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Colloquium 14 May 2020: Samayra Straal (NYU Abu Dhabi) - Pulsar wind nebulae...
© Samayra Straal Pulsar wind nebulae (PWNe) are created by the interaction between the highly relativistic winds from pulsars and their surroundings. When young, the PWN resides in the remnant produced...
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Where are we now? Celebrating John Romein 25 year at ASTRON/NWO
© ASTRON A man with a mission, always focused at investigating the latest, newest, and most powerful electronic systems. Not just from a scientific perspective, but aimed at applying it in our newest...
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Virtual Observatory meets virtually.
© CC0 Twice a year, the International Virtual Observatory Alliance (IVOA) gathers somewhere in the world for the IVOA interoperability workshop1. The goal of those meetings is to bring together the...
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AIPS++, a Necessary Project
© Darrell Schiebel For a brutally concise summary of the saga of the AIPS++ Project, click here. The above picture was taken at the Grand Project Review at the NRAO HQ in Charlottesville (USA) in Dec...
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3d point cloud of the LOFAR core
© CC-BY-4.0 Tammo Jan Dijkema The Actueel Hoogtebestand Nederland is a digital elevation model of The Netherlands. The model is released as open data. The model is produced with laser altimetry. The...
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Single pulse modeling and the bi-drifting subpulses
© ASTRON Today we present a daily image with one of the highest information densities ever; but you can also just enjoy the shapes and colors. These figures describe our observations and modelling of a...
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Colloquium: Active galactic nuclei in the multi-messenger era
© Bindu Rani (KASI & NASA-GSFC) Abstract: Feeding on the surrounding gas at the centers of active galactic nuclei (AGN), supermassive black holes often produce collimated outflows, known as...
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LOFAR on OpenStreetMap
© CC-BY-2.0 OpenStreetMap Contributors LOFAR is now on OpenStreetMap! While many stations were already on there, I added some 30 stations that were not. Also, I added the HBA geometry, so that the HBA...
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Colloquium 4 June 2020: Florent Mertens (University of Groningen)
© Florent Mertens The challenges of observing the Epoch of Reionization and Cosmic DawnAbstract: Low-frequency observations of the redshifted 21cm line promise to open a new window onto the first...
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METIS Instrument Passes PDR!
© The images along with the text are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and...
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WSRT-Apertif Surveys to continue throughout 2021
© ASTRON The large-scale Apertif surveys with the Westerbork Synthesis Radio Telescope (WSRT) that started on 1 July 2019 will continue to be supported during 2021. Apertif (Aperture Tile In Focus), a...
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Colloquium 11 June 2020: Bradley Frank (University of Cape Town)
© Ian Heywood & Bradley Frank MIGHTEE-HI: Early Science and ProcessingAbstract: MIGHTEE is a 20 sq. deg. survey that will be done with the MeerKAT radio telescope. At L-band, we expect to reach a...
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Open source in action: ASTRON gateware FFT ported to CASPER
© Daniel van der Schuur CASPER (The Collaboration for Astronomy Signal Processing and Electronics Research) has been promoting the use of open source FPGA hardware, software and tools for 14 years....
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3d-printing metal with Binder 3D
© Mechanical department Last week we paid a visit to Westerbork-based mechanical engineering and manufacturing company GeTech. However known for their design, manufacturing and measurement of check...
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Deep Learning Assisted Data Inspection for Radio Astronomy
© Mesarcik et al. 2020 (MNRAS in press: https://doi.org/10.1093/mnras/staa1412) Modern radio telescopes combine thousands of receivers, long-distance networks, large-scale compute hardware, and...
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A new leap in RFI mitigation
© Sarod Yatawatta Terrestrial radio telescopes are always affected by radio frequency interference (RFI). It is rather straight-forward to detect and mitigate strong RFI that stand well above the...
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A 3D printed RFI enclosure
© Niels Rietdijk & ASTRON Radio Frequency Interference is a recurring subject at almost every project within ASTRON. Many competence groups within ASTRON have tricks up their sleeve to mitigate...
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Virtual tour of the Dwingeloo Telescope
© CC-BY-4.0 Tammo Jan Dijkema Due to COVID-19, public tours of the Dwingeloo Telescope are unfortunately canceled: the room is simply too small to host more than a few people.As an alternative, I made...
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LOFAR EoR plenary
© - Last week, the LOFAR Epoch of Reionization (EoR) plenary meeting was held to discuss the latest LOFAR EoR analyses. Both the observational strategy and results were discussed, as well as what those...
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The beautiful mess in Abell 2255
© Copyright © 2020 Andrea Botteon, accepted for publication in ApJ, https://arxiv.org/abs/2006.04808 Radio halos are giant diffuse synchrotron emission found at the center of some merging galaxy...
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