Measurement of the spatial distribution of neutral hydrogen via the redshifted 21-cm line
promises to revolutionize our knowledge of the epoch of reionization and the first galaxies …

LOFAR, the LOw-Frequency ARray, is a new-generation radio interferometer constructed in
the north of the Netherlands and across europe. Utilizing a novel phased-array design …

GLEAM, the GaLactic and Extragalactic All-sky MWA survey, is a survey of the entire radio
sky south of declination+ 25° at frequencies between 72 and 231 MHz, made with the MWA …

The hot plasma within merging galaxy clusters is predicted to be filled with shocks and
turbulence that may convert part of their kinetic energy into relativistic electrons and …

The largely unexplored decametre radio band (10–30 MHz) provides a unique window for
studying a range of astronomical topics, such as auroral emission from exoplanets …

Context. The Low Frequency Array (LOFAR) is the only existing radio interferometer able to
observe at ultra-low frequencies (< 100 MHz) with high resolution (< 15") and high sensitivity …

The LOFAR Two-metre Sky Survey (LoTSS) will cover the full northern sky and, additionally,
aims to observe the LoTSS deep fields to a noise level of≲ 10 μJy beam− 1 over several …

We present parametrized broad-band spectral models valid at frequencies between 30 and
300 MHz for six bright radio sources selected from the 3C survey, spread in right ascension …

Calibration of radio interferometric observations becomes increasingly difficult towards lower
frequencies. Below∼ 300 MHz, spatially variant refractions and propagation delays of radio …

Abstract 21 cm epoch of reionization (EoR) observations promise to transform our
understanding of galaxy formation, but these observations are impossible without …