Astron. Astrophys. Suppl. Ser. 140, 351-353

A survey of UV-excess AGNs in the South Galactic Pole

A sample for the analysis of the QSO clustering

F. La Franca¹ - C. Lissandrini² - S. Cristiani^2,3 - L. Miller⁴ - M.R.S. Hawkins⁵ - H.T. McGillivray⁵

Send offprint request: F. La Franca

Correspondence to: lafranca@fis.uniroma3.it

1 - Dipartimento di Fisica, Università degli studi Roma Tre, Via della Vasca Navale 84, I-00146 Roma, Italy
2 - Dipartimento di Astronomia, Università di Padova, Vicolo dell'Oservatorio 5, I-35122, Padova, Italy
3 - Space Telescope-European Coordinating Facility, European Southern Observatory, Karl-Schwarzschild Str. 2, D-85748 Garching b. München, Germany
4 - Department of Physics, Nuclear and Astrophysics Laboratory, Keble Road, Oxford OX1 3RH, UK
5 - Royal Observatory of Edinburgh, Blackford Hill, Edinburgh EH9 3HJ, UK

Received July 8; accepted September 27, 1999

Abstract:

Spectra, position, magnitudes and colors are presented for 485 faint ( $B_{\rm J}<20.5$) emission line objects selected with the ultraviolet-excess (UVX) criterion on a area of 24.6 deg² in the South Galactic Pole. The objects were selected from the analysis of pixel-to-pixel stacking of COSMOS scans of UKST U J and Rplates. The candidates were observed with the Meudon-ESO Fiber Optics System (MEFOS) at the ESO 3.6 m telescope. 429 type 1 AGNs have been identified (373 in the redshift range $0.3<z\leq2.2$). This sample has allowed the measure of a difference on the QSO clustering evolution in comparison with that found for galaxies (La Franca et al. 1998). The region is part of the ESO Imaging Survey (EIS) and of the 2dF QSO redshift survey.

Key words: catalogs -- surveys -- quasars: general