Free access
Issue
Astron. Astrophys. Suppl. Ser.
Volume 140, Number 3, December II 1999
Page(s) 351 - 353
DOI http://dx.doi.org/10.1051/aas:1999523
DOI: 10.1051/aas:1999523

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. Cristiani2,3 - 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 R plates. 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

SIMBAD Objects

Copyright The European Southern Observatory (ESO)