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Telescopes

ASTRON is responsible for the operations of the Westerbork Synthesis Radio Telescope (WSRT) and the Low Frequency Array (LOFAR).

Astronomy

The astronomical research at ASTRON is closely aligned with the strengths of our facilities LOFAR and WSRT-APERTIF.

Diversity & Sustainability

ASTRON is committed to achieving a fair, welcoming, and sustainable work environment for all.

Beschermingszones


Met onze radiotelescopen nemen wij de meest zwakke signalen uit het heelal waar. Daardoor zijn zij kwetsbaar voor elektromagnetische storing. Met het tijdig treffen van de juiste maatregelen kan storing worden voorkomen.

Wireless Data Lab


Draadloze techniek lijkt vanzelfsprekend, maar de ontwikkeling ervan gaat niet vanzelf. Daarom hebben we bij ASTRON een proeftuin ingericht; het Wireless Data Lab.

Making discoveries
in radio astronomy
happen.

ASTRON is the Netherlands Institute for Radio Astronomy, and is part of the Institutes organisation of NWO.
STORIES

All sky, all the time – A new radio sky monitor for transients and technosignatures

Breakthrough Listen, headquartered at the University of Oxford – the most ambitious project to date searching for technosignatures (signs of technology as an indicator of extraterrestrial intelligence) – is partnering with ASTRON, the Netherlands Institute for Radio Astronomy, and the University of Manchester, to deploy a new all-sky monitor at the Westerbork Observatory in the Netherlands. The new experiment takes phased array feeds (PAFs) – essentially wide-field radio cameras – that were previously deployed on the Westerbork Synthesis Radio Telescope (WSRT), and installs them on the ground, looking up at the sky directly.

WSRT-APERTIF
Published by the editorial team, 12 May 2025

Sweden and the United Kingdom Join the LOFAR ERIC

Sweden and the United Kingdom have joined the LOFAR ERIC (European Research Infrastructure Consortium) as a member, following the decision of the Council on 26 March 2025. This significant expansion brings the total membership to eight countries, marking an important milestone in the growth of this pioneering research infrastructure.

LOFAR
News
Published by the editorial team, 1 May 2025

ASTRON receives €4.6 million to widen and sharpen LOFAR’s cosmic vision

The Dutch Research Council (NWO) has awarded over €4.6 million to ASTRON, the Netherlands Institute for Radio Astronomy, for a major upgrade to the Low-Frequency Array (LOFAR) radio telescope. The project, called LOFAR Enhanced Network for Sharp Surveys (LENSS), will significantly increase LOFAR’s observational capabilities, enabling astronomers to view four times more of the sky simultaneously while producing images with unprecedented clarity.

LOFAR
News
Published by the editorial team, 28 April 2025

Invisible jets from tiny black holes sculpt the Galaxy

Black holes, even relatively small ones, leave dramatic “footprints” in space that extend far beyond their immediate vicinity—like ripples from a pebble dropped in a pond. New research using the MeerKAT radio telescope reveals that stellar-mass black holes (those formed from collapsed stars) shoot powerful jets of energy creating massive shockwaves, effectively carving out space and influencing their galactic neighbourhoods over thousands of years. The discoveries show smaller black holes play a much more significant role in shaping galaxies than previously thought. These findings are published today in two studies featured in the scientific journal Astronomy & Astrophysics.

Astronomy
News
Published by the editorial team, 25 April 2025
DAILY IMAGE

ESA Concurrent Design Facility study Dark Ages Explorer (DEX)

© Image credit: ATG Europe

In 2021, a team from ESA, ASTRON, Radboud University, University of Groningen, Eindhoven University of Technology, Delft University of Technology and JIVE conducted a concurrent design facility study for a low-frequency radio interferometer located at the far side of the moon. The goal of this instrument is to measure the redshifted 21 cm signal from the Dark Ages and Cosmic Dawn epochs. The results of the study are described in a paper submitted to Experimental Astronomy (see https://arxiv.org/abs/2504.03418). The findings in this paper showed that although the number of antennas needed to achieve the primary scientific goals is not yet feasible at the moment, it points to a path of technological development that can lead to a realistic and valuable experiment in the medium-term future (i.e., the next decade(s)), as well as development of multi-purpose use technology that can be applied on Earth, and towards other lunar operations. The complete report can be found at https://alott.astro.ru.nl/index.php/our-projects/.

The picture shows a precursor antenna system. It is an instrument concept dedicated to study the global neutral hydrogen signal (GloDEX). This concept makes use of technologies that are relevant to DEX as well and consists of multiple spatially isolated foil-based antennas of different design. The measurements of these antennas are to be cross-checked to help separate antenna and instrument response from astrophysical spectral signatures.

ASTRON daily image.
EVENTS

CASPER Workshop 2025

Mon 08 Sep 2025 - Fri 12 Sep 2025

The CASPER workshop is a semi-annual workshop where FPGA, GPU, and general heterogeneous system programmers get together to discuss new instruments in radio astronomy, as well as the tools and libraries for developing and manipulating these instruments.

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