We propose XMM observations of 10 galaxy clusters at z<0.075 , located within a 40\times 40 deg ^2 region around the approximate location of the Great Attractor (GA), to explain the observed large-scale flow toward and beyond the GA. All targets were found in the course of the CIZA X-ray cluster survey, 9 of them are new discoveries. Our total sample of 12, which also includes A3627 andTriangulum Australis, represents a complete census of the most X-ray luminous and thus likely most massive clusters in this region. The proposed observations will allow us to measure accurate cluster masses, which in turn will permit a reconstruction of the local gravitational field that is independent of and complementary to the one based on the density of IRAS-selected field galaxies.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2003-02-10T12:57:32Z/2003-09-06T05:13:13Z
Version
17.56_20190403_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
European Space Agency, Dr Harald Ebeling, 2004, 'Weighing the largest mass concentrations in the Great Attractor region', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-f8zjtg4
