Work

Imaging of quasars and active galactic nuclei. Fine-scale structure evolution

Year: 2007

Type: conference-paper

Abstract: We present partial results of four survey experiments carried out with the VLBA.All the observations were made between April and August 1999.There were at least two reasons for our interest in these data.Firstly, a number of the sources have already been included into the "Radioastron" scientific programme source list as well as into the VSOP scientific programme source list.The second reason is that these are dual-frequency observations as all the sources were observed at two frequency bands: S-band (2200 MHz) and X-band (8400 MHz), simultaneously.The influence of the Earth's troposphere as well as the influence of the ionosphere could be calibrated and compensated thanks to this frequency structure of observational data.The results of application of the new algorithm of such a compensation are demonstrated.Moreover, changes of some sources' fine structure during four months are shown.

Source: European VLBI Network Symposium and Users Meeting (EVN Symposium)

DOI: 10.22323/1.036.0015

Authors: Andrey Chuprikov, I. Guirin

Institutions: P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Russian Academy of Sciences, Astro Space Center

Language: English

Topic: Radio Astronomy Observations and Technology

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: Goddard Space Flight Center

OpenAlex ID: W106918344

FWCI:

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