Daily Image
10-01-2008
Sources from the DEVOS survey
| Submitter: | Zsolt Paragi |
| 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. |
| Tweet |  |