A dataset provided by the European Space Agency

Name 065092
Title RX J0720.4-3125 - a free precessing X-ray pulsar?


DOI https://doi.org/10.5270/esa-i6icd00
Author Mr Markus Hohle
Description Within seven radio-quiet, thermally-emitting isolated NSs, RXJ 0720 is unique in that it shows long-term (virgulyrs) variations in its spectral parameters. Applying a phase-coherent timing solution with constant spin down leaves large residuals which may follow a cyclic pattern. The reasons for this behaviour is a matter of debate. Both a glitch and precession have been invoked, but present data do not allow to reach a firm conclusion. Most recent XMM observations show that the re- siduals probably reached a minimum of the cycle, while the spectral parameters evolution slowed down. The proposed observations will prove if the timing re- siduals follow a cyclic pattern and weather the spectral and timing variations are related. The outcome will rule out one of the two proposed scenarios
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2011-04-10T23:59:26Z/2011-04-11T06:04:39Z
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 2012-05-04T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2012-05-04T00:00:00Z, 065092, 17.56_20190403_1200. https://doi.org/10.5270/esa-i6icd00