The new year begins with good news for the Astronomical Observatory.
Andrea Tarchi and Paola Castangia, researchers at the Astronomical Observatory of Cagliari in the field of extragalactic radio astronomy, are among the authors of the article (“The 1.4 GHz radio properties of hard X-ray selected AGN“, Panessa et al. 2015) from which the Picture of the Month (POM, in the figure) of INTEGRAL, one of the European Space Agency’s X-ray astronomy satellites, was taken.
In the article, the authors show that they have found a significant correlation between the X-ray and radio wave luminosities of Active Galactic Nuclei (AGN) that are part of the AGN sample observed by INTEGRAL. For the comparison, they used radio data from two “surveys” – essentially “all-sky” observations – one conducted in America (NRAO VLA Sky Survey, NVSS) and the other in Australia (Sydney University Molonglo Sky Survey, SUMSS).
Interestingly, the opening POM of 2015 comes three years after another “Christmas” POM obtained at the end of 2011 by the same authors (Tarchi et al. 2011).
Congratulations to Andrea, Paola, and their collaborators for their work and the recognition they received!
Read the news in English on the European Space Agency’s website. The INTEGRAL POM archive is available here.