A dataset provided by the European Space Agency

Name 055356
Title Luminous Supersoft X-ray Quasars


DOI https://doi.org/10.5270/esa-0jfdk5o
Author Dr David Pooley
Description We will make short observations of 18 sources in a newly identified class of objects we call "supersoft X-ray quasars" (SXQs). These are high-luminosity quasars (Lx virgul4x10^44 - 10^46 erg-s) with extremely soft (i.e., steep) spectra that were discovered during the ROSAT All-Sky Survey. The proposed XMM observations will more than double the number of such objects for which spectra are available. In addition, we will observe for 40 ks one SXQ with a power-law spectral index of virgul7. Our objectives are (i) to characterize the spectra of SXQs over the full range of 0.2-10 keV, and (ii) to measure a multicomponent thermal disk spectrum. The latter will provide a direct handle on the black hole mass and spin.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2008-11-02T02:08:31Z/2009-04-29T07:25:23Z
Version 17.56_20190403_1200
Mission Description The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2010-05-27T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2010-05-27T00:00:00Z, 055356, 17.56_20190403_1200. https://doi.org/10.5270/esa-0jfdk5o