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Extragalactic megahertz-peaked spectrum radio sources at milliarcsecond scales
© NA Pictured are the powerful radio jets of an active galactic nucleus (AGN) which were launched from a supermassive black hole approximately 3 billion light years away. The pictured AGN is...
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A Mechanical Workshop milestone
© ASTRON Mechanical Department 3 weeks ago, the day finally arrived on which we got to meet our new 4800kg steel friend. After months of preparations, in the early morning of Thursday the 11th of July...
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MAMMOET: A hobby that got out of hand
© René Kaptijn Besides being a Project Manager at ASTRON I have a hobby: Over the past years, I have played as a volunteer in several open-air theatre performances. Last spring, I was invited to...
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Stellar systems at low radio frequencies: possible exoplanet hosts?
© Ivey Davis, Harish Vedantham, Joe Callingham, Tim Shimwell Stars are not bright radio emitters. An exceptional class of âflareâ stars and some stars in close binaries are known to emit radio...
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HI imaging of candidate Local Group dwarf galaxies
© Lilly Bralts-Kelly, Betsey Adams Cosmological simulations predict the existence of more low-mass dark matter halos than there are observed dwarf galaxies. This discrepancy is generally attributed to...
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Milky way and radio telescope
© no copyright This is a photo of the Dwingeloo radio telescope and the Milky Way taken at midnight of 2019 July 24. It's my first time to see the Milky Way with my naked eye. It was a cozy night,...
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The Inner Jet of the Blazar OJ287
© John Hunter, Dhanya Nair Most galaxies are thought to host supermassive black holes in their centers, of which approximately 10% are classified as active galactic nuclei (AGN). These AGN differ from...
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HI in Fornax with MeerKAT
© INAF/SARAO MeerKAT commissioning observations have resulted in the detection of two previously unknown extended tails of HI in the Fornax cluster around NGC 1316. The data were taken as part of...
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Comparing LOFAR Epoch of Reionization target fields using 21-cm power spectra
© The LOFAR EoR team One of the most important epochs in our understanding of the Universe is the Epoch of Reionization (EoR) that is predicted to have happened around 500 million years after the Big...
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A man in a logarithmic scale: Nikolai Kardashev, 1932â2019
© Photo: Astro Space Center of P.N. Lebedev Physical Institute, Russia Academy of Sciences Astronomers are no strangers to very large and very small numbers. For professional life within the framework...
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Constraining coherent low frequency radio flares from compact binary mergers
© A. Rowlinson This figure is from Rowlinson & Anderson (2019, MNRAS Accepted) which explores the potential of detecting coherent radio emission from compact binary mergers. The diagram shows an...
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Employing AARTFAAC as an ionospheric instrument
© Arianna Saba, Maaijke Mevius AARTFAAC, the Amsterdam-ASTRON Radio Transient Facility And Analysis Centre, is an all-sky monitor based on the low band antennas of LOFAR, thus operating between 30 and...
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Latvian LOFAR station LV614 passed the Site Acceptance Test!
© Photos: Henri Meulman, Klaas Stuurwold On Thursday 15 th of August 2019, this important milestone in the realization of the Latvian LOFAR station in Irbene, near Ventspils was reached. Witnessed by...
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Constraining Inclinations of Black Widow Pulsars
© CC-by-SA Pulsar signals are affected by the presence of turbulent magneto-ionic material along the line of sight as they travel from the pulsar to the Earth. This means the âpulsarâ signal is...
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Maser astrometry in CASA
© Sophia Vaughan The Milky Way is only one of millions upon millions of galaxies in the universe, but it does have one unique property; it is the only galaxy which is observed from within. This does...
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Summary of 2nd ASTRON/JIVE Traineeship in Science Operations with Massive Arrays
© Copyright 2019 Sumit Jaiswal and Thomas Franzen. All Rights Reserved. The second edition of the ASTRON/JIVE "Traineeship in Science Operations with Massive Arrays" ended on 26 July 2019. The aim of...
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Netherlands first country to ratify SKA Observatory Convention
© SKA Organisation The Square Kilometre Array (SKA) Observatory, the intergovernmental organisation that will build and operate the radio telescope, has taken an important step forward thanks to the...
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Pulsars as tools to study turbulence in the interstellar medium
© M. A. Krishnakumar and Yogesh Maan Pulsed radio signals from pulsars get affected by the ionized interstellar medium (IISM) in a variety of ways. One such effect is broadening of an intrinsically...
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Data compression aided AI for LOFAR system health management
© ASTRON LOFAR system health management (SHM) is charged with detecting and identifying system errors. LOFAR produces more than a thousand spectrogram plots for each observation and itâs not easy to...
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Correcting for Direction-dependent Effects in LOFAR Data with Screens
© CC-by-SA Correcting for Direction-dependent Effects in LOFAR Data with ScreensLOFAR data suffer from direction-dependent effects (from the ionosphere and beam) that must be solved and corrected for...
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