A dataset provided by the European Space Agency

Name 067523
Title Polars - soft X-ray emitters?


DOI https://doi.org/10.5270/esa-93tcl4i
Author Dr Axel Schwope
Description The defining criterion of polars (AM Herculis stars) was their prominent soft X-ray emission, which led to numerous discoveries with the EINSTEIN, EXOSAT, ROSAT and EUVE satellites. XMM-Newton observations of those X-ray selected polars and genuine discoveries of new polar systems reveal growing evidence that the prevailence or even the existence of a soft X-ray component may be rather the exception than the rule. In the last decade polars were discovered in optical surveys like the SDSS and the CSS. Here we propose XMM-Newton observations of 5 optically selected polars to search for soft X-ray spectral components, answer the question why they escaped detection in past X-ray surveys and shed new light on the intrinsic energy distribution of polars.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2012-01-26T12:37:26Z/2012-04-10T20:59:28Z
Version 17.56_20190403_1200
Mission Description The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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 2013-04-25T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013, 067523, 17.56_20190403_1200. https://doi.org/10.5270/esa-93tcl4i