(extended Roentgen Survey with an Imaging Telescope Array)

eROSITA (extended Roentgen Survey with an Imaging Telescope Array) is an X-ray instrument built for the Russian-German mission launched on the Russian Spekt-RG spacecraft on 13 July 2019. The mission will perform the first imaging all-sky survey in the medium energy X-ray range up to 10 keV with 15″-30″ angular resolution, and covers galactic longitudes 180 < l < 360. eROSITA is 25 times more sensitive than ROSAT, which it will effectively replace.

Calibration and Performance Verification Observations were completed in December 2019. The first eROSITA all-sky survey was completed in June 2020, revealing a spectacular vision of the hot and energetic universe. The result has created a new map for astronomers, with this new survey capturing over one million objects – far exceeding the number discovered by previous X-ray telescopes. See more information here.

In 2021, the eROSITA instrument completed its fourth (out of eight) survey of the full sky at X-ray wavelengths. At mission completion, eROSITA will have performed eight all-sky surveys. The existing eROSITA data already surpass those coming from previous all-sky X-ray surveys, having much greater depth, image quality, and spectral coverage. The eROSITA data offer the opportunity to study extremely energetic events across vast scales in the Universe, from accreting binary systems at stellar scales to 10-million-degree shocks driven by galaxy cluster mergers.

eROSITA has been in safe mode since February 2022. To check the status and health of the instrument a technical checkout has been initiated and will be performed over the coming months. The exact duration of the technical checkout will depend on whether any issue is found, considering the relatively long period eROSITA has spent in safe mode.

For more information on the collaboration, email [email protected]

Approved eROSITA_DE PV Observations

  • Merging clusters A3391/3395 (2.5×2.5 deg2 scan; 100ks). Oct 7-8 and Oct 17
  • LMC N132D (Pointed, 48ks). Oct 10
  • NLSy1 1H0707-495 (Pointed; 40ks). Oct 11
  • Isolated NS, PSR B0656+14 (Pointed; 100ks), Oct 15
  • LMC SNR 1987A (Pointed, 80ks). Oct 19
  • Comet-C2018W2 (Pointed 50ks). Oct 24
  • TGUH2213P1 Dark Cloud (Pointed; 56ks), Oct 26
  • eFEDS mini survey (GAMA09; 120 deg2 scan 360ks). Nov 3-7
  • eta Chamaeleontis Star Cluster (5×5 deg2 scan; 150ks). Nov 17-18
  • NGC 7793 P13 ULX (Pointed; 60ks). Nov 19