A dataset provided by the European Space Agency

Name 055186
Title Long-term X-ray Timing of Ultra-compact Binaries
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0551860101
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0551860501

DOI 10.5270/esa-mm5rdua
Author Dr Tod Strohmayer
Description We propose short timing observations of V407 Vul, and RX J0806.3+2756; unique binary systems with the shortest inferred orbital periods known. Both systems show secular spin up of their phase-locked X-ray and optical pulsations with rates consistent with orbital evolution driven by gravitational radiation losses. Phase coherent timing of all current data for these sources is approaching the level at which the second frequency derivative can be measured. The value of this quantity is an important discriminator for models of the X-ray emission in these objects (Dall.Osso et al. 2007; Deloye & Taam 2006), and future, precise constraints on this parameter require simply that the existing timing baseline continue to be extended with short, annual observations. Here we propose such observations
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Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2008-10-05T20:54:00Z/2008-11-12T09:36:50Z
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 2009-12-02T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2009-12-02T00:00:00Z, 055186, 17.56_20190403_1200. https://doi.org/10.5270/esa-mm5rdua