University Of Tasmania

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Interstellar scintillation, ISS, and intrinsic variability of radio AGN

journal contribution
posted on 2023-05-21, 12:48 authored by Jauncey, DL, Koay, JY, Bignall, HE, Macquart, JP, Pursimo, T, Giroletti, M, Hovatta, T, Kiehlmann, S, Rickett, BJ, Readhead, A, Max-Moerbeck, W, Vedantham, H, Reynolds, C, James LovellJames Lovell, Ojha, R, Kedziora-Chudczer, L

We investigate the relationship between the 5 GHz interstellar scintillation (ISS) and the 15 GHz intrinsic variability of the compact, radio-selected active galactic nuclei (AGN) common to the Microarcsecond Scintillation-Induced Variability (MASIV) Survey and the Owens Valley Radio Observatory blazar flux density monitoring program. As part of this investigation, we also re-examine the reported intrinsic nature of the February 1990 VLA observations of the blazar S5 0716+714. We are also examining the presence of IDV/ISS in the Owens Valley 15 GHz flux density monitoring data. We find a significant relationship between the Owens Valley 15 GHz modulation index and the MASIV modulation index. We also discuss the implications of these findings for RadioAstron. (C) 2019 Published by Elsevier Ltd on behalf of COSPAR.


Publication title

Advances in Space Research








School of Natural Sciences


Elsevier Ltd

Place of publication

United Kingdom

Rights statement

Copyright 2019 Published by Elsevier Ltd on behalf of COSPAR.

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences