VizieR Online Data Catalog: NGC 4565 LOFAR images (Heesen+, 2019)

We present 144-MHz radio continuum maps of NGC 4565 obtained with the Low-frequency ARray (LOFAR) using the high band antennae (HBA). The maps were produced with the facet calibration technique, ensuring direction-dependent calibration, using the FACTOR pipeline. These maps were imaged and deconvolved with the Common Astronomy Software Applications using the multi-frequency-multi-scale CLEAN algorithm. Finally, the maps were convolved in the Astronomical Image Processing System (AIPS) to a circular synthesised beam. In order to measure flux densities, we integrated in ellipses encompassing the 3-sigma contour line.

Low-frequency array (LOFAR), high band antennae (HBA), observed on August 28th and October 12th 2017.

(2 data files).