SIMBAD references

2016ApJS..227....8L - Astrophys. J., Suppl. Ser., 227, 8-8 (2016/November-0)

Interferometric monitoring of gamma-ray bright AGNs. I. The results of single-epoch multifrequency observations.

LEE S.-S., WAJIMA K., ALGABA J.-C., ZHAO G.-Y., HODGSON J.A., KIM D.-W., PARK J., KIM J.-Y., MIYAZAKI A., BYUN D.-Y., KANG S., KIM J.-S., KIM S.-W., KINO M. and TRIPPE S.

Abstract (from CDS):

We present results of single-epoch very long baseline interferometry (VLBI) observations of gamma-ray bright active galactic nuclei (AGNs) using the Korean VLBI Network (KVN) at the 22, 43, 86, and 129 GHz bands, which are part of a KVN key science program, Interferometric Monitoring of Gamma-Ray Bright AGNs. We selected a total of 34 radio-loud AGNs of which 30 sources are gamma-ray bright AGNs with flux densities of >6 x 10–10 ph cm–2 s–1. Single-epoch multifrequency VLBI observations of the target sources were conducted during a 24 hr session on 2013 November 19 and 20. All observed sources were detected and imaged at all frequency bands, with or without a frequency phase transfer technique, which enabled the imaging of 12 faint sources at 129 GHz, except for one source. Many of the target sources are resolved on milliarcsecond scales, yielding a core-jet structure, with the VLBI core dominating the synchrotron emission on a milliarcsecond scale. CLEAN flux densities of the target sources are 0.43-28 Jy, 0.32-21 Jy, 0.18-11 Jy, and 0.35-8.0 Jy in the 22, 43, 86, and 129 GHz bands, respectively. Spectra of the target sources become steeper at higher frequency, with spectral index means of -0.40, -0.62, and -1.00 in the 22-43 GHz, 43-86 GHz and 86-129 GHz bands, respectively, implying that the target sources become optically thin at higher frequencies (e.g., 86-129 GHz).

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: jets - galaxies: nuclei - quasars: general - radio continuum: galaxies - radio continuum: galaxies

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 35

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2020.10.28-21:42:35

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