A dataset provided by the European Space Agency

Proposal ID 040674
Title Study of X-ray Weakness among Luminous Narrow-line Quasars
Download Data Associated to the proposal

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0406740101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0406740201

DOI https://doi.org/10.5270/esa-wqoqpqx
Principal Investigator, PI Dr Chiho Matsumoto
Abstract The unusual properties of Narrow-line Seyfert 1 galaxies (NLS1s) are thought toresult from a higher accretion rate relative to Eddington than broad-lineSeyferts. Luminous NLS1s should have the highest accretion rates of all. Withour recent study, several X-ray weak objects were found, and it is suggestedthat X-ray weakness may occur more frequently among more luminous regime. Toinvestigate the nature of X-ray weak objects, we propose XMM-Newton observationsof five optically-luminous X-ray--weak NLS1s.
Publications
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 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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2008-04-25T00:00:00Z
Last Update 2025-01-27
Keywords "accretion rate relative", "luminous nls1s", "xmm newton", "galaxy nls1s", "XMM-Newton", "xray weak objects", "accretion rates", "narrow line seyfert", "xray weakness", "XMM", "broad line seyferts", "luminous regime"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Chiho Matsumoto, 2008, 'Study of X-ray Weakness among Luminous Narrow-line Quasars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-wqoqpqx