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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

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

‘Beyond what we’d hoped’: international telescope in Australia captures first glimpse of the Universe

The first image from the international SKA Observatory’s telescope in Australia, SKA-Low, has been released – a significant milestone in its quest to reveal an unparalleled view of our Universe.

Science
SKA
Published by the editorial team, 17 March 2025

New Technology for Ultra-Fast Data Transfer: SURF and ASTRON Establish 400G Connection

Astronomers Astonished: Enigmatic Distant Radio Bursts Appear to be Neutron Stars

European Pulsar Timing Array Wins Two Prestigious Awards

Roelien Attema named as Netherlands Academy of Engineering Fellow

Using short radio flashes to probe the remnants of neutron star mergers

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DAILY IMAGE

LOFAR2 transient buffer: First dump!

© ASTRON

The LIFT project is about using LOFAR2 to measure radio signals that originate from lightning discharges. During a thunderstorm, all the Uniboard2s in all Dutch LOFAR2 stations will continuously record data from all antennas into DDR4 memory on the UniBoard2s. These memory modules on the UniBoard2 are able to store an amount of 4 seconds of antenna data. When a lighting flash occurs, the recording can be stopped by "freezing" the DDR4 memory content. A user can then select a part (equivalent to a timeslice) of the DDR4 memory content that contains the signal emitted by the lightning flash. The UniBoard2 firmware will then dump that selected part of the antenna data via the network, to be stored or processed by the user.

After several months of effort, we have this chain of events now working for the first time on a real Uniboard2. The photo on the left shows the DDR4 memory chips as they are mounted at the bottom of all UniBoard2s in LOFAR2. The screenshot shown at the right shows the first recording and subsequent dumping of 14 packets of antenna data. The monitor points, shown as well, report that the dumped data has the correct checksum (CRC) and correct timestamp (RSN). We used the test rack in the digital lab for this test.

This test shows that the core functionality of the transient buffer function on UniBoard2 works. This test used one FPGA on a UniBoard2, only. The next implementation step is to dump data from all FPGAs in a LOFAR2 subrack.

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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