By Wim van Cappellen

LOFAR uses two types of antennas. Each type listens to different wavelengths of the radio spectrum. Different wavelengths provide complementary information about the Universe and its constituents.

Published by the editorial team, 15 June 2020

Currently, LOFAR can use only one type of antenna at the same time. In 2022 the digital brains of LOFAR are upgraded to simultaneously observe with both types of antennas. New pioneering astrophysical research will be possible using the absolute lowest radio frequencies visible from Earth. With this new system, the northern sky can be surveyed > 100x more sensitive and at > 5x higher-resolution compared to any previous or planned survey at these exceptionally long wavelengths.

The two types of antennas LOFAR uses, Low Band Antenna (LBA), left and High Band Antenna (HBA), right. Credit: ASTRON

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On June 13-17, the LOFAR Family Meeting took place in Cologne. After two years LOFAR researchers could finally meet in person again. The meeting brings together LOFAR users and researchers to share new scientific results.
https://www.astron.nl/dailyimage/main.php?date=20220621

Our renewed ‘Melkwegpad’ (Milky Way Path) is finished! The new signs have texts in Dutch on the one side and in English on the other side. The signs concerning planets have a small, 3D printed model of that planet in their centre.
https://www.astron.nl/dailyimage/
#Melkwegpad @RTVDrenthe

Daily image of the week

The background drawing shows how the subband correlator calculates the array correlation matrix. In the upper left the 4 UniBoard2s we used. The two ACM plots in the picture show that the phase differences of the visibilities vary from 0 to 360 degrees.

Daily image of the week: Testing with the Dwingeloo Test Station (DTS)
One of the key specifications of LOFAR2.0 is measuring using the low- and the highband antenna at the same time. For this measurement we used 9 lowband antenna and 3 HBA tiles.
https://www.astron.nl/dailyimage/main.php?date=20220607

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