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
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	2025-01-27
Keywords	"energy distribution", "optical surveys sdss", "polar systems", "soft xray component", "accretion energy release", "defining criterion", "SDSS", "xmm newton", "growing evidence", "XMM-Newton", "ROSAT", "past xray surveys", "XMM", "euve satellites", "numerous discoveries", "escaped detection"
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