eROSITA Advent Calendar
eROSITA is the primary instrument on-board the Russian-German "Spectrum-Roentgen-Gamma" (SRG) mission, which was successfully launched from Baikonur on July 13, 2019 and placed in a halo orbit around the L2 point. In 2020, eROSITA has perfomed its first all-sky survey (and is close to finishing the second scan).
These are the images for the 2020 advent calender. You'll find 24 highlights from the first year of operation of eROSITA as well as some background information on the telescope itself. Enjoy!
![](/7537244/original-1607030434.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3MjQ0fQ%3D%3D--057ea60f7f59e0f4e64333d7bfe844b9616cb69f)
Navigating the X-ray sky
![](/7537270/original-1607030434.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3MjcwfQ%3D%3D--44a055d9e2ecbe189cfc35e0cc70a198a8540629)
The Shapley Supercluster seen in the eROSITA all-sky survey
![](/7537309/original-1607852563.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3MzA5fQ%3D%3D--5106b8dcfb1bbb9d630c91e9545afa6bde44c26e)
eROSITA's sparkling sky: the particle background
![](/7537296/original-1607263585.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3Mjk2fQ%3D%3D--88d091cdebf00830a9092b74e2bb9155166b8d57)
Operating eROSITA on-board SRG
![](/7540490/original-1607522003.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTQwNDkwfQ%3D%3D--9ffc3afcfaf6b8a9377cc0dba180bdeb8d05397b)
The eROSITA cameras
![](/7537218/original-1607030434.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3MjE4fQ%3D%3D--6c3eb24f4a27acf9254510b5f94c5cd15a6f88be)
eROSITA Mirrors
![](/7543765/original-1608113758.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTQzNzY1fQ%3D%3D--5b199ae8c7ac01009a75685a627b493c5af8d8a3)
The eFEDS Supercluster
![](/7540474/original-1607594174.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTQwNDc0fQ%3D%3D--36d449c45255871bb287f82485212acbb3755928)
A young quasar
![](/7537257/original-1607030434.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3MjU3fQ%3D%3D--2f13f279261cfd418761ae3dd4d35ba6dae892d9)
Vela and Friends
![](/7537231/original-1607522003.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3MjMxfQ%3D%3D--eb8eab4b00aa88ccff0cbc147b9ca6e737c9a9d5)
Calibrating eROSITA
![](/7542294/original-1607852259.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTQyMjk0fQ%3D%3D--f449cf895d6bd97b9d69992f05ffa931fe0731b2)
A weird, large amplitude X-ray flare in the nucleus of a galaxy
![](/7537375/original-1607522003.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3Mzc1fQ%3D%3D--c14ae3b940bf4cc9b44cde493a0098b68221a170)
ROSAT - The father of X-ray surveys
![](/7537322/original-1607522003.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3MzIyfQ%3D%3D--d40acfcdaf67aa8b3d09d9e46da8cb98fac8610c)
eROSITA finds large-scale bubbles in the halo of the Milky Way
![](/7536541/bild_01-1607030433.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM2NTQxfQ%3D%3D--35acfeebdac9eed2946a1b274c3e34fdcc644f15)
SRG/eROSITA Launch
![](/7537283/original-1625221694.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3MjgzfQ%3D%3D--a78870d0f6f6b5c613619722d58545d2d05a8e4c)
A giant dust scattering ring
![](/7537335/original-1607522003.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3MzM1fQ%3D%3D--2cabaec9806666d463bdd5fbb8ef6414e1b25d7c)
Study for Dark Matter and Dark Energy funded by ERC
![](/7537205/original-1607594174.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3MjA1fQ%3D%3D--37a4303445fe13ab8c0aa1d04f2a0734d6b986f2)
Introducing eROSITA on SRG
![](/7537626/original-1607871547.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3NjI2fQ%3D%3D--9296dbf45a69c1ca0f3ee06b8440878591ec893e)
SRG/eROSITA completes its second all-sky survey
![](/7536569/bild_02-1607030433.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM2NTY5fQ%3D%3D--8a48a5ec01ce51371151a2937feb0b2ea2941b91)
Revealing the Beauty of the Hidden Universe: eROSITA sees first light
![](/7537362/original-1607058379.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3MzYyfQ%3D%3D--7f250edf0c0c2b8422e826c3287c5fb0716727cc)
A supermassive black hole dims its X-ray lights
![](/7540506/original-1607950337.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTQwNTA2fQ%3D%3D--64f17c5dc24c22258b1c5b9e6816a53d3bbab065)
The Dark Universe
![](/7536597/bild_03-1607030433.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM2NTk3fQ%3D%3D--7bdd62a8b881affe58f22a96ffed25a6b344b066)
The supernova remnant N132D in the LMC
![](/7537348/original-1625221694.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTM3MzQ4fQ%3D%3D--d41c4ac03e265fc4a84ff06f996579685636dd36)
A supergiant fast X-ray transient in the LMC
![](/7540210/original-1607522002.jpg?t=eyJ3aWR0aCI6NjAwLCJoZWlnaHQiOjYwMCwiZml0IjoiY3JvcCIsImZpbGVfZXh0ZW5zaW9uIjoianBnIiwib2JqX2lkIjo3NTQwMjEwfQ%3D%3D--5ba4138efca8f395c0ea078ff8a9eded097ddb8b)
Longest intergalactic gas filament discovered