A dataset provided by the European Space Agency

Name 040674
Title Study of X-ray Weakness among Luminous Narrow-line Quasars


DOI https://doi.org/10.5270/esa-wqoqpqx
Author Dr Chiho Matsumoto
Description The unusual properties of Narrow-line Seyfert 1 galaxies (NLS1s) are thought to result from a higher accretion rate relative to Eddington than broad-line Seyferts. Luminous NLS1s should have the highest accretion rates of all. With our recent study, several X-ray weak objects were found, and it is suggested that X-ray weakness may occur more frequently among more luminous regime. To investigate the nature of X-ray weak objects, we propose XMM-Newton observations of five optically-luminous X-ray--weak NLS1s.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2006-10-22T12:37:30Z/2007-04-10T15:49:06Z
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 2008-04-25T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2008-04-25T00:00:00Z, 040674, 17.56_20190403_1200. https://doi.org/10.5270/esa-wqoqpqx