A dataset provided by the European Space Agency

Name 020109
Title THE X-RAY/OPTICAL AGN TYPE MISMATCH: REALITY OR VARIABILITY
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201090201
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201090401

DOI https://doi.org/10.5270/esa-fctyz6c
Author Prof XAVIER BARCONS
Description The mounting evidence for non-matching AGN spectral type and X-ray absorption is
almost invariably based on non-simultaneous optical and X-ray observations. Both
properties are known to be variable in some AGN. The aim of the present proposal
is to solve the dichotomy on whether both optical and X-ray obscuration are
closely related (as predicted by the unified AGN picture) but variable, or else
these properties are really mismatched in some objects. We propose XMM-Newton
observations, simultaneous to optical spectroscopy, of a representative
selection of AGNs whose optical spectral type is known to be variable.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-01-23T16:53:53Z/2005-01-15T21:35:45Z
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 2006-06-15T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Prof XAVIER BARCONS, 2006, 020109, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-fctyz6c