The continued spectral and temporal evolution of RX J0720.4-3125

@article{Hohle2012TheCS,
  title={The continued spectral and temporal evolution of RX J0720.4-3125},
  author={Markus Matthias Hohle and Frank Haberl and Jacco Vink and Cor P. de Vries and Roberto Turolla and Silvia Zane and Mariano M'endez},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2012},
  volume={423},
  pages={1194-1199}
}
RX J0720.4-3125 is the most peculiar object among a group of seven isolated X-ray pulsars (the so-called Magnificent Seven), since it shows long-term variations of its spectral and temporal properties on time-scales of years. This behaviour was explained by different authors either by free precession (with a 7 or 14 yr period) or possibly a glitch that occurred around MJD = 528 66 +/- 73 d. We analysed our most recent XMMNewton and Chandra observations in order to further monitor the behaviour… 

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References

SHOWING 1-10 OF 28 REFERENCES

Spectral and temporal variations of the isolated neutron star RX J0720.4-3125: new XMM-Newton observations

Context. In the past, the isolated, radio-quiet neutron star RX J0720.4−3125 showed variations in its spectral parameters (apparent radius, temperature of the emitting area and equivalent width of

Evidence for precession of the isolated neutron star RX J0720.4-3125

The XMM-Newton spectra of the isolated neutron star RXJ0720.4-3125 obtained over 4.5 years can be described by sinusoidal variations in the inferred blackbody temperature, the size of the emitting a

Spectral and Rotational Changes in the Isolated Neutron Star RX J0720.4–3125

RX J0720.4-3125 is an isolated neutron star that, uniquely in its class, has shown changes in its thermal X-ray spectrum. We use new spectra taken with Chandra's Low Energy Transmission Grating

Timing analysis of the isolated neutron star RX J0720.4-3125

TLDR
It is found that RX J0720.4-3125 can have been born as a magnetar provided that it has a young age of similar to 10(4) yr, and the field strength has remained relatively unchanged at just over 10(13) G, over the similar to10(6)-yr lifetime of the star.

The Continued Spectral Evolution of the Neutron Star RX J0720.4–3125

We observed the isolated neutron star RX J0720.4-3125 with Chandra's Low Energy Transmission Grating Spectrometer, following the XMM-Newton discovery of the long-term spectral evolution of this

A Coherent Timing Solution for the Nearby Isolated Neutron Star RX J0720.4–3125

We present the results of a dedicated effort to measure the spin-down rate of the nearby isolated neutron star RX J0720.4-3125. Comparing arrival times of the 8.39 s pulsations for data from Chandra,

The proper motion and energy distribution of the isolated neutron star RX J0720.4–3125

ESO 4 m class telescope and VLT deep imaging of the isolated neutron star RX J0720.4-3125 reveals a proper motion of µ = 97 ± 12 mas/yr and a blue U − B color index. We show that a neutron star

The Parallax and Proper Motion of RX J1856.5–3754 Revisited

RX J1856.5-3754, a bright soft X-ray source believed to be the nearest thermally emitting neutron star, has commanded and continues to command intense interest from X-ray missions. One of the main

Timing the Nearby Isolated Neutron Star RX J1856.5–3754

RX J1856.5–3754 is the X-ray brightest among the nearby isolated neutron stars. Its X-ray spectrum is thermal, and is reproduced remarkably well by a blackbody, but its interpretation has remained

IS SGR 0418+5729 INDEED A WANING MAGNETAR?

SGR 0418+5729 is a transient soft gamma-ray repeater which underwent a major outburst in 2009 June, during which the emission of short bursts was observed. Its properties appeared quite typical of