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Colloquium: Imaging with FARSIDE: A Radio Telescope on the Lunar Farside
© CC-BY-SA-NC (credit: Blue Origin, Nivedita Mahesh) The Farside Array for Radio Science Investigations of the Dark ages and Exoplanets (FARSIDE) is a NASA Probe-class concept to place a low-frequency...
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Colloquium: Masers and Dense molecular gases in active galactic nuclei
© Yoshiaki Hagiwara Extragalactic H2O masers have been found in dense gas regions in active galactic nuclei (AGN) and they are known to be a powerful tool for tracing a disc, outflow, or some other...
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Full subband correlator test for a LOFAR2 Station
© ASTRON The subband correlator in a LOFAR2 Station will cross correlate subband data between 192 antenna signal inputs (all LBA or all HBA), to measure the array correlation matrix (ACM) for 192x192...
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Renewed Melkwegpad completed
© RTV Drenthe On June 22nd the renewed âMelkwegpadâ (Milky Way Path) was completed. Jorrit Siebenga and Sjouke Kuindersma placed the last few new signs for this path in Westerbork. For the occasion...
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How ARTS Finds FRBs - I: Innovative Hierarchical Beamforming
© vL The Apertif Radio Transient System (ARTS) is a supercomputing instrument that performed real-time detection and localisation of Fast Radio Bursts on Apertif at Westerbork. In a series of images we...
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Visualizing RFI with AARTFAAC
© Bharat Kumar Gehlot Identification and excision of Radio Frequency Interference (RFI) is a critical hurdle in experiments that seek to measure the 21-cm signature of neutral hydrogen from the Cosmic...
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Looking inside the accretion disc around a supermassive black hole
© WAB H2O MegaMaser emission in sources such as the prominent NGC 4258 arise from a thin gas disc surrounding the supermassive nucleus. Space Very Long Baseline Interferometry (SVLBI) experiments with...
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Looking inside the accretion disc around a supermassive black hole
© WAB H2O MegaMaser emission in sources such as the prominent NGC 4258 arise from a thin gas disc surrounding the supermassive nucleus. Space Very Long Baseline Interferometry (SVLBI) experiments with...
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Colloquium: The complex process to protect radio astronomy from harmful...
© Gyula Jozsa Colloquium - The complex process to protect radio astronomy from harmful interferencesIn spectrum management, we participate in the regulatory processes that can be used to protect radio...
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Strong RFI source found nextdoor
© - When testing new receivers at the antenna field, several RFI sources were found and eliminated. One of the sources took days to spot. The interfering signal consisted of spikes spaced 125kHz apart,...
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WSRT at dawn
© Lute van de Bult While cyling through the woods thinking about optical fibers, LNA's and what more for the upgrade of a MFFE for RT0, I hear ravens, see hares and roe deer.And at the end of this...
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ASTRON livens up exhibition of Nebra sky disc
© Lisanne Bötger Last week, the Drents Museum opened their exhibition of the Nebra sky disc. This first realistic representation of the night sky, dating from around 1750 BC, was discovered in Nebra...
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Summer Student Project: HI gas in the heart of 3C 84
© Claire Cook The accretion of gas onto a central supermassive black hole can transform a quiet galactic center into one of the most energetic phenomena in the Universeâan Active Galactic Nucleus...
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Forecasting Solar Energetic Particles (SEPs) by combining SXR and low...
© Liam Clarke Solar flares are bursts of light from solar active regions, visible at virtually every wavelength. Particle acceleration from flares can produce measurable increases in energetic (10keV...
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Absolute calibration of an LBA dipole
© Cristina-Maria Cordun DISTURB is a soon-to-be-built interferometer that will monitor the Sun between 3 MHz and 3 GHz and give warnings when the solar activity exceeds a specific threshold. This...
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Going home
© Eric Muires Taken one late night on the way home. The spirit of this summer is more than academia, and these small moments to remind us that there is more to an internship than just working, make it...
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A field trip for the summer students
© Gemma Janssen Every year, some non-research experiences are part of the ASTRON/JIVE summerstudent programme. The traditional Wadloop-event has taken part, Giethoorn has been visited, the...
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Perseids 2022
© CC-BY 4.0 Tammo Jan Dijkema The maximum of the Perseids meteor shower 2022 is scheduled for the night of 12-13 August. The full Moon will interfere with optical observing a bit this night. Luckily,...
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Saturn near opposition
© Rik ter Horst Saturn remains a marvelous object, even seen through a modest telescope. This image was captured on the 8th of August with a 250 mm F/15 Schmidt-Cassegrain and a ASI178MC camera from my...
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The anisotropy of the diffuse radio background
© F J Cowie Widefield LOFAR HBA observations of a 16 degree patch of sky centered on the North Celestial Pole were used to measure the diffuse radio background. On the left a cleaned image of the...
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