A dataset provided by the European Space Agency

Proposal ID 014297
Title X-ray Observations of DW UMa: A Cure for the SW Sex Syndrome
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0142970101

DOI https://doi.org/10.5270/esa-bhlae5w
Principal Investigator, PI Dr Donald W. Hoard
Abstract We propose a 27 ksec XMM observation (with EPIC as prime instrument) of thenovalike CV and archetypal SW Sex star, DW UMa. Current models for the SW Sexsyndrome involve 3 scenarios: magnetic accretion, a disk wind, and streamoverflow. Our XMM light curve and spectral energy distribution (at theintrinsic energy resolution of the EPIC CCDs) will test and constrain themagnetic model. For example, DW UMa shows flares in its optical emission lineson timescales of tens of minutes, similar to those seen in some weakly magneticCVs. The detection (lack) of X-ray flaring will argue strongly for (against)the magnetic scenario. Confirmation of magnetic accretion would identify the SWSex stars as the intermediate polars with the highest mass transfer rates.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2003-10-18T00:23:09Z/2003-10-18T07:28:54Z
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 2004-11-05T00:00:00Z
Keywords "xray flaring", "novalike cv", "sw sex syndrome", "spectral energy distribution", "EPIC", "magnetic scenario", "epic ccds", "prime instrument", "stream overflow", "dw uma", "x ray", "disk wind", "magnetic accretion", "energy resolution", "XMM", "weakly magnetic cvs", "xmm light curve", "optical emission lines", "magnetic model", "sw sex stars", "mass transfer rates", "intermediate polars"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Donald W. Hoard, 2004, 'X-ray Observations of DW UMa: A Cure for the SW Sex Syndrome', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-bhlae5w