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An Apparent Jump in the Radio Position of J1147+3501

Created 17/10/2025

Updated 17/10/2025

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The fundamental celestial reference frame is realized by observations of extragalactic radio sources using the technique of very long baseline interferometry (VLBI). Compact radio-emitting active galactic nuclei are regularly used as reference points for relative positioning of other radio sources. VLBI absolute astrometric data indicate that the nucleus of the nearby radio galaxy J1147+3501 apparently changed its position by about 0farcs02 some time between 1999 and 2017. We suggest that this unusually large displacement is a consequence of a drastic change in the source brightness distribution as revealed by archival high-resolution VLBI images. Citation: Titov, O., & Frey, S. (2020). An apparent jump in the radio position of J1147+3501. Research Notes of the AAS, 4(7), 108. https://doi.org/10.3847/2515-5172/aba42c

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Field Value
Title An Apparent Jump in the Radio Position of J1147+3501
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/05fc368c-002b-4ced-a5b3-0bd7daa9cddf
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        -180.0,
        -90.0
      ],
      [
        180.0,
        -90.0
      ],
      [
        180.0,
        90.0
      ],
      [
        -180.0,
        90.0
      ],
      [
        -180.0,
        -90.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "An Apparent Jump in the Radio Position of J1147+3501". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/an-apparent-jump-in-the-radio-position-of-j11473501