News & Events

Humans of ASTRON: Carin Lubbers-Leering

In Humans of ASTRON we share stories about the people at ASTRON. Carin Lubbers-Leering is HR assistant at ASTRON and has been working with us since 2000.

Humans of ASTRON: Lesley Goudbeek

In Humans of ASTRON we share stories about the people at ASTRON. Lesley Goudbeek has been design engineer at ASTRON since 2013.

Humans of ASTRON: Harish Vedantham

In Humans of ASTRON we share stories about the people at ASTRON. In this episode we interview Dr. Harish Vedantham, junior scientist and working at ASTRON since 2018.

Cosmic flashes come in all different sizes

On May 24, four European telescopes took part in the global effort to understand mysterious cosmic flashes. The telescopes captured flashes of radio waves from an extreme, magnetised star in our galaxy.

Data release from the first year of the Apertif imaging surveys

The Apertif imaging team has released science data from the first year of science operations of WSRT-Apertif as the Apertif Data Release 1 (DR1). Now the entire astronomical community can access the data collected by Apertif in its first year of observing, which started on 1 July 2019.

First direct detection of a brown dwarf with a radio telescope

Astronomers at ASTRON  have discovered a brown dwarf with LOFAR. The discovery of the object dubbed Elegast, opens up a new path that uses radio telescopes to discover faint objects that are close-cousins of Jupiter-like exoplanets.

Events

Mon 17 May 2021 - Thu 20 May 2021

Applied RF technology course

The RF course is an excellent introduction for Digital / Analog engineers who are or will be involved in the development of RF systems.

Daily Image

Colloquium: High-resolution study with interstellar lenses

© CC-BY-SA-NC credit: Dongzi Li

Radio waves propagating in space are often scattered into multiple paths by the ionized interstellar medium. It has long been realized that the scattering screens could be used as “interstellar lenses” to study the source and the interstellar plasma.

Compared to the telescopes on Earth, interstellar lenses could be of much larger sizes, ranging from solar radius to AUs, which could result in high angular resolution and sensitivity. Moreover, the interstellar lenses sometimes have the advantage of placement. For example, for sources with a close companion, the interstellar lenses formed in the companion wind could be only a few solar radii away from the source -- the proximity provides better resolution than studying the Sun with telescopes on Earth.

Despite the great advantages of the interstellar lenses, the uncertainty on the lensing structures restricts applications to extremely simple sources, such as the point-like, coherent sources: pulsars, and potentially FRBs.

In this talk, I will discuss applications of interstellar lensing. In particular, I will discuss the ability to constraining the pulsar emission region and measuring the Doppler factor of the emitting particles. I will also talk about the lenses' sensitivity to constrain the magneto-environment of the lensing material.

Latest tweets

An international team of astronomers has produced a map of the sky at ultra-low radio frequencies using LOFAR, revealing more than 25,000 active supermassive black holes in distant galaxies. http://bit.ly/3awD9Yg

An international team of astronomers has produced a map of the sky at ultra-low radio frequencies using @LOFAR, revealing more than 25,000 active supermassive black holes in distant galaxies. http://bit.ly/3awD9Yg

Happy #WomenInScience day! This is Paula Fusiara, one of our colleagues and a design engineer, whose dream it is to engineer telescopes! 📡🤩 https://youtu.be/MtKMRpVAxYg
#PeopleofAstron

A historical day for radio astronomy today! The SKA Observatory is born! We are so looking forward to this new era in radio astronomy!📡🤩📡🥳 http://bit.ly/3aqWTLC

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