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Astron. Astrophys. Suppl. Ser. 133, 171-179

The Marseille Schmidt survey[*] for active star-forming galaxies[*]

I. Data on 92 emission line objects in two fields

C. Surace1,2 - G. Comte2

Send offprint request: C. Surace

1 - Max Planck Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany
2 - Observatoire de Marseille et Institut Gassendi, 2 place Le Verrier, 13248 Marseille, France

Received February 11; accepted June 4, 1998


We present data from a moderately deep spectroscopic Schmidt survey ($B_{\rm lim}$ = 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 $50\,{\rm deg}^2$) 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]$\lambda\lambda 4959,5007$, H$_\beta$ and [OII]$\lambda 3727$ 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.

Key words: surveys -- galaxies: general -- galaxies: starburst -- methods: data analysis

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