We propose EPIC and Optical/UV Monitor observations of the low-redshiftstrong-lensing elliptical galaxy ESO325--G004, and its surrounding group AbellS0740. The principal aims of the observation are (1) to test for the presence ofextended intra-group gas; (2) to measure a gas temperature for both the centralgalaxy component and the intra-group medium. The X-ray results will help toestablish the contribution of the group potential to the lensing mass, andcomplement lensing and dynamical mass estimates for the system at smaller radii.Simultaneous UV imaging with the OM will exploit the colour contrast against thered lens galaxy, to constrain the properties of the star-forming backgroundsource.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2007-01-21T18:27:36Z/2007-01-22T02:37:03Z
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 Russell Smith, 2008, 'Mass and Environment of a Low-Redshift Gravitational Lens Galaxy', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-74zn12f
