Giga-Hertz-Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) sources arebelieved to be either young or ..frustrated versions. of the large-scale radiosources. In X-ray surveys they constitute a high fraction of sources at highredshifts, they are the brightest quasars at radio, optical, and X-raywavelengths, and they are frequently associated with intrinsic excessabsorption. High-z quasars give, on the other hand, precious information on thephysical conditions in the early Universe. We propose an observation of a sampleof high-z GPS quasars, with the purposes of studying the connection between theGPS phenomenon and intrinsic absorption at high redshift and to examine thespectral differences with respect to the bulk of radio-loud quasars.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2005-04-01T13:18:14Z/2006-01-20T01:56:04Z
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, Ms Elisa Ferrero, 2007, 'High-redshift GPS/CSS quasars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-4ltq6nx
