A dataset provided by the European Space Agency

Proposal ID 030560
Title Changing type Seyferts and the AGN unified model
Download Data Associated to the proposal

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0305600501
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0305600601

DOI https://doi.org/10.5270/esa-b2nvckj
Principal Investigator, PI Prof Xavier Barcons
Abstract In AO-3 we started a quasi-simultaneous X-ray/optical spectroscopy observationprogramme of changing type Seyfert galaxies, with the aim of investigating theorigin of the apparent X-ray/optical type mismatches seen in some AGN. We usethese type-changing AGN to test whether this mismatch is caused bynon-simultaneity between the X-ray and optical observations or it is due tointrinsic properties of the Broad Line Region, as suggested by our previouswork. In this proposal we request XMM-Newton observations of a sample of 5targets (in addition to that already performed in AO-3). Quasi-simultaneous anddelayed optical spectroscopy of these targets will also be obtained from theground.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2005-10-27T00:31:37Z/2006-06-14T21:09:56Z
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 2007-07-01T00:00:00Z
Keywords "type changing agn", "XMM", "xmm newton", "changing type seyferts", "delayed optical spectroscopy", "broad line region", "XMM-Newton", "agn unified model", "optical type mismatches", "apparent xray", "optical spectroscopy"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Prof Xavier Barcons, 2007, 'Changing type Seyferts and the AGN unified model', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-b2nvckj