| Issue |
A&A
Volume 436, Number 2, June III 2005
|
|
|---|---|---|
| Page(s) | L13 - L16 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361:200500112 | |
| Published online | 30 May 2005 | |
Letter to the Editor
High-resolution radio imaging of the most distant radio quasar SDSS J0836+0054
1
FÖMI Satellite Geodetic Observatory, PO Box 585, 1592 Budapest, Hungary e-mail: frey@sgo.fomi.hu
2
Joint Institute for VLBI in Europe, Postbus 2, 7990 AA Dwingeloo, The Netherlands e-mail: [zparagi;lgurvits]@jive.nl
3
Konkoly Observatory of the Hungarian Academy of Sciences, PO Box 67, 1525 Budapest, Hungary e-mail: mosoni@konkoly.hu
Received:
11
March
2005
Accepted:
19
April
2005
We observed SDSS J0836+0054, the most distant radio-loud quasar known at present (
) with the European Very Long Baseline Interferometry (VLBI) Network at the 5 GHz frequency on 2003 November 4. The source is compact at the milli-arcsecond (mas) angular scale with a flux density of 0.34 mJy. The observations with the Very Large Array (VLA) made on the consecutive day support a conclusion that the radio emission from SDSS J0836+0054 is essentially confined within the central 40 pc. Based on our phase-referenced VLBI observation, we obtained the astrometric position of the source accurate to ~2 mas.
Key words: techniques: interferometric / radio continuum: galaxies / galaxies: active / cosmology: observations / quasars: individual: SDSS J0836+0054 / quasars: individual: J0836+0052
© ESO, 2005
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