High resolution interferometry of the QSO 1422+202

Details High resolution interferometry of the QSO 1422+202 High resolution interferometry of the QSO 1422+202

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26as..125..453b&link_type=abstract

A & A Supplement series, Vol. 125, November I 1997, 453-458.

Astronomy and Astrophysics

Astronomy

Galaxies: Jets, Quasars: Qso 1422+202, Radio Continuum: Galaxies

Scientific paper

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 degrees. 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.

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