A dataset provided by the European Space Agency

Name: Polars - soft X-ray emitters?
Published: 2014-04-18T00:00:00Z

Proposal ID	069358
Title	Polars - soft X-ray emitters?
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0693580101
DOI	https://doi.org/10.5270/esa-g0t0iml
Principal Investigator, PI	Dr Axel Schwope
Abstract	The defining criterion of polars (AM Herculis stars) was their prominent softX-ray emission, which led to numerous discoveries with the EINSTEIN, EXOSAT,ROSAT and EUVE satellites. XMM-Newton discovered polars however and new polarsystems from optical surveys (SDSS, CSS) reveal growing evidence that theprevalence or even the existence of a soft X-ray component may be rather theexception than the rule. Here we propose XMM-Newton observations of 5 opticallyidentified polars to search for soft X-ray spectral components, answer thequestion why they escaped detection in past X-ray surveys and shed new light onthe intrinsic energy distribution and accretion energy release of polars.
Publications	XMM-Newton and optical observations of the eclipsing polar CSS081231:071126+440405 \|Worpel H. Schwope A. D. \| A&A \| 583-130 \| 2015 \| 2015A&A...583A.130W \| http://ui.adsabs.harvard.edu/#abs/2015A&A...583A.130W The Million Optical - Radio/X-ray Associations (MORX) Catalogue \|Flesch Eric W. \| PASA \| 33-52 \| 2016 \| 2016PASA...33...52F \| http://ui.adsabs.harvard.edu/#abs/2016PASA...33...52F Classification of 4XMM-DR9 sources by machine learning \|Zhang Yanxia Zhao Yongheng \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII O VIII and Fe L-shell Transitions \|Pan Zeyang Qu Zhijie et al. \| ApJS \| 271-62 \| 2024 \| 2024ApJS..271...62P \| http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P Robust constraints on feebly interacting particles using XMM-Newton \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-L101305 \| 2024 \| 2024PhRvD.109j1305L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L Multimessenger search for electrophilic feebly interacting particles from supernovae \|Luque Pedro De la Torre Balaji Shyam \| PhRvD \| 109-103028 \| 2024 \| 2024PhRvD.109j3028L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 968-46 \| 2024 \| 2024ApJ...968...46D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D New 511 keV Line Data Provide Strongest sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 973-L6 \| 2024 \| 2024ApJ...973L...6D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...973L...6D
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2013-04-08T14:03:55Z/2013-04-08T20:44:13Z
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	2014-04-18T00:00:00Z
Last Update	2025-08-04
Keywords	"XMM", "past xray surveys", "numerous discoveries", "XMM-Newton", "soft xray component", "polar systems", "accretion energy release", "optical surveys sdss", "escaped detection", "xmm newton", "ROSAT", "SDSS", "growing evidence", "euve satellites", "defining criterion", "energy distribution"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Axel Schwope, 2014, 'Polars - soft X-ray emitters?', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-g0t0iml