Pan-STARRS1 variability of XMM-COSMOS AGN
Pan-STARRS1 variability of XMM-COSMOS AGN
Aims. Upcoming large area sky surveys like Euclid and eROSITA, which are dedicated to studying the role of dark energy in the expansion history of the Universe and the three-dimensional mass distribution of matter, crucially depend on accurate photometric redshifts. The identification of variable sources, such as active galactic nuclei …