A dataset provided by the European Space Agency

Proposal ID 000802
Title Demystifying the supersoft X-ray binary RXJ0439.8-6809
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0008020101

DOI https://doi.org/10.5270/esa-53n3brw
Principal Investigator, PI Dr Boris Gaensicke
Abstract The supersoft X-ray source RX J0439.8-6809 is an extraordinary rareand interesting object: It is either the hottest known pre-white dwarfor an ultra-short period accreting double-degenerate white dwarfbinary. In each case, J0439.8-6809 is an important cornerstone for thetheory of stellar evolution, either post-AGB star evolution or theevolution of close binary systems. We propose to use the unprecedentedX-ray sensitivity of XMM to clarify the nature of this object and todiscern between these two hypotheses. With a 20 ksec XMM observationwe will be able to detect binary orbital variability on minute timescales down to an amplitude of virgul1 percent. The EPIC pn/MOS spectra
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2001-11-01T05:35:11Z/2001-11-01T11:52:05Z
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 2003-02-16T00:00:00Z
Keywords "mos spectra", "extraordinary rare", "XMM", "xray sensitivity", "close binary systems", "J0439.8", "epic pn", "stellar evolution", "EPIC", "binary orbital variability", "minute time scales", "pre white dwarf"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Boris Gaensicke, 2003, 'Demystifying the supersoft X-ray binary RXJ0439.8-6809', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-53n3brw