Interstellar scintillation, ISS, and intrinsic variability of radio AGN

David L. Jauncey; Jun Yi Koay; Hayley Bignall; Jean-Pierre Macquart; Tapio Pursimo; Marcello Giroletti; Talvikki Hovatta; Sebastian Kiehlmann; Barney Rickett; Anthony Readhead; Walter Max-Moerbeck; Harish Vedantham; Cormac Reynolds; James Lovell; Roopesh Ojha; Lucyna Kedziora-Chudczer

doi:10.1016/j.asr.2019.05.003

Interstellar scintillation, ISS, and intrinsic variability of radio AGN

David L. Jauncey^*
, Jun Yi Koay
, Hayley Bignall
, Jean-Pierre Macquart
, Tapio Pursimo
, Marcello Giroletti
, Talvikki Hovatta
, Sebastian Kiehlmann
, Barney Rickett
, Anthony Readhead
, Walter Max-Moerbeck
, Harish Vedantham
, Cormac Reynolds
, James Lovell
, Roopesh Ojha
, Lucyna Kedziora-Chudczer

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

6 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	756-762
Number of pages	7
Journal	Advances in space research
Volume	65
Issue number	2
DOIs	https://doi.org/10.1016/j.asr.2019.05.003
Publication status	Published - 15-Jan-2020
Externally published	Yes

Keywords

Active galactic nuclei
Radio continuum: Quasars
Variability
Interstellar scintillation
RAPID VARIABILITY
INTRADAY VARIABILITY
FLUX-DENSITY
SCATTERING

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Interstellar scintillation, ISS, and intrinsic variability of radio AGN
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Jauncey, D. L., Koay, J. Y., Bignall, H., Macquart, J.-P., Pursimo, T., Giroletti, M., Hovatta, T., Kiehlmann, S., Rickett, B., Readhead, A., Max-Moerbeck, W., Vedantham, H., Reynolds, C., Lovell, J., Ojha, R., & Kedziora-Chudczer, L. (2020). Interstellar scintillation, ISS, and intrinsic variability of radio AGN. Advances in space research, 65(2), 756-762. https://doi.org/10.1016/j.asr.2019.05.003

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title = "Interstellar scintillation, ISS, and intrinsic variability of radio AGN",

abstract = "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.",

keywords = "Active galactic nuclei, Radio continuum: Quasars, Variability, Interstellar scintillation, RAPID VARIABILITY, INTRADAY VARIABILITY, FLUX-DENSITY, SCATTERING",

author = "Jauncey, \{David L.\} and Koay, \{Jun Yi\} and Hayley Bignall and Jean-Pierre Macquart and Tapio Pursimo and Marcello Giroletti and Talvikki Hovatta and Sebastian Kiehlmann and Barney Rickett and Anthony Readhead and Walter Max-Moerbeck and Harish Vedantham and Cormac Reynolds and James Lovell and Roopesh Ojha and Lucyna Kedziora-Chudczer",

year = "2020",

month = jan,

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doi = "10.1016/j.asr.2019.05.003",

language = "English",

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Jauncey, DL, Koay, JY, Bignall, H, Macquart, J-P, Pursimo, T, Giroletti, M, Hovatta, T, Kiehlmann, S, Rickett, B, Readhead, A, Max-Moerbeck, W, Vedantham, H, Reynolds, C, Lovell, J, Ojha, R & Kedziora-Chudczer, L 2020, 'Interstellar scintillation, ISS, and intrinsic variability of radio AGN', Advances in space research, vol. 65, no. 2, pp. 756-762. https://doi.org/10.1016/j.asr.2019.05.003

TY - JOUR

T1 - Interstellar scintillation, ISS, and intrinsic variability of radio AGN

AU - Jauncey, David L.

AU - Koay, Jun Yi

AU - Bignall, Hayley

AU - Macquart, Jean-Pierre

AU - Pursimo, Tapio

AU - Giroletti, Marcello

AU - Hovatta, Talvikki

AU - Kiehlmann, Sebastian

AU - Rickett, Barney

AU - Readhead, Anthony

AU - Max-Moerbeck, Walter

AU - Vedantham, Harish

AU - Reynolds, Cormac

AU - Lovell, James

AU - Ojha, Roopesh

AU - Kedziora-Chudczer, Lucyna

PY - 2020/1/15

Y1 - 2020/1/15

N2 - 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.

AB - 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.

KW - Active galactic nuclei

KW - Radio continuum: Quasars

KW - Variability

KW - Interstellar scintillation

KW - RAPID VARIABILITY

KW - INTRADAY VARIABILITY

KW - FLUX-DENSITY

KW - SCATTERING

U2 - 10.1016/j.asr.2019.05.003

DO - 10.1016/j.asr.2019.05.003

M3 - Article

SN - 0273-1177

VL - 65

SP - 756

EP - 762

JO - Advances in space research

JF - Advances in space research

IS - 2

ER -

Interstellar scintillation, ISS, and intrinsic variability of radio AGN

Abstract

Keywords

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