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

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

2004-08-03

arxiv.org/abs/astro-ph/0408045v1

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1111/j.1365-2966.2004.08264.x

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.

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