A dataset provided by the European Space Agency

Proposal ID 030656
Title X-ray eclipse mapping of disc-accreting white dwarfs
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0306560301

DOI https://doi.org/10.5270/esa-vxa0qm0
Principal Investigator, PI Dr Peter Wheatley
Abstract We have applied the proven optical technique of eclipse mapping to X-rayobservations of disc-accreting white dwarfs, allowing us to map the extent anddistribution of X-ray emitting plasma around the compact object. Observations offour different systems have allowed us to build a consistent picture of theaccretion geometry that depends only on accretion rate. At low rates the X-rayregion is smaller than the white dwarf, but at high rates it is much larger.Here we propose an observation of ONE of our well-studied low accretion ratesystems, to be triggered when it enters a high accretion rate state. This willallow us to test our basic picture in a system that differs only in accretionrate and investigate the origin of the second source of X-rays.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2005-09-30T01:22:41Z/2005-10-01T02:05:14Z
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 2006-10-25T00:00:00Z
Keywords "accretion rate", "low rates", "proven optical technique", "white dwarf", "accretion geometry", "compact object", "basic picture", "xray emitting plasma", "eclipse mapping", "xray region"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Peter Wheatley, 2006, 'X-ray eclipse mapping of disc-accreting white dwarfs', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-vxa0qm0