eROSITA (extended ROentgen Survey with an Imaging Telescope Array) is a wide-field X-ray telescope on-board the Russian-German "Spectrum-Roentgen-Gamma" (SRG) observatory, and it was developed under the leadership of the Max-Planck Institute for extraterrestrial Physics (MPE) in Germany (DE). eROSITA is a sensitive X-ray telescope capable of delivering deep, sharp images over very large areas of the sky in the energy range ~0.2-8 keV. The eROSITA telescope consists of seven identical Wolter-1 mirror modules. Each module contains 54 nested mirror shells in order to meet the required sensitivity. A novel detector system has been developed by MPE on the basis of the successful XMM-Newton pn-CCD technology.
SRG was successfully launched from Baikonur on July 13, 2019 and placed in a halo orbit around the L2 point. From mid-September until mid-December 2019, eROSITA carried out its Calibration and Performance Verification (Cal-PV) program. Since December 2019, SRG/eROSITA has been performing an all-sky survey, in which the whole celestial sphere is mapped once every six months. Eight such all-sky charts are planned until December 2023.
The design-driving science of eROSITA is the detection of very large samples (~100,000 objects) of galaxy clusters out to redshifts z >1, in order to study the large scale structure in the Universe, test and characterize cosmological models including Dark Energy. eROSITA is also expected to yield a sample of several millions Active Galactic Nuclei, including both obscured and un-obscured objects, providing a unique view of the evolution of supermassive black holes within the emerging cosmic structure. The survey will also provide new insights into a wide range of astrophysical phenomena, including accreting binaries, active stars and diffuse emission within the Galaxy, as well as solar system bodies that emit X-rays via the charge exchange process. Finally, such a deep imaging survey at high spectral resolution, with its scanning strategy sensitive to a range of variability timescales from tens of seconds to years, will undoubtedly open up a vast discovery space for the study of rare, unpredicted, or unpredictable high-energy astrophysical phenomena.
This web portal offers general information about the eROSITA instrument, the German eROSITA Consortium (eROSITA-DE), the eROSITA scanning strategy and the released eROSITA data and software.
|Public eROSITA Page||Early Data Release|
|General public: learn about the eROSITA telescope and get the latest news and updates.||The German eROSITA Consortium will make public the observations obtained during the Calibration and Performance Verification (Cal-PV) program. Stay tuned!|
|Future releases||HiPS expoure maps|
|In the near future eROSITA-DE will release the German eROSITA All-Sky Survey (eRASS) data. Learn here the expected dates.||Do you want to learn about the progress of the all-sky survey performed by eROSITA? Access here to the continuously updated exposure maps of the individual surveys.|
|The German eROSITA Consortium has several scientific publications. Access here for getting a complete list of them.||Know the people behind each Science Working Group in the German eROSITA Consortium. Get in touch with them if you would like to collaborate on the project.|
|Learn about the general eROSITA/SRG mission planning. Tools to check past and future survey scanning times are also available.||eROSITA data is stored in units of eROdays (4 hrs). Use this tool to check the corresponding (human-readable) time.|
|This page is only available for members of the German eROSITA Consortium. If you are a member and want to get access, please revise the New Commers section in the main eROSITA Wiki.|