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The MASIV legacy: surveying AGN intra-day variability at radio wavelengths


Koay, JY and Macquart, J-P and Rickett, BJ and Bignall, HE and Jauncey, DL and Pursimo, T and Reynolds, C and Lovell, JEJ and Kedziora-Chudczer, L and Ojha, R, The MASIV legacy: surveying AGN intra-day variability at radio wavelengths, Proceedings of the International Astronomical Union: Symposium 304 - Multiwavelength AGN Surveys and Studies, 7-11 October 2013, Yerevan, Armenia, pp. 415-417. ISSN 1743-9213 (2014) [Refereed Conference Paper]

Copyright Statement

Copyright 2014 International Astronomical Union

DOI: doi:10.1017/S1743921314004463


The Micro-arcsecond Scintillation-Induced Variability (MASIV) Survey and its followup observations have provided large datasets of AGN intra-day variability (IDV) at radio wavelengths. These data have shown that IDV arises mainly from scintillation caused by scattering in the ionized interstellar medium (ISM) of our Galaxy, based on correlation with Galactic latitudes and line-of-sight Galactic electron column densities. The sensitivity of interstellar scintillation (ISS) towards source angular sizes has provided a new tool for studying the most compact components of radio-loud AGNs at microarcsecond (μas) scale resolution - much higher than any ground-based radio interferometer. We present here key results from the MASIV Survey and its follow-up observations, and point to relevant papers where these results have been published.

Item Details

Item Type:Refereed Conference Paper
Keywords:galaxies: active, radio continuum: ISM, scattering
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Cosmology and extragalactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Lovell, JEJ (Dr Jim Lovell)
ID Code:98501
Year Published:2014
Deposited By:Mathematics and Physics
Deposited On:2015-02-18
Last Modified:2017-11-03

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