Issue |
Astron. Astrophys. Suppl. Ser.
Volume 140, Number 3, December II 1999
|
|
---|---|---|
Page(s) | 351 - 353 | |
DOI | https://doi.org/10.1051/aas:1999523 | |
Published online | 15 December 1999 |
A survey of UV-excess AGNs in the South Galactic Pole *
A sample for the analysis of the QSO clustering
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
Corresponding author: Send offprint request to: F. La Francalafranca@fis.uniroma3.it
Received:
8
July
1999
Accepted:
27
September
1999
Spectra, position, magnitudes and colors are presented for 485 faint () 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
). 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
Based on material collected with the UK Schmidt Telescope, with the ESO-La Silla Telescopes and on COSMOS scans. Table 3 is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html and Fig. 1 is only available in the online version of the journal at http://aas.aanda.org
© European Southern Observatory (ESO), 1999