Germany's eROSITA Second Data Release Unveils Nearly Two Million X-ray Sources
On July 31, the German eROSITA consortium, led by the Max Planck Institute for Extraterrestrial Physics with participation from the University of Bonn, released its second major public dataset, eROSITA Data Release 2 (DR2). Built from the first three all-sky survey observations conducted by the eROSITA telescope aboard the Spectrum-Roentgen-Gamma (SRG) mission, this dataset is considered one of the most sensitive and comprehensive X-ray catalogs currently available to the public. The DR2 main catalog covers the 0.2–2.3 kiloelectron-volt (keV) band in the western hemisphere, containing nearly two million X-ray sources. Among these, over 1.9 million are point-like sources, primarily consisting of stars and actively accreting supermassive black holes; approximately 64,000 are extended sources,...
2026-08-01
