|Description:|| The Deep Extragalactic VLBI-Optical Survey (DEVOS) aims at constructing a sample of compact radio sources up to two orders of magnitude fainter than those usually studied with VLBI. Recent 5-GHz phase-referencing observations with the EVN targeted 26 radio sources around two compact calibrators. Optical identifications were ensured by selecting objects from the Sloan Digital Sky Survey (SDSS).|
An efficient way to identify potential VLBI targets with mas-scale compact radio structures at >1 mJy flux density level was found. Nearly 90% of the sources that are unresolved both in SDSS (i.e. optical quasars) and in the VLA Faint Images of the Radio Sky at Twenty-centimeters (FIRST) survey (<5", >20 mJy) have been successfully detected with the EVN. Images of four such quasars in a wide range of redshifts are shown here as an example.
For more information see:
Frey S., Gurvits L.I., Paragi Z., Mosoni L., Garrett M.A., Garrington S.T. (2008), A&A 477, 781
|Copyright:||Frey et al.|