Chandra deep field south: The optically faint population

V. Mainieri, P. Rosati, M. Nonino, G. Szokoly, J. Bergeron, G. Hasinger, I. Lehmann, P. Tozzi

Research output: Contribution to journalArticle


A not negligible fraction (∼ 15%) of X-ray sources detected in the 1 Msec observation of the Chandra Deep Field South (CDFS) are not detected down to R≃ 27, however they are registered in deep near-IR imaging. We use deep multicolor photometry from the VLT (FORS+ISAAC instruments), covering a broad wavelength range, to discuss the adequacy of such techniques for X-ray selected sources and to constrain the nature of this optically faint population.

Original languageEnglish
Pages (from-to)20-23
Number of pages4
JournalAstronomische Nachrichten
Issue number1-2
Publication statusPublished - Jan 1 2003



  • Galaxies: active
  • Surveys
  • X-rays

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Mainieri, V., Rosati, P., Nonino, M., Szokoly, G., Bergeron, J., Hasinger, G., Lehmann, I., & Tozzi, P. (2003). Chandra deep field south: The optically faint population. Astronomische Nachrichten, 324(1-2), 20-23.