Survey for emission-line galaxies:: Universidad Complutense de Madrid list 3

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 H alpha + [N II] lambda 6584 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 a Mesurer pour l'Astronomie (MAMA). The analyzed region of the sky covers 189 deg(2) in nine fields near alpha = 14(h) and 17(h), delta = 25 degrees. 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.