Reddening-Independent Quasar Selection from a Wide-Field Optical and Near-IR Imaging Survey

Details Reddening-Independent Quasar Selection from a Wide-Field Optical and Near-IR Imaging Survey Reddening-Independent Quasar Selection from a Wide-Field Optical and Near-IR Imaging Survey

2002-09-19

arxiv.org/abs/astro-ph/0209398v1

Mon.Not.Roy.Astron.Soc. 337 (2002) 1153

Astronomy and Astrophysics

Astrophysics

11 pages, 14 figures, accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.2002.05961.x

We combine deep, wide-field near-IR and optical imaging to demonstrate a reddening-independent quasar selection technique based on identifying outliers in the (g-z) / (z-H) colour diagram. In three fields covering a total of ~0.7 deg^2 to a depth of m_H~18, we identified 68 quasar candidates. Follow-up spectroscopy for 32 objects from this candidate list confirmed 22 quasars (0.86 65% success rate), a high surface density of candidates, and is relatively independent of reddening. We discuss the implications for star/galaxy separation for IR based surveys for quasars. We provide the coordinate list and follow-up spectroscopy for the sample of 22 confirmed quasars.

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