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The NTT SUSI deep field *
S. Arnouts 1,2,
S. D'Odorico 2,
S. Cristiani 1,
S. Zaggia 2,4,
A. Fontana 3 and
E. Giallongo 3
Received 16 June 1998 / Accepted 4 November 1998
We present a deep BVrI multicolor catalog 1 of galaxies in a 5.62 sq.arcmin field 80 arcsec south of the high redshift () quasar BR 1202-0725, derived from observations with the direct CCD camera SUSI at the ESO NTT. The formal 5 magnitude limits (in FWHM apertures) are 26.9, 26.5, 25.9 and 25.3 in B, V, r and I respectively. Counts, colors for the star and galaxy samples are discussed and a comparison with a deep HST image in the I band is presented. The percentage of merged or blended galaxies in the SUSI data to this magnitude limit is estimated to be not higher than 1%.
At the same galactic latitude of the HDF but pointing toward the galactic center, the star density in this field is found to be times higher, with of the objects with V-I3.0. Reliable colors have been measured for galaxies selected down to . The choice of the optical filters has been optimized to define a robust multicolor selection of galaxies at . Within this interval the surface density of galaxy candidates with in this field is arcmin-2 corresponding to a comoving density of Star Formation Rate at of .
Key words: galaxy: stellar content galaxies: evolution cosmology: observations cosmology: large-scale structure of Universe
Send offprint requests to: S. Arnouts
Online publication: December 16, 1998