The Marseille Schmidt survey for active star-forming galaxies

Abstract

We present data from a moderately deep spectroscopic Schmidt survey (B\ₗim = 17.5) of ``active galaxies'' selected by the presence of emission lines in their spectra and/or their UV excess. The redshift, magnitudes, color and diameter reduction methods have been discussed in a previous paper. Here we explain the emission line equivalent width determination method. 92 emission line objects have been found in two adjacent fields (approximately 50 deg(2) ) in the direction of the southern extension of the Virgo cluster. We give a catalog containing positions, photographic R and B magnitudes, U\- \R colors, effective diameters, redshifts, equivalent widths and intensity ratios of the [OIII]\lt~mbda\lt~mbda 4959,5007, H_beta and [OII]\lt~mbda 3727 emission lines. On these fields, we evaluate the completeness limit of the survey at a pseudo B magnitude value of 15.7. A more elaborate astrophysical analysis will appear in a forthcoming paper. The table is also available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html for active star-forming galaxies. Finding charts, including information on star formation location is available in electronic form via http://www.edpsciences.com