Deep extragalactic VLBI-optical survey (DEVOS): First results

L. Mosoni, S. Frey, L. I. Gurvits, M. A. Garrett, S. T. Garrington, Z. Tsvetanov

Research output: Contribution to journalArticle


Until recently, VLBI surveys of extragalactic radio sources were limited to total flux densities of ∼100 mJy. We present early results of pilot observations of the Deep Extragalactic VLBI-Optical Survey aimed at improving this limit by at least an order of magnitude. Based on our pilot observations we estimate that a sample of ∼104 faint compact extragalactic sources can now be surveyed on milliarcsecond scales at cm wavelengths. A large fraction of the sample will be optically identified by the Sloan Digital Sky Survey (SDSS). There will be a number of possibilities to use such a large sample, including the study of the cosmological evolution of the population of mJy-level extragalactic radio sources, cosmological tests and astrometric applications.

Original languageEnglish
Pages (from-to)343-346
Number of pages4
JournalBaltic Astronomy
Issue number3
Publication statusPublished - 1 Dec 2005



  • Astrometry
  • Cosmology: observations
  • Quasars: general
  • Techniques: interferometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Mosoni, L., Frey, S., Gurvits, L. I., Garrett, M. A., Garrington, S. T., & Tsvetanov, Z. (2005). Deep extragalactic VLBI-optical survey (DEVOS): First results. Baltic Astronomy, 14(3), 343-346.