A study of the 15 micron quasars in the ELAIS N1 and N2 fields

Abstract

This paper discusses properties of the European Large Area ISO Survey 15 micron quasars and tries to establish a robust method of quasar selection for future use within the Spitzer Wide-Area Infrared Extragalactic Survey (SWIRE) framework. The importance of good quality ground-based optical data is stressed, both for the candidates selection and for the photometric redshifts estimates. Colour-colour plots and template fitting are used for these purposes. The properties of the 15 micron quasars sample are studied, including variability and black hole masses and compared to the properties of other quasars that lie within the same fields but have no mid-infrared counterparts. The two subsamples do not present substantial differences and are believed to come from the same parent population.

11 pages; 24 figures (3 figures replaced by b/w low resolution ones), accepted for publication in MNRAS

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Cited by in corpus (5)

• Photometric redshifts in the SWIRE Survey
• Luminosity functions for galaxies and quasars in the Spitzer Wide-Area Infrared Extra-galactic (SWIRE) Legacy survey
• Spectral energy distributions and luminosities of galaxies and AGN in the SPITZER SWIRE Legacy Survey
• Mid-infrared spectroscopy of infrared-luminous galaxies at z~0.5-3
• FIRBACK IV: Towards the nature of the 170microns source population