8 papers
Tied-array beam flatfielding
Dirk Kuiper, Cees Bassa, Ziggy Pleunis +1
Context. Multi-element phased-array radio telescopes use digital beamforming to widen their field-of-view with numerous tied-array beams (TABs). These beams share bandpass variatio…
Pulsars identified in the LOFAR Two-metre Sky Survey at 144 MHz
G. A. C. Rijkers, C. G. Bassa, J. R. Callingham +1
We present the astrometric identification of 80 known radio pulsars as unresolved continuum sources detected at 144 MHz in the second data release of the LOFAR Two-metre Sky Survey…
Sporadic radio pulses from a white dwarf binary at the orbital period
I. de Ruiter, K. M. Rajwade, C. G. Bassa +14
Recent observations have revealed rare, previously unknown flashes of cosmic radio waves lasting from milliseconds to minutes, and with periodicity of minutes to an hour. These tra…
Strongly polarised radio pulses from a new white-dwarf-hosting long-period transient
Sanne Bloot, Harish K. Vedantham, Cees G. Bassa +6
Long-period transients (LPTs) are a new and enigmatic class of objects that produce bright pulsations in the radio, with periods far exceeding those seen in rotationally powered pu…
The Crab Nebula at subarcsecond resolution with the International LOFAR Telescope
M. Arias, R. Timmerman, F. Sweijen +2
We present International LOw Frequency ARray (LOFAR) Telescope (ILT) observations of the Crab Nebula, the remnant of a core-collapse supernova explosion observed by astronomers in…
Broadband Polarized Radio Emission Detected from Starlink Satellites Below 100 MHz with NenuFAR
X. Zhang, P. Zarka, C. Viou +16
This study evaluates the impact of Starlink satellites on low-frequency radio astronomy below 100 MHz, focusing on challenges on data processing and scientific goals. We conducted…