English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The anomalous X-ray pulsar 4U 0142+61 was observed with Suzaku on 2007 August15 for a net exposure of -100 ks, and was detected in a 0.4 to ~70 keV energyband. The intrinsic pulse period was determined as 8.68878 \pm 0.00005 s, inagreement with an extrapolation from previous measurements. The broadbandSuzaku spectra enabled a first simultaneous and accurate measurement of thesoft and hard components of this object by a single satellite. The former canbe reproduced by two blackbodies, or slightly better by a resonant cyclotronscattering model. The hard component can be approximated by a power-law ofphoton index \Gamma h ~0.9 when the soft component is represented by theresonant cyclotron scattering model, and its high-energy cutoff is constrainedas >180 keV. Assuming an isotropic emission at a distance of 3.6 kpc, theunabsorbed 1-10 keV and 10-70 keV luminosities of the soft and hard componentsare calculated as 2.8e+35 erg s^{-1} and 6.8e+34 erg s^{-1}, respectively.Their sum becomes ~10^3 times as large as the estimated spin-down luminosity.On a time scale of 30 ks, the hard component exhibited evidence of variationseither in its normalization or pulse shape.

Soft and Hard X-Ray Emissions from the Anomalous X-ray Pulsar 4U 0142+61 Observed with Suzaku