SIMBAD references

We present the optical and infrared identifications of the 266 radio sources detected at 20 cm with the Very Large Array in the Chandra Deep Field-South. Using deep i-band Advanced Camera for Surveys, R-band Wide Field Imager, K-band SOFI NTT, K-band ISAAC VLT and Spitzer imaging data, we are able to find reliable counterparts for 254 (∼95%) VLA sources. Twelve radio sources remain unidentified, and three of them are ``empty fields.'' Using literature and our own data we are able to assign redshifts to 186 (∼70%) radio sources: 108 are spectroscopic redshifts and 78 are reliable photometric redshifts. Based on the rest-frame colors and morphological distributions of the host galaxies, we find evidences for a change in the submillijansky radio source population: (1) above ~0.08 mJy early-type galaxies are dominating and (2) at flux densities below ~0.08 mJy, starburst galaxies become dominant.