This is the first paper in a series aimed at defining a statistically significant sample of QSOs in the range 15 < B < 18.75 and 0.3 < z < 2.2. The selection is carried out using direct plates obtained at the ESO and UK Schmidt Telescopes, scanned with the COSMOS facility and searched for objects with an ultraviolet excess. Follow-up spectroscopy, carried out at ESO La Silla, is used to classify each candidate. In this initial paper, we describe the scientific objectives of the survey; the selection and observing techniques used. We present the first sample of 285 and QSOs (M(B) < -23) in a 153 deg(2) area, covered by the six ''deep'' fields, intended to obtain significant statistics down B similar or equal to 18.75 with unprecedented photometric accuracy. From this database, QSO counts are determined in the magnitude range 17 < B < 18.75.
Cristiani, S., LA FRANCA, F., Andreani, P., Gemmo, A., Goldschmidt, P., Miller, L., et al. (1995). THE ESO KEY-PROGRAM A HOMOGENEOUS BRIGHT QSO SURVEY .1. THE METHODS AND THE DEEP FIELDS. ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 112(2), 347-366.
THE ESO KEY-PROGRAM A HOMOGENEOUS BRIGHT QSO SURVEY .1. THE METHODS AND THE DEEP FIELDS
LA FRANCA, Fabio;
1995-01-01
Abstract
This is the first paper in a series aimed at defining a statistically significant sample of QSOs in the range 15 < B < 18.75 and 0.3 < z < 2.2. The selection is carried out using direct plates obtained at the ESO and UK Schmidt Telescopes, scanned with the COSMOS facility and searched for objects with an ultraviolet excess. Follow-up spectroscopy, carried out at ESO La Silla, is used to classify each candidate. In this initial paper, we describe the scientific objectives of the survey; the selection and observing techniques used. We present the first sample of 285 and QSOs (M(B) < -23) in a 153 deg(2) area, covered by the six ''deep'' fields, intended to obtain significant statistics down B similar or equal to 18.75 with unprecedented photometric accuracy. From this database, QSO counts are determined in the magnitude range 17 < B < 18.75.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
