The CIDA-UCM-Yale shallow survey for emission line galaxies

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We are especially grateful to CIDA colleagues who have participated in different discussions about topics directly involved in this paper. Special thanks to the night assistants O. Contreras, F. Moreno, R. Rojas and U. Sánchez and the professional observers L. Romero and D. Herrera of the Venezuelan National Astronomical Observatory for their constant effort. We also acknowledge the useful suggestions from an anonymous referee. The alternative calculation of the LF(Hα) using an extintion correction estimated from a correlation between MB and E(B − V ) is included in the referee’s recommendations. The observations reported in this paper were done under the Scientific and Academic Collaboration Agreement signed between the Universidad Complutense de Madrid (UCM), España, and the Centro de Investigaciones de Astronomía “Francisco J. Duarte” (CIDA), Venezuela, in force since 1996 until end of 1999. Funding for the Sloan Digital Sky Survey (SDSS) has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Aeronautics and Space Administration, the National Science Foundation, the U.S. Department of Energy, the Japanese Monbukagakusho, and the Max Planck Society. The SDSS Web site is http://www.sdss.org/. The SDSS is managed by the Astrophysical Research Consortium (ARC) for the Participating Institutions. The Participating Institutions are The University of Chicago, Fermilab, the Institute for Advanced Study, the Japan Participation Group, The Johns Hopkins University, Los Alamos National Laboratory, the MaxPlanck-Institute for Astronomy (MPIA), the Max-PlanckInstitute for Astrophysics (MPA), New Mexico State University, University of Pittsburgh, Princeton University, the United States Naval Observatory, and the University of Washington. A.B. acknowledges R. Guzmán (University of Florida, USA), A. Parravano (Universidad de Los Andes, Venezuela), M. Bautista (Instituto Venezolano de Investigaciones Científicas), M. Bessega (Universidad Central de Venezuela), J. Bergamaschi (Observatorio Cagigal, Caracas), who provided useful advice on the analysis of survey results. A.B. also acknowledges financial support from the Fondo Nacional de Ciencia, Tecnología e Innovación, Ministerio de Ciencia y Tecnología, Venezuela.