A dataset provided by the European Space Agency

Name 074028
Title Toward a long-term phase-connected ephemeris for the unique X-ray binary HD49798
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0740280101

DOI https://doi.org/10.5270/esa-n4ixfjc
Author Dr Sandro MEREGHETTI
Description HD 49798 is a unique X-ray binary composed of a 13.2 s pulsator, most likely the
fastest-rotating massive white dwarf (1.28+/-0.05 solar masses), orbiting the
brightest subdwarf of O spectral type. We obtained a phase-connected timing
solution, that should now be extended over a longer time period to unveil the
small variations in the spin period expected in this system. Their study will
allow us to unambiguously confirm the nature of the compact object, to shed
light on the accretion flow geometry and on the magnetic field intensity. This
is an updated version of a similar proposal accepted in C priority in AO12.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2014-10-18T07:55:25Z/2014-10-18T17:05:25Z
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 2015-11-13T23:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Sandro MEREGHETTI, 2015, 074028, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-n4ixfjc