar population. This infrared non-thermal region, which we indicate as the WISE blazar strip (WBS), will constitute a new powerful diagnostic tool when the full WISE survey data are released. The WBS can be used to extract new blazar candidates, to identify those of uncertain type and also to search for the counterparts of unidentified γ-ray sources. We show one example of the value of the use of the WBS identifying the TeV source VER J0648+152, recently discovered by VERITAS.
Ajello Marco
d'Abrusco Raffaele
Grindlay Jonathon E.
Massaro Francesco
Smith Howard A.
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