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The MASIV survey: spectroscopic identifications of compact radio sources

Published online by Cambridge University Press:  25 July 2014

T. Pursimo ,
R. Ojha ,
D. Jauncey ,
J. Lovell ,
M. Dutka ,
H. Bignall ,
J.-P. Macquart ,
B. Rickett ,
L. Kedziora-Chudczer  and
J. Y. Koay
T. Pursimo
Affiliation:
Nordic Optical Telescope, Spain email: [email protected]
R. Ojha
Affiliation:
ORAU/NASA Goddard Space Flight Center, Astrophysics Science Division, USA
D. Jauncey
Affiliation:
CSIRO Astronomy & Space Science, and Research School of Astronomy and Astrophysics, Australian National University
J. Lovell
Affiliation:
University of Tasmania School of Mathematics & Physics, Australia
M. Dutka
Affiliation:
The Catholic University of America, USA
H. Bignall
Affiliation:
International Centre for Radio Astronomy Research, Curtin University, Australia
J.-P. Macquart
Affiliation:
International Centre for Radio Astronomy Research, Curtin University, Australia
B. Rickett
Affiliation:
Department of Electrical & Computer Engineering, University of California, USA
L. Kedziora-Chudczer
Affiliation:
School of Physics and Astrophysics, University of New South Wales, Australia
J. Y. Koay
Affiliation:
Dark Cosmology Centre, Neils Bohr Institute, University of Copenhagen, Denmark
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Abstract

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Interstellar scintillation (ISS) has been shown to be primarily responsible for the short term intraday variability (IDV) exhibited by extragalactic sources at centimeter wavelengths (e.g. Bignall et al. 2006 and references therein). For a source to scintillate its angular size must be comparable to that of the first Fresnel zone (Narayan 1992) which implies microarcsecond angular sizes for screen distances of tens to hundreds of parsecs. This has the potential to probe within a few light months of the central black hole (Bignall et al. 2006). The aim of the Microarcsecond Scintillation-Induced Variability (MASIV) survey was to provide a catalogue of at least a hundred AGNs that vary on timescales of hours to days to provide the basis of detailed studies of the IDV population drawn from a well-defined sample.

Keywords

galaxies: activedistances and redshiftsphotometry radio continuum: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S304: Multiwavelength AGN Surveys and Studies , October 2013 , pp. 110 - 111
Copyright
Copyright © International Astronomical Union 2014 

References

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