Sloan digital sky survey quasars in the Spitzer Wide-Area Infrared Extragalactic Survey (SWIRE) ELAIS N1 Field: properties and spectral energy distributions

Hatziminaoglou, E.; Pérez-Fournon, I.; Polletta, M.; Afonso-Luis, A.; Hernán-Caballero, A.; Montenegro-Montes, F. M.; Lonsdale, C.; Xu, C. K.; Franceschini, A.; Rowan-Robinson, M.; Babbedge, T.; Smith, H. E.; Surace, J.; Shupe, D.; Fang, F.; Farrah, D.; Oliver, S.; González-Solares, E. A. and Serjeant, S. (2005). Sloan digital sky survey quasars in the Spitzer Wide-Area Infrared Extragalactic Survey (SWIRE) ELAIS N1 Field: properties and spectral energy distributions. Astronomical Journal, 129(3) pp. 1198–1211.

DOI: https://doi.org/10.1086/428003

Abstract

We present a mid-infrared (MIR) analysis of 35 quasars with spectroscopic redshifts selected from the Spitzer Wide-Area Infrared Extragalactic Survey (SWIRE). We discuss their optical and MIR colors and show that these quasars occupy well-defined regions in MIR color-color space. We examine the issue of type 1 active galactic nuclei candidate selection in detail and propose new selection methods based on MIR colors. The available multiband data allow us to construct two new, well-sampled quasar templates, covering wavelengths from the ultraviolet to the MIR.

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