1404+286: A non-ideal calibrator for VLBI observations

Details 1404+286: A non-ideal calibrator for VLBI observations 1404+286: A non-ideal calibrator for VLBI observations

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...281..649z&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 281, no. 3, p. 649-652

Astronomy and Astrophysics

Astronomy

7

Active Galactic Nuclei, Radio Astronomy, Radio Jets (Astronomy), Seyfert Galaxies, Astronomical Maps, Calibrating, Flux Density, Very Long Base Interferometry

Scientific paper

The radio source 1404+286 was observed with global Very Long Baseline Interferometry (VLBI) arrays at 5 and 1.67 GHz in 1990.88 and 1991.45 respectively. High quality maps are presented in this paper, and show the source to be resolved at both frequencies with a core-jet like structure extending approximately 6 mas in position angle approximately -145 deg. The jet direction is similar in both maps. 1404+286 has often been used in the past as a flux density calibrator or a phase referencing source. Our results show that this source is not an ideal calibrator on VLBI scales.

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