/ftp/cats/aliases/K/./KFM2008_1_



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J/ApJ/698/740            VLA survey of CDF-S. III.                (Tozzi+, 2009)
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Beginning of ReadMe : J/ApJ/698/740 VLA survey of CDF-S. III. (Tozzi+, 2009) ================================================================================ The VLA survey of the Chandra Deep Field-South. III. X-ray spectral properties of radio sources. Tozzi P., Mainieri V., Rosati P., Padovani P., Kellermann K.I., Fomalont E., Miller N., Shaver P., Bergeron J., Brandt W.N., Brusa M., Giacconi R., Hasinger G., Lehmer B.D., Nonino M., Norman C., Silverman J. <Astrophys. J., 698, 740-755 (2009)> =2009ApJ...698..740T ================================================================================ ADC_Keywords: X-ray sources ; Radio continuum ; Cross identifications ; Active gal. nuclei ; Surveys Keywords: cosmology: observations - galaxies: active - galaxies: starburst - radio continuum: galaxies - X-rays: galaxies Abstract: We discuss the X-ray properties of the radio sources detected in a deep 1.4 and 5GHz VLA Radio survey of the Extended Chandra Deep Field-South (E-CDFS). Among the 266 radio sources detected, we find 89 sources (1/3 of the total) with X-ray counterparts in the catalog of the 1Ms exposure of the central 0.08deg^2^ or in the catalog of the 250ks exposure of the 0.3deg^2^ E-CDFS field. For 76 (85%) of these sources, we have spectroscopic or photometric redshifts, and therefore we are able to derive their intrinsic properties from X-ray spectral analysis, namely intrinsic absorption and total X-ray luminosities. We find that the population of submillijansky radio sources with X-ray counterparts is composed of a mix of roughly 1/3 star-forming galaxies and 2/3 active galactic nuclei (AGNs). Description: We observed the whole area of the E-CDFS ( 0.3deg^2^) with the NRAO VLA for 50hr at 1.4GHz mostly in the BnA configuration in 1999 and 2001 February, and for 32hr at 5GHz mostly in the C and CnB configurations in 2001. The effective angular resolution is 3.5". Here we use the radio catalog presented in Paper I (Kellermann et al., 2008, Cat. J/ApJS/179/71). In the E-CDFS area, we have two sets of X-ray data. The first is the 1Ms exposure in the central  0.1deg^2^ (Rosati et al. 2002ApJ...566..667R; Giacconi et al. 2002, Cat. J/ApJS/139/369; Alexander et al. 2003, Cat. J/AJ/126/539), the second one is the shallower  250ks coverage of a square region of 0.28deg^2^ centered on the above field (Lehmer et al. 2005, Cat. J/ApJS/161/21). For the sources identified in the 1Ms exposure of the CDFS, the spectroscopic identification program carried out with the ESO-VLT is presented in Szokoly et al. (2004, Cat. J/ApJS/155/271).