High resolution interferometry of the QSO 1422+202
Centre for Imaging Technologies, Halmstad University, S-301 18 Halmstad, Sweden
2 Istituto di Radioastronomia del C.N.R., Via P. Gobetti, I-40129 Bologna, Italy
Send offprint request to: F. Mantovani
Accepted: 29 January 1997
We present VLA A-array observations at 8.4 and 15 GHz and European VLBI Network (EVN) observations at 1.6 GHz of the radio source 1422+202. It is suggested that 1422+202 is a Medium-size Object in the evolutionary sequence from Compact Steep-spectrum Sources to larger sized radio sources. The VLBI data were analysed with the phase referencing technique and we show that the EVN can work as a phase stable instrument for separations between the calibrator source and the target source up to ∼ 10°. With the VLA and VLBI observations we investigate some of the issues about the nucleus of 1422+202 and we discuss the possible cause for the low frequency variability detected while monitoring the source.
Key words: galaxies: jets / quasars: QSO 1422+202 / radio continuum: galaxies
© European Southern Observatory (ESO), 1997