A Public Redshift Catalogue of the Chandra Deep Field South from COMBO-17

Abstract

We have imaged the Chandra Deep Field South (CDFS) among other fields for the COMBO-17 survey. We used the Wild Field Imager at the MPG/ESO-2.2-m telescope at La Silla, Chile, to observe 17 passbands from 350 to 930 nm (UBVRI plus 12 medium-bands). Such a photometric dataset allows quite reliable multi-colour classification and accurate photometric redshift estimation. The resulting object catalogue for the CDFS contains ~ 100 QSOs, ~ 1000 stars and ~ 10000 galaxies at R < 24. A further 50000 objects fainter than that are included in the catalogue, but have much less reliable redshifts. This catalogue was drawn from a deep R-band image with R_{lim, 5σ} = 26.0 and 0.75^″ coadded PSF. It covers an area of 31.5^′ × 30^′ centered on α₂₀₀₀ = 03^h 32^m 25^s and δ₂₀₀₀ = –27° 48^′ 50^″.