The influence of radio-extended structures on offsets between the optical and VLBI positions of sources in the ICRF2

2011/05/03 by J. I. B. Camargo, A. H. Andrei, M. Assafin +2
Engineering · Physics and Astronomy · #Adaptive optics and wavefront sensing #Astronomical Observations and Instrumentation #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Physics #Radio astronomy #Very-long-baseline interferometry #astro-ph.GA

paper · pdf · doi:10.1051/0004-6361/201016201

Accepted on May 3rd 2011 by A&A

arxiv created 2011/05/03 · openalex publication_date 2011/05/17 · arxiv updated 2015/05/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Context. We investigate the differences between positions as determined by optical (direct imaging) and Very Long Baseline Interferometry (VLBI) techniques of extragalactic sources listed in the second realization of the International Celestial Reference Frame (ICRF2).

Citations

• Opacity in compact extragalactic radio sources and its effect on astrophysical and astrometric studies
• The Two Micron All Sky Survey (2MASS)
• The large quasar reference frame (LQRF)
• The Second US Naval Observatory CCD Astrograph Catalog (UCAC2)