期刊
ASTRONOMICAL JOURNAL
卷 129, 期 3, 页码 1198-1211出版社
IOP PUBLISHING LTD
DOI: 10.1086/428003
关键词
galaxies : active; infrared : general; quasars : general
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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