The NTT SUSI deep field
Abstract
We present a deep BVrI multicolor catalog of galaxies in a 5.62 sq.arcmin field 80 arcsec south of the high redshift (z=4.7) quasar BR 1202-0725, derived from observations with the direct CCD camera SUSI at the ESO NTT. The formal 5sigma magnitude limits (in 2x 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 ~ 3 times higher, with ~ 20% of the objects with V-I>3.0. Reliable colors have been measured for galaxies selected down to r=26. The choice of the optical filters has been optimized to define a robust multicolor selection of galaxies at 3.8<= z<= 4.4. Within this interval the surface density of galaxy candidates with r < 26 in this field is 2.7+/- 0.4 arcmin(-2) corresponding to a comoving density of Star Formation Rate at 3.8<= z<= 4.4 of 10(-2.00) - 10(-1.82) h(3) Msun * yr(-1) * Mpc(-3) . Based on observations collected at the NTT 3.5m of ESO, Chile
The catalog is available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.letml- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 1999
- DOI:
- 10.48550/arXiv.astro-ph/9810135
- arXiv:
- arXiv:astro-ph/9810135
- Bibcode:
- 1999A&A...341..641A
- Keywords:
-
- GALAXY: STELLAR CONTENT;
- GALAXIES: EVOLUTION;
- COSMOLOGY: OBSERVATIONS;
- COSMOLOGY: LARGE-SCALE STRUCTURE OF UNIVERSE;
- Astrophysics
- E-Print:
- 13 pages, 9 figures, 3 tables (uses aa.cls). Accepted for publication in Astronomy &