Articles by Jun Yi Koay

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Jun Yi Koay

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Ordered magnetic fields around the 3C 84 central black hole

1 February 2024 by Georgios Filippos Paraschos and others

High Energy Astrophysical Phenomena, Astrophysics of Galaxies

Metadata for the Flux Density Calibration of the April 2018 Event Horizon Telescope Data

6 December 2023 by Jun Koay and others

Instrumentation and Methods for Astrophysics

Absolute Flux Density Calibration of the Greenland Telescope Data for Event Horizon Telescope Observations

5 December 2023 by Jun Koay and others

Instrumentation and Methods for Astrophysics

A search for pulsars around Sgr A* in the first Event Horizon Telescope dataset

29 August 2023 by Pablo Torne and others

High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics

Milliarcsecond Core Size Dependence of the Radio Variability of Blazars

21 August 2023 by Po Chih Hsu and others

Astrophysics of Galaxies, High Energy Astrophysical Phenomena

The Greenland Telescope: Construction, Commissioning, and Operations in Pituffik

19 July 2023 by Ming-Tang Chen and others at

National Radio Astronomy Observatory

Instrumentation and Methods for Astrophysics

A ring-like accretion structure in M87 connecting its black hole and jet

26 April 2023 by Ru-Sen Lu and others

High Energy Astrophysical Phenomena, Astrophysics of Galaxies

Comparison of Polarized Radiative Transfer Codes used by the EHT Collaboration

21 March 2023 by Ben Prather and others at

LANL

High Energy Astrophysical Phenomena

Flares in the changing look AGN Mrk 590. I: The UV response to X-ray outbursts suggests a more complex reprocessing geometry than a standard disk

3 January 2023 by Daniel Lawther and others

High Energy Astrophysical Phenomena, Astrophysics of Galaxies

The Photon Ring in M87*

18 August 2022 by Avery Broderick and others

High Energy Astrophysical Phenomena

Unravelling the Innermost Jet Structure of OJ 287 with the First GMVA+ALMA Observations

1 May 2022 by Guang-Yao Zhao and others

High Energy Astrophysical Phenomena, Astrophysics of Galaxies

Event Horizon Telescope observations of the jet launching and collimation in Centaurus A

5 November 2021 by Michael Janssen and others

Astrophysics of Galaxies, Cosmology and Nongalactic Astrophysics

The Variability of the Black-Hole Image in M87 at the Dynamical Time Scale

2 November 2021 by Kaushik Satapathy and others

High Energy Astrophysical Phenomena

The Polarized Image of a Synchrotron Emitting Ring of Gas Orbiting a Black Hole

13 May 2021 by Ramesh Narayan and others at

ASTRON

High Energy Astrophysical Phenomena

A parsec-scale faint jet in the nearby changing-look Seyfert galaxy Mrk 590

12 January 2021 by Jiazhang Yang and others

High Energy Astrophysical Phenomena, Astrophysics of Galaxies

Gravitational Test Beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole

2 October 2020 by Dimitrios Psaltis and others at

ASTRON

General Relativity and Quantum Cosmology, High Energy Astrophysical Phenomena

The presence of interstellar scintillation in the 15 GHz interday variability of 1158 OVRO-monitored blazars

4 September 2019 by Jun Koay and others

Astrophysics of Galaxies, High Energy Astrophysical Phenomena

Detection statistics of the RadioAstron AGN survey

2 September 2019 by Y. Kovalev and others

Astrophysics of Galaxies, High Energy Astrophysical Phenomena

MUSE observations of a changing-look AGN I: The re-appearance of the broad emission lines

26 March 2019 by S. Raimundo and others at

ASIAA

Astrophysics of Galaxies

The MASIV Survey IV: relationship between intra-day scintillation and intrinsic variability of radio AGNs

22 November 2017 by Jun Koay and others

Astrophysics of Galaxies, High Energy Astrophysical Phenomena

Parsec-scale radio morphology and variability of a changing-look AGN: the case of Mrk 590

21 April 2016 by Jun Koay and others

Astrophysics of Galaxies

ALMA Probes the Molecular Gas Reservoirs in the Changing-Look Seyfert Galaxy Mrk 590

23 October 2015 by Jun Koay and others

Astrophysics of Galaxies

Time domain studies of Active Galactic Nuclei with the Square Kilometre Array

19 January 2015 by Hayley Bignall and others

High Energy Astrophysical Phenomena, Astrophysics of Galaxies

Scatter broadening of compact radio sources by the ionized intergalactic medium: Prospects for detection with Space VLBI and the SKA

28 October 2014 by Jun Koay and J. -P. Macquart

Cosmology and Nongalactic Astrophysics, High Energy Astrophysical Phenomena

The Micro-Arcsecond Scintillation-Induced Variability (MASIV) Survey III. Optical Identifications and New Redshifts

14 February 2013 by Tapio Pursimo and others

Cosmology and Nongalactic Astrophysics

Why Do Compact Active Galactic Nuclei at High Redshift Scintillate Less?

22 June 2012 by Jun Koay and others

Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies

Detection of Six Rapidly Scintillating AGNs and the Diminished Variability of J1819+3845

9 September 2011 by Jun Koay and others

Astrophysics of Galaxies, Cosmology and Nongalactic Astrophysics

Dual-Frequency Observations of 140 Compact, Flat-Spectrum Active Galactic Nuclei for Scintillation-Induced Variability

12 July 2011 by Jun Koay and others

Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies

The Commensal Real-time ASKAP Fast Transients (CRAFT) survey

18 January 2010 by Jean-Pierre Macquart and others

High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics

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High Energy Astrophysical Phenomena Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology