A dataset provided by the European Space Agency

Name 084044
Title Deciphering the Remarkable X-ray Spectrum of the Weak-Line Quasar SDSSJ1521+5202


DOI https://doi.org/10.57780/esa-z67h4zr
Author Prof William Brandt
Description Recent investigations of weak-line quasars (WLQs) have led us to propose a simple model where a thick inner accretion disk, associated with an extremely high Eddington ratio, is responsible for both their weak lines and remarkable X-ray properties. We propose to test this model with a long observation of the optically ultraluminous WLQ SDSS J1521+5202. Our Chandra data show this source has a strikingly hard X-ray spectrum suggesting heavy absorption. The proposed high-quality XMM-Newton spectrum will determine if we are seeing the model.s predicted Compton-reflection dominated continuum due to Compton-thick absorption by the inner disk. If confirmed, our model will help establish relationships between inner accretion-disk properties and the accretion rate in all quasars.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2019-07-26T16:26:45Z/2019-12-16T04:45:41Z
Version 18.00_20191217_1110
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 2021-01-20T23:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2021-01-20T23:00:00Z, 084044, 18.00_20191217_1110. https://doi.org/10.57780/esa-z67h4zr