A dataset provided by the European Space Agency

Name 072105
Title Toward a long-term phase-connected ephemeris for the unique X-ray binary HD49798


DOI https://doi.org/10.5270/esa-c1wq4nl
Author Dr Sandro MEREGHETTI
Description HD49798 is a unique binary composed of a 13 s pulsator, most likely the fastest-rotating massive white dwarf (1.28 Msun), orbiting the brightest O-type subdwarf. We recently obtained the first phase-connected timing solution, that should be extended over a longer period to unveil the small Pdot variations expected in this system. Their study will allow us to confirm the nature of the compact object, to shed light on the accretion flow geometry and on the magnetic field intensity, and to improve the accuracy on the orbital parameters of this interesting post-common envelope and possibly SN Ia progenitor system. Only if a new period measurement is obtained during the AO12 it will be possible to extend the phase-connection over a long time period with a small requirement on observing time.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2013-11-09T18:51:50Z/2013-11-10T06:11:50Z
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 2014-11-26T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2014-11-26T00:00:00Z, 072105, 17.56_20190403_1200. https://doi.org/10.5270/esa-c1wq4nl