Survey for emission-line galaxies: Universidad Complutense de Madrid list 3
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1999
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University Chicago Press
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Abstract
A new low-dispersion objective-prism search for low-redshift (z<0.045) emission-line galaxies (ELGs) has been carried out by the Universidad Complutense de Madrid using the Schmidt Telescope at the Calar-Alto Observatory. This is a continuation of the UCM Survey, which was performed by visual selection of candidates in photographic plates via the presence of the Hα+[N II] λ6584 blend in emission. In making this new list we have applied an automatic procedure, fully developed by us, for selecting and analyzing ELG candidates on the digitized images obtained with the Machine Automatique à Mesurer pour l'Astronomie (MAMA). The analyzed region of the sky covers 189 deg^2 in nine fields near α=14^h and 17^h, δ=25 ºC. The final sample contains 113 candidates. Special effort has been made to obtain a large amount of information directly from our uncalibrated plates by using several external calibrations. The parameters obtained for the ELG candidates allow us to study the statistical properties of the sample.
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© 1999. American Astonomical Society.
We would like to gratefully acknowledge the inestimable observation support received from the Calar Alto Observatory staff, specially from Kurt Birkle. We also express our thanks to Jean Guibert and the MAMA staff for their friendly assistance and warm hospitality. We would like to thank Armando Gil de Paz, Javier Cenarro, and Nicolás Cardiel for their helpful comments and valuable suggestions. We would also like to thank Marion Schmitz from the NED catalog and Heinz Andernach from Guanajuato University for their help in the revision of Table 2, and the anonymous referee for his useful suggestions and comments that improved this paper. This work has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, Caltech, under contract to the National Aeronautics and Space Administration. This research was supported in part by the Spanish Programa Sectorial de Promoción General del Conocimiento under grants PB96-0645, and PB96-0610.