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1 Msec Chandra Deep Field South survey



Chandra Deep Field South (CDFS) is one of the deepest hard X-ray surveys (Giacconi et al. 2001). Depending on the absolute background flux level accepted, 70-100% is resolved into discrete sources -- 5070% in the hard band. In total 349 Chandra sources have been detected in the in the 942 ks exposure of the CDFS. Using the FORS1/FORS2 spectrographs at the VLT telescopes spectroscopic redshifts were obtained for 168 X-ray sources, of which 137 have both reliable optical identification and redshift estimate (including 16 external identifications). The R<24 observed sample comprises 161 X-ray objects (181 optical counterparts) and 126 of them have unambiguous spectroscopic identification (Szokoly et al. 2004). Population synthesis models predicted a peak around z~1.4. Contrary to these predictions the distribution peaks at lower redshifts, around 0.7. The expected large number of high redshift (5 and beyond) QSOs are not found.

Fig 1: Left: Chandra ACIS-I colour image of the Chandra Deep Field South, where the red, green, and blue colours correspond to the 0.1-1 keV, 1-3 keV, and 3-7 keV energy bands, respectively. Right: XMM-Newton PN and MOS colour image of the same region. The red, green, and blue colours refer to the 0.5-2 keV, 2-4.5 keV, and 4.5-10 keV energy bands. The field sizes are about 20 x 20 arcmin and 30 x 30 arcmin, respectively.   ( external linkCDFS web site)

The main characteristics of the CDFS are:

  • One of the two deepest Chandra fields
  • Deep ACS imaging from GOODs
  • Pencil-beam survey (0.08 square degree)
  • A wealth of multi-wavelength data

Papers from this work:

  • The Chandra Deep Field South: Optical Spectroscopy I.,
    Szokoly, G., Bergeron, J., Hasinger, G., Lehmann, I., Kewley, L., Mainieri, V., Nonino, M., Rosati, P., Giacconi, R., Gilli, R., Gilmozzi, R., Norman, C., Romaniello, M., Schreier, E., Tozzi, P., Wang, J.X., Zheng, W., Zirm, A.,
    2005, ApJS, in press
  • Sub-mm detection of a high redshift type 2 QSO,
    Mainieri, V., Rigopoulou, D., Lehmann, I., Scott, S., Matute, I., Almaini, O., Tozzi, P., Hasinger, G., Dunlop, J.S.,
    2005, MNRAS, in press
  • Photometric Redshift of X-Ray Sources in the Chandra Deep Field-South,
    Zheng, W., Mikles, V. J., Mainieri, V., Hasinger, G., Rosati, P., Wolf, C., Norman, C., Szokoly, G., Gilli, R., Tozzi, P., Zirm, A., Giacconi, R.,
    2004, ApJS, 155, 73
  • A catalogue of the Chandra Deep Field South with multi-colour classification and photometric redshifts from COMBO-17,
    Wolf, C., Meisenheimer, K., Kleinheinrich, M., Borch, A., Dye, S., Gray, M., Wisotzki, L., Bell, E. F., Rix, H.-W., Cimatti, A., Hasinger, G., Szokoly, G.,
    2004, A&A, 421, 913
  • Hubble Space Telescope Imaging in the Chandra Deep Field-South. III. Quantitative Morphology of the 1 Million Second Chandra Counterparts and Comparison with the Field Population,
    Grogin, N.A., Koekemoer, A.M., Schreier, E.J., Bergeron, J., Giacconi, R., Hasinger, G., Kewley, L., Norman, C., Rosati, P., Tozzi, P., Zirm, A., 2003, ApJ, 595, 685<
  • Tracing the Large-Scale Structure in the Chandra Deep Field South,
    Gilli, R., Cimatti, A., Daddi, E., Hasinger, G., Rosati, P., Szokoly, G., Tozzi, P., Bergeron, J., Borgani, S., Giacconi, R., Kewley, L., Mainieri, V., Mignoli, M., Nonino, M., Norman, C., Wang, J., Zamorani, G., Zheng, W., Zirm, A.,
    2003, ApJ, 592, 721
  • A Classic Type 2 QSO,
    Norman, C., Hasinger, G., Giacconi, R., Gilli, R., Kewley, L., Nonino, M., Rosati, P., Szokoly, G., Tozzi, P., Wang, J., Zheng, W., Zirm, A., Bergeron, J., Gilmozzi, R., Grogin, N., Koekemoer, A., Schreier, E.,
    2002, ApJ, 571, 218


(Original author: Ingo Lehmann, Date: 10/11/2004)

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Last update: 2010-02-02 by   linkH. Steinle
Contact person:   linkM. Brusa   and   linkN. Cappelluti
 
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